Answer:
A
Explanation
The United States took first steps to keep the air clean.
Cost-effective ways to reduce pollution were emphasized.
The United States created the environmental protection agency.
Modifications and improvements were made to the Clean Air Act.
Funding was established under the Clean Air Act to study air pollution
Down syndrome can be observed in a karyotype/karyogram Xray frameshift point mutation
Down syndrome can be observed in a O karyotype/karyogram O X ray O frameshift point. DNA replication is necessary for all the responses are correct O growth
According to the Cell Theory, the is the basic unit of life; according to the Organismal Theory the is the basic unit.
Answer: The second part
Explanation:
The cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life.
If a strand of hair has a continuous medulla pattern, and the Medulla Index is 42, what species would it most likely be from?
Cat
Insect
Human
Polar Bear
Answer:
It's a cat
Explanation:
I got it correct on my exam.
When the medulla index is above 33 and has a continuous pattern it's animal hair.
Which of the below terms would be different if the reflex were a balance reflex? What term would you substitute?
Pain receptor, sensory neuron, spinal cord, motor neuron, & effector muscle.
Answer:you i am minon pituf an red
Explanation:
The _____ control(s) the force of a movement, whereas the_____ control(s) the timing and accuracy of the movement.a.motor cortex; basal gangliab.basal ganglia; motor cortexc.basal ganglia; cerebellumd.cerebellum; basal ganglia
The basal ganglia A movement's force is controlled by the cerebellum, while its timing and accuracy are controlled by the cerebellum.
What determines a movement's force?The Motor Complex The brain is in charge of all voluntary actions of the body. The motor cortex is one of the parts of the brain that is most crucial in regulating these voluntary movements.
What function does the basal ganglia play in motor control?The network of brain cells and nerves that manages your body's voluntary motions includes the basal ganglia as a significant component. Your brain sends movement signals that they can either approve or reject, screening away erroneous or superfluous impulses.
To know more about basal ganglia visit :-
https://brainly.com/question/4109433
#SPJ4
Which of the following best explains why triploid bananas do not produce seeds?
A) the cells of the banana plant are unable to replicated DNA, thus preventing cell division and limiting growth
B) the banana plants lack enough genetic diversity to properly hybridize
C) the production of gametes is disrupted because of unequal pairing of homologous chromosomes during meiosis
D) the production of seeds is not required because triploid plants produce gametes without fertilization
The following best explains why triploid bananas do not produce seeds: Banana cells are ill-suited to DNA replication, preventing cell division and limiting growth.
Triploid bananas are sterile and extremely sterile plants are barren. However, the banana fruit is produced without seeds and is a placental mammalian companion without fertilization or embryos.
A triploid plant does not produce viable seeds on its own, so the fruit is seedless. Successful seed set is truly rare, as triploids rarely produce eggs or sperm with a balanced set of chromosomes. Bananas, too, are parthenocarpic and produce fruit in the lack of successful fertilization. These triploid bananas reproduce asexually.
Occasionally, triploid banana plants produce mutants. This is an inherited defect that carries her three copies of every chromosome, rendering new plants unable to produce viable seeds.
For more information on triploid bananas, visit ;
https://brainly.com/question/13248140
#SPJ4
You continue your analysis by crossing the forked and twist lines. Your results are as follows: Which of the following statements best explains the outcome of this cross? O The forked mutation has recombined with the twist mutation. O The forked mutation and the twist mutation are codominant alleles of the same locus. O The forked mutation is incompletely dominant to the twist mutation. O The twist mutation is incompletely dominant to the forked mutation. O The forked mutation is epistatic to the twist mutation. O The twist mutation is epistatic to the forked mutation.
The Codominant alleles of the same gene include the twist mutation and the forked mutation.
A monohybrid cross is one in which the two lines crossed are mutant via mutation at the same locus and in which the F2 lacks wild-type offspring. The phenotype in codominance displays both alleles present in the genotype. Alleles from the genotype are mixed together in the phenotype in incomplete dominance. In contrast to codominance, which involves the child displaying the features of both parents, incomplete dominance occurs when neither parent's characteristics are fully expressed in the offspring.
Learn more about mutation here:
https://brainly.com/question/17130462
#SPJ4
Feeding relationships can be represented by different models—how can we decide when one model is better than another?
