Answer/Explanation:
Natural selection is the process in which populations of organisms adapt and change due to their environment. Natural selection can cause a population to go extinct because if the organisms are not suited for their environment, they will eventually die off.
Let's take Charles Darwin's finches on the Galapagos Islands for example. These finches have an incredible diversity in their beak size, shape, etc. This is because the finches need to adapt to their environment in order to survive. During his studies, Darwin noticed a drought was happening on the islands. The finches with the larger-than-average beaks started to die off because the only food available was tiny seeds that only small beaks were able to get. Because of this, the population of the finches changed throughout generations to have smaller beaks, so they wouldn't starve. This is a prime example of natural selection because the finches with the small beaks survived while the finches with the larger beaks did not.
In conclusion, natural selection can help explain how a population becomes extinct because if a population is not suited for their environment they will not survive.
Hope this helps!! If you have any questions about what I said, please leave them down in the comments!
Identify the viral structure described.
have a capsid that has polyhedral and helical characteristics, and may have extra structures like protein tails. Bacteriophages are examples.
have an outer lipid bilayer known as a viral envelope, which is studded with proteins. Influenza and HIV are examples.
have many triangular faces. Most have 20 triangular faces and 12 corners. Polio and the papilloma virus are examples.
have long narrow capsids shaped liked cylinders. Rabies and ebola are examples.
1. Complex viruses
2. Enveloped viruses
3. Polyhedral viruses
4. Helical viruses
What is virus structure?Viruses are infectious particles comprising of two components:
An outer structural component called the Capsid.
The inner genetic material made of single stranded or double stranded RNA (Ribonucleic Acid) or DNA (Deoxyribonucelic Acid).
The Capsid structure is made up of glycoproteins.
These glycoproteins are encoded by genes present in the viral genome.
The viruses are incapable of reproducing on its own.
They infect the host cells and hijack their metabolic machinery which includes the protein-synthesizing machinery and also utilize the raw materials of the host cells to produce the progeny virions which are then released out the host cells.
The capsid structure is responsible for packaging the viral genome and protecting it from various degrading agents present in the external environment like nucleases.
Thus, this could be the answer.
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does anyone know how to do this ? You are a bio-researcher on the planet Tawniwani, and you have been given the task of identifying and classifying the native fauna. Use this dichotomous key to identifyTawniwanian creature t.
A dichotomous key is a classification tool used to identify organisms based on morphological or behavioral characteristics. Individual C is a Roundus tricurlus.
What is a dichotomous key?
A dichotomous key is a significantly useful tool to classify organisms.
If you have an organism -or part of it- and you need to taxonomically identify it, you use a dichotomous key.
The key provides an easy and fast way for identification by describing different morphological or behavioral traits, leading you to the correct taxonomic classification.
The term dichotomous refers to how information is provided.
You will always have two options per feature (a and b, or 1 and 2), and you will have to choose one of them according to the characteristics of your organism.
Once you choose one of the options according to your organism, the key leads you to the following description, and you will have to choose one of the options again.
You will repeat this until you reach the name of your organism.
The key describes only specific traits that are useful for differentiation.
In the exposed example, for instance, we need to know the name of the individual C.
Step 1The first description is about the head size. The key asks you if the individual has a small or a large head. It has a small head, so the key tells you to move to description 2.
1a. Has a small head--------------------------- go to 2
1b. Has a large head--------------------------- go to 3
Step 2The second description is about the body shape. The key asks you if your organism has a narrow or a rounded body. And this individual has a rounded body, so the key tells you to move to description 7.
2a. Has a narrow body ------------------------ go to 6
2b. Has a round body -------------------------- go to 7
Step 3The seventh description is about antennae. Does your individual have curly or straight antennae? It has curly antennae. You have reached your organism's name. It is a Roundus tricurlus.
7a. Has a curly anteanne ------------------------ Roundus tricurlus
7b. Has a straight antennae--------------------- go to 8
Individual C is a Roundus tricurlus.
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A plant can produce either purple flowers or white flowers. The purple flower color is dominant over the white flower color. What is the ratio of the offspring with purple flowers to the total number of offspring if two plants that are heterozygous for purple flowers are crossed?
One or two purple alleles in flowering pea plants will result in purple blooms. so there will be 50 percent ratio. This is because one purple gene causes enough pigment to be synthesized to produce all purple flowers.
What is dominant allele?A dominant allele is a variant of a gene that causes a specific trait even when other alleles are present. A functional protein is usually encoded by a dominant allele. Because one copy of the allele produces enough enzyme to furnish a cell with plenty of a given product, it is dominant.
As a result, the purple allele has a dominant role, while the white allele has a recessive role.
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which part of the body never rest
A. nose
B. eye
C. heart
D. brain
Answer:
c.heart
Explanation:
The heart of the body never rests
A club fungus has an erect, above-ground fruiting body and long, branching, underground hyphae.
A club fungus has a thick stem and an umbrella top-shaped head having many irregular-shaped particles spread all over the head.
How do the structures of the fruiting body and hyphae relate to their functions?
Answer:The fruiting body is tall to maximize photosynthesis, while the hyphae are branched to support the release of waste products.
Explanation:I took the test and had the question.
According to the survival training expert in is survival selfish?. What is the reason that some people do not survive life-threatening situations?
They lose their ability to think clearly.life thretening situation is also a highstress situation, stress can disrupt synapse regulation, resulting in the loss of sociability and the avoidance of interactions with others or anything in general.
Do you think survival requires selfishness?Especially if the case is one in which other people are also trying to survive yes.
Some would not nescessarily call it selfishness, it would be more of an act that you have to, I see it kind of like self defense. It is not completely selfish, but a human has the instincts and knowledge to always survive, sometimes at the cost of being called "selfish"
Thus, the loss of sociability and the avoidance of interactions with others or anything in general.
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suppose pollen from one of the suspects was consistent with the pollen found at the crime scene what arguments could the defense attorney present to discredit the evidence
The defense attorney can present the evidence that the pollen could have been transferred there by a pollinators such as bees or a butterflies to discredit the evidence.
What is pollen?Pollen is a tiny piece of matter which is produced by the male part of the flower and which is transferred to the female part of another flower.
Pollen can be transferred from one flower to another by means of pollinators such as bees and butterflies.
Therefore, the defense attorney can present the evidence that the pollen could have been transferred there by a pollinators such as a bee or a butterfly to discredit the evidence.
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Two rabbits mate, each with one dominant gene (f) for black and one recessive gene (f) for white.
how many offspring out of every four will be black? (complete a punnett square to help yourself)
three
two
one
four
thank you to whoever helps <3
Three out of four of their offspring will be white when Two rabbits mate, each with one dominant gene (f) for black and one recessive gene (f) for white. Thus, the correct option is B.
What is law of dominance?A trait is represented by two contrasting factors of a gene in a heterozygous individual, while the homozygous individual has two copies of the identical factors, according to the law of dominance. As a result, the heterozygous rabbit's genotype will be Bb, whereas the homozygous recessive rabbit's genotype will be bb.
FF X ff
║
Ff (F1 generation)
║
Ff X ff (self pollination- F2 generation)
║
Ff, Ff, Ff, ff
3: 1 (black: white)
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What type of feedback is used to
regulate body temperature?
A. positive feedback
B. negative feedback
C. neutral feedback
D. product feedback
Answer:
B
Explanation:
negative feedback is used to regulate feedback
Technological advancement of the society causes energy crisis in different parts of the world. one group of scientists has developed a plan to set up tidal power plants in different parts of the world to reduce the energy crisis. which of these statements best describes a drawback in the scientists' plan?
Limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.
Describes a drawback in the scientists' plan?
The big disadvantage of tidal power is that there are limited installation sites for it. It is expensive as well as the turbines can adversely impact the surrounding ecosystem.
So we can conclude that limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.