Im offering 25 points help me
Feeding relationships can be represented by different models and we can decide when one model is better than another if the flow of energy and matter is well represented.
What is Feeding relationship?This is referred to as a model which involves one organism eating another to gain nutrition being represented in various ways.
An example is a food chain which depicts how energy and matter flows in the ecosystem as a result of it being represented by the organisms involved and also the diorection in which the flow occurs which is therefore the reason why it was chosen as the correct choice.
Read more about Feeding relationship here https://brainly.com/question/12410875
#SPJ1
PLEASE HELP BY TONIGHT: The ability to taste phenylthiocarbamide (PTC) is controlled in humans by a single dominant allele (T). A woman who is a nontaster married a man and they had three children, two boy tasters and a girl nontaster. All the grandparents were tasters. Create a pedigree of this family of this trait. Solid symbols should signify nontasters. Where possible, indicate whether the tasters are TT or Tt.
Answer:
T (TT)
|
Tt
/ \
Tt tt
/
TT Tt
Explanation:
In this pedigree, the solid symbols (circles or squares) represent nontasters (tt), and the open symbols (circles or squares with a horizontal line) represent tasters (TT or Tt). The parents of the three children are both tasters (Tt), and both sets of grandparents are tasters (TT). The two boys are tasters (TT or Tt), and the girl is a nontaster (tt).
FILL IN THE BLANK. Angular movements (flexion, extension, hyperextension, etc.), like bending your arm at your elbow involves the use of the ______________ joints.
Angular movements involves flexion, extension, hyperextension etc. like bending your arm at your elbow involves the use of the attached joints.
Angular movements are delivered by changing the point between the bones of a joint. There are a few unique kinds of precise developments, including flexion, expansion, hyperextension, kidnapping, adduction, and circumduction. Flexion, or twisting, happens when the point between the bones diminishes.
Moving the lower arm up at the elbow or moving the wrist to push the hand toward the lower arm are instances of flexion. In expansion, something contrary to flexion, the point between the bones of a joint increments. Fixing an appendage after flexion is an illustration of expansion.
Augmentation past the typical physical position is alluded to as hyperextension. This incorporates moving the neck back to look up or bowing the wrist so the hand gets away from the lower arm.
To know more about Angular movements, visit here:
https://brainly.com/question/14979994
#SPJ4
Free-floating periodontal pathogens can cause periodontal disease. Biofilm development always begins supragingival.
Select one:
A. Both statements are true
B. Both statements are false
C. The first statement is true; the second is false
D. The first statement is false; the second is true
The first statement is false, the second statement is true.
which of the following research questions would best guide an investigation of the link between the structure of the signaling molecules and the evolution of quorum sensing?
Bacteria secrete signal molecules into their current circumstance and utilize these to direct a large number of their key aggregates. This is called majority detecting and it is remembered to advance since it permits cells to detect their thickness.
Quorum sensing (QS) is a flagging instrument by which microorganisms impart among themselves and with different creatures (1-3). Through QS, they sense and answer ecological changes by means of sign transduction occasions involving flagging particles in a thickness-subordinate way (4).
In the majority of detecting, microbes screen the thickness of the populace (the number of different microorganisms nearby) in view of synthetic signs. While the flagging arrives at an edge level, every one of the microorganisms in the populace will change their way of behaving or quality articulation simultaneously.
To learn more about Quorum sensing here
https://brainly.com/question/6249018
#SPJ4
Answer:
Did these species evolve from a common ancestor that used a similar signaling molecule?
Explanation:
T/F in general, the metabolic oxidation of protein in mammals is less efficient, in terms of energy conserved, than the metabolic oxidation of carbohydrate or fat.
It is true that the metabolic oxidation of protein in mammals is less efficient, in terms of energy conserved, than the metabolic oxidation of carbohydrates or fat.
Aerobic life naturally results in protein oxidation in vivo. Changes in the amino acids of proteins caused by oxygen radicals and other activated oxygen species, either as byproducts of cellular metabolism or from the environment, typically result in the loss of protein function or enzymatic activity.
Adenosine triphosphate (ATP) can be produced by oxidizing carbohydrates and protein. Amino acids can enter the metabolic pool when proteins are broken down. After that, the amino acids can enter the metabolic pathway at any one of the following points: the citric acid cycle, the conversion of acetyl CoA, and the conversion of pyruvate. Glycolysis is where carbohydrates begin their journey through the metabolic pathway.
know more about protein oxidation here: https://brainly.com/question/13061275
#SPJ4
Describe THREE ways in which applied anthropology can use the perspectives,
methods, and data of the differrent sub-fields of anthropology to help solve real-
world problems.
By researching cultures where particular social interactions are less contentious. understanding what, in a sense, makes a society or a group of people tick Will provide insight into how these linkages work.
Why should one study anthropology?The detailed investigation of humans is known as anthropology, and its objectives include gaining an understanding of human evolution, our uniqueness as a race, and the wide variety of human societal systems that have existed across history of mankind and now.
What, for instance, is anthropology?Anthropologists and people who conduct study team concentrate on the traits that define what it is to be a person. One anthropologist would look at the mating habits of a small community in New Guinea, whereas another might look into mating habits at a university. Humanity research is crucial.
To know more about anthropology visit:
https://brainly.com/question/14891261
#SPJ1
Explain why stains would be removed faster with detergent in water at 35degrees celsius rather thab at 15 degrees celsius
Answer: hm
Explanation: and hm
NEED HELP DUE TOMORROW
Dependent variable is the amount of dirt and independent variable is the type of detergent used.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
Learn more about variables,here:
https://brainly.com/question/15740935
#SPJ1
If you were a subject in a scientific study measuring body fatness, the scientists might assess your anthropometric measurements using one of a variety of methods. Determine which method is being explained and drag the method description to its appropriate classification category You are placed in a chamber that measures body volume by measuring the volume of you displace while sittin Inside the chamber You stand on a scale placing your bare feel on the metal contact pants on the device The ansaw level electual current oth you cautions of percent body Balare made based on the concept than body mass conducts current and al mass resists Current
You lie on your back and a machine distributing low levels of radiation scans over you calculating percentages of tat lean issue, and bone mass You are weighed on a standard scale and then weighed again while submerged in water, the difference between the two weight is used to estimate total body volume A clinician uses fat calipers to measure the layer of a directly under the skin from a number of points on your body
Identify a true statement of the subjective effects of marijuana.
infrequent smokers are likely to experience more intense subjective effects
Infrequent smokers are likely to experience more intense subjective effects.
Cannabis also known as marijuana among other names, is a psychoactive drug from the cannabis plant. Native to Central or South Asia, the cannabis plant has been used as a drug for both recreational and entheogenic purposes and in various traditional medicines for centuries.
Tetrahydrocannabinol (THC) is the main psychoactive component of cannabis, which is one of the 483 known compounds in the plant, including at least 65 other cannabinoids, such as cannabidiol (CBD). Cannabis can be used by smoking, vaporizing, within food, or as an extract.
Learn more about Cannabis to visit this link
https://brainly.com/question/28701225
#SPJ4
Sara is an excellent ballet dancer who just began taking a class in modern dancing. as she learns this new style, practicing the different movements involved, which of the following parts of her brain will play the biggest part in helping her learn?
- basal ganglia
- amygdala
- hippocampus
- pariental lobe
the Basal ganglia of her brain will play the biggest part in helping her learn this new style of ballet dancing.
The term "basal ganglia" refers to a group of subcortical cores that are primarily responsible for engine control, as well as other tasks such as engine learning, chief capacities and practices, and so on.
The basal ganglia are a bunch of structures in your brain's center that form significant associations. These connections allow multiple parts of your brain to communicate with one another. The basal ganglia monitor the signals sent by your brain that allow you to move your muscles.
There are a few contrasts in humans and a few primates, primarily in the division of the globus pallidus into an outer and inner district, and in the division of the striatum.
For more information on Basal Ganglia, visit :
https://brainly.com/question/4109433
#SPJ4
Help me please on #4 I will mark brainzillest
Differentiated cells may look different but they have the same functions, the cells become grouped with similar cells result into formation of tissues, they make up tissues and organs of multicellular organisms. Thus, the correct option is B.
What is Cell differentiation?
Cellular differentiation or cell differentiation is the process through which a stem cell undergoes change from an undifferentiated form to a differentiated one. Usually, the cell changes to a more specialized type in this process.
The fundamental benefits of cellular differentiation includes the formation of more specialized and efficient cells which are involved in performing specific functions. For example, to ease water transport through the tracheary parts of the xylem, these cell loses its protoplasm and develops a lignified cell wall. The red blood cells in the living organisms which loose organelles to make more space for the hemoglobin pigment in the cell.
Therefore, the correct option is B.
Learn more about Cell differentiation here:
https://brainly.com/question/18639909
#SPJ1
Sudden infant death syndrome, preterm births and low birth weights, respiratory problems, and cardiovascular problems are more common among the offspring of mothers who ______ during pregnancy.
Sudden infant death syndrome, preterm births and low birth weights, respiratory problems, and cardiovascular problems are more common among the offspring of mothers who smoked during pregnancy.
Smoking during pregnancy can result in various different types of challenges during birth and mostly results in premature births, babies being born with low weights, or sudden infant death syndrome.
The lungs of infants whose mothers smoked during pregnancy are damaged which causes severe breathing problems in the child. It also causes the child to not develop properly and have respiratory or cardiovascular problems. Women who smoked during pregnancy can also cause severe complications to their own lives at the time of delivery.
To learn more about pregnancy, click here:
https://brainly.com/question/862356
#SPJ4
the feeling that ejaculation can no longer be controlled is called ejaculatory: a. intervention. b. inevitability. c. excitement. d. orgasm.
Which of the following would be a reasonable conclusion if hair was found to have a drug in the middle of the strand but not in the rest of the hair strand?
Drug use is not identified.
Drug use is currently happening.
Drug use occurred several weeks ago.
Drug use has occurred for several months.
Answer:
drug use occurred several weeks ago.
Explanation:
the pharmacogenetic profiling reveals a mutation in a cyp450 enzyme that causes increased enzyme activity. which of the statements below is incorrect? - There are variations in the enzymes as a result of genetic polymorphism
- It would require that the patient with this mutation is given greater than the standard dose of a drug if it is metabolized by this enzyme
- The profiling can be used to predict drug-drug interactions
- The CYP450 variants have no influence on drug metabolism
The CYP450 variants have no influence on drug metabolism.
How many different CYP450 subtypes exist?Although there are more than 50 CYP450 enzymes, 90% of medicines are metabolized by CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP3A4, & CYP3A5 enzymes.These enzymes are mostly produced in the liver, although they are also found in the kidneys, placenta, lungs, small intestine (where they decrease medication bioavailability), and lungs.
Which CYP450 metabolizes medicines the fastest?The most prevalently expressed responsible for the conversion enzyme in humans, CYP3A4, is in charge of breaking down more than 120 different drugs. As a result, it is crucial to research enzyme-based drug interactions.
To know more about cyp450 visit:
https://brainly.com/question/14617330
#SPJ4
According to the law of superposition, fossils found at which position in these
layers of rock are likely to be the youngest?
Ο Α. Α
OB. B
О с. с
OD. D
ED
C
A
We
B
The law of superposition states that fossils found in the uppermost layers, i.e., layer A, are more recent than those found in the other layers, so option A is correct for the youngest fossil.
What is the fossil's importance?When the environment changes due to climatic changes, animals or plants remain under the rocks, leaving their imprints or hard parts of their bodies, which are later studied to learn about ancestors. The fossils that are present in the lowermost rock layers are the oldest, while the uppermost layer is the youngest as it is newly formed.
As a result, the law of superposition states that fossils found in the uppermost layers, i.e., layer A, are more recent than those found in the other layers, so option A is correct for the youngest fossil.
Learn more about the fossil's importance here.
https://brainly.com/question/19507461
#SPJ1
The letters in the diagram below represent genes on a particular chromosome.
Gene B contains the code for an enzyme that cannot be synthesized unless gene A is also active. Which statement best explains why this can occur?
(1) A hereditary trait can be determined by more than one gene.
(2) Genes are made up of double-stranded segments of DNA.
(3) All the genes on a chromosome act to produce a single trait.
(4) The first gene on each chromosome controls all the other genes on the chromosome.
More than one gene may contribute to a genetic trait.
Polygenic Character
A trait that is influenced by two or more genes, such as height or skin tone, is referred to as a polygenic trait. Polygenic traits do not follow the laws of Mendelian inheritance since several genes are involved.
Multifactorial traits are many polygenic qualities that are additionally influenced by the environment.
Multigenic trait We've discovered that the genetic component of many of the most significant health conditions of our time, such as cancer, heart disease, and diabetes, is caused by the interactions of many different genes as we've gotten better at identifying regions of the human genome that are associated with disease and at analyzing complex genomic data. Thus, polygenic, or having numerous genes. Studying these problems has been exciting since it has revealed how much may be done to improve human health by using the methods currently available to forecast the hazards associated with polygenic features.
Learn more about " genetic trait " to visit here;
https://brainly.com/question/2655226
#SPJ4
Which two conditions will contribute to the stability of drug-target interactions?
Options:
-The potential energy of the drug-target complex is at its lowest
-The shape of the drug molecule fits into the binding pocket of the target molecule
-The diffusion coefficient of the cell is very small
-The internal energy of the molecule is lower than the ambient temperature
Answer:
Two conditions that can contribute to the stability of drug-target interactions are:
-The shape of the drug molecule fits into the binding pocket of the target molecule. This allows the drug to interact with the target in a specific, complementary way, which can increase the stability of the complex.
-The potential energy of the drug-target complex is at its lowest. This means that the drug and target molecules are interacting in a way that minimizes the overall energy of the system, which can increase the stability of the complex.
pls award brainliest!
Explanation:
which of the following is found in the posterior mediastinum? group of answer choices thoracic duct heart right lymphatic duct primary bronchi thymus
The posterior thoracic mediastinum contains the descending aorta. A)Thoracic duct is found in posterior mediastinum. So, correct option is A.
The posterior Mediastinum is a sporadic three-sided space running lined up with the vertebral segment. The most striking blood vessel branches in this district are the proximal bits of the intercostal courses. It is limited in front by the pericardium above, and by the back surface of the stomach beneath, behind by the vertebral section from the lower boundary of the fourth to the twelfth thoracic vertebra, and on one or the other side by the mediastinal pleura.
It contains the thoracic piece of the dropping aorta, the azygos and the two hemiazygos veins, the vagus and splanchnic nerves, the throat, the thoracic pipe, and some lymph organs.
Hence, correct option is A.
To know more about posterior mediastinum, visit here:
https://brainly.com/question/29602909
#SPJ4
(Complete question) is:
which of the following is found in the posterior mediastinum? group of answer choices
a)thoracic duct
b)heart right lymphatic duct
c)primary bronchi
d)thymus
a mutation in the HBB gene,which codes for hemoglobin , produces red blood cells that are rigid and sickle shaped (is that beneficial, neutral, or harmful
Answer: harmful
Explanation:
Normally, red blood cells are flexible and oval-shaped, which allows them to move easily through the blood vessels and deliver oxygen to the body's tissues. However, sickle-shaped red blood cells are inflexible and can become stuck in small blood vessels, blocking the flow of blood and oxygen. This can cause a range of serious health problems, such as pain, infection, organ damage, and even death.
based on the information provided in the passage, which of the following best describes the effect of harmful algal blooms on otter populations?
'They are a density-independent factor that negatively affects the otter population regardless of its size' best describes the effect of harmful algal blooms on otter populations.
What are Algal blooms?
Algal blooms are large concentrations of aquatic microorganisms, primarily algae, that can occur in freshwater and marine ecosystems. They can range in color from green to yellow, brown, or red. Algal blooms are caused by an overgrowth of algae due to an abundance of nutrients, such as phosphorus and nitrogen, that are released into the water from sources such as agricultural runoff, sewage, and fertilizer. While some algal blooms are harmless, others can produce toxins that can be harmful to humans, wildlife, and the environment.
Hence, Option A is correct.
To know more about Algal blooms,
https://brainly.com/question/725774
#SPJ4
Complete question:
Based on the information provided in the passage, which of the following best describes the effect of harmful algal blooms on otter populations?
A) They are a density-independent factor that negatively affects the otter population regardless of its size.
B) They are a density-independent factor that increases otter mortality in larger populations.
C) They are a density-independent factor that reduces otter numbers at lower population sizes.
D) They are a density-independent factor that increases otter mortality in only larger populations.