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(Here's the table used for context)
Family / parent phenotype cross / phenotype ratio in offspring
1 / gray fur x black fur / 3 gray fur: 2 black fur
2 / gray fur x black fur / 0 gray fur: 5 black fur
3 / black fur x black fur / 1 gray fur: 3 black fur
4 / gray fur x gray fur / 4 gray fur: 0 black fur
Using the allele symbols N and n identify the most likely genotype of the parent wolves in family 1 and the most likely genotypes of the parent wolves in family 2. Be sure to identify which genotype is for the parent with gray fur and which genotype is for the parent with black fur in each family.
ok so, I'm having trouble understanding. i believe that the inheritance pattern could be dominant-recessive, but now I'm not too sure. families 1 and 2 have 5 offspring (which doesn't accommodate a dominant-recessive punnett square as that only accounts for 4 offspring). so i tried thinking of it in percentages instead but (in family 1 for example) 2/5 is 40% and 3/5 is 60% so that doesn't work with the dominant-recessive punnett square where each trait is 25%. so either I'm wrong about the inheritance pattern or I'm just full on . someone please help, i don't think I've ever been this confused in bio.
In complete dominance, heter0zyg0us individuals carry both alleles -dominant and recessive- but only express the dominant phentoype. Cross 1: Nn x nn. Cross 2: NN x nn
What is complete dominance?When the dominant allele completely masks the recessive allele, we talk about complete dominance.
This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait. The dominant allele is hiding the expression of the recessive allele.
What is a punnett square?The Punnett square is a representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
So, according to the provided data,
Cross 1: gray fur x black fur
F1) 3 gray fur: 2 black fur
Cross 2: gray fur x black furF1) 0 gray fur: 5 black fur
By looking at the phenotype of progeny produced by family 2, and assuming complete dominance, we can infere that black is the dominant phenotype. Why is that? because when you crossed a gray animal with a black animal and the whole progeny is black.
So, assuming a diallelic gene coding for the fur color, we will name
N to the dominant allele that codes for blackn to the recessive allele that codes for gray.Possible genotypes and phenotypes
NN ⇒ Black fur ⇒ dominant phentoypeNn ⇒ Black fur ⇒ dominant phentoypenn ⇒ Grey fur ⇒ recessive phentoypeHere what you need to analyze is which phentoypes appear among the progeny and their frequencies to get to interprete the parents' genotype.
If both parents are h0m0zyg0us dominant (NN x NN), the whole progeny expresses the dominant trait (100% NN)If one parent is h0m0zyg0us dominant and the other one heter0zyg0us (NN x Nn), the whole progeny expresses the dominant trait (50%NN and 50%Nn).If one parent is h0m0zyg0us dominant and the other one h0m0zyg0us recessive (NN x nn), the whole progeny expresses the dominant trait (100% Nn).If both parents are heter0zyg0us (Nn x Nn), the offspring will express both phenotypes in a ratio 3:1 (25% NN + 50% Nn and 25% nn).If one parent is h0m0zyg0us recessive and the other one heter0zyg0us (nn x Nn), the offspring will express both phenotypes in a ratio 1:1 (50% Nn and 50% nn).If both parents are h0m0zyg0us recessive (nn x nn), the whole progeny will express the recessive trait (100% nn).Now let us analyze the crosses,
Cross 1: gray fur x black furF1) 3 gray fur: 2 black fur
You crossed a black animal with a gray animal and the offspring expresses both phenotypes. So the black animal (dominant phenotype) must be heter0zyg0us for coat color.
Parents' phenotype) gray and black
Parentals) nn x Nn
Alleles in Gametes) n n N n
Punnett square) N n
n Nn nn
n Nn nn
F1) Genotype
1/2 = 50% of the progeny is expected to be heter0zyg0us, Nn
1/2 = 50% of the progeny is expected to be h0m0zyg0us recessive nn
Phenotype
1/2 = 50% of the progeny is expected to be black -Nn-
1/2 = 50% of the progeny is expected to be gray -nn-
Cross 2: gray fur x black furF1) 0 gray fur: 5 black fur
You crossed a black animal with a gray animal and the offspring expresses only the dominant phenotypes. So the black animal must be h0m0zyg0us dominant for coat color.
Parents' phenotype) gray and black
Parentals) nn x NN
Alleles in Gametes) n n N N
Punnett square) N N
n Nn Nn
n Nn Nn
F1) Genotype
100% of the progeny is expected to be heter0zyg0us, Nn
Phenotype
100% of the progeny is expected to be black -Nn-
Remember that the Punnett square does not give you information about the number of individuals that can be produced. It just provide information about probabilities of getting individuals with certain genotype of phenotype and their frequencies.
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Which of the items shown in the diagram con- tribute to the nitrogen cycle by releasing AND absorbing nitrogen?
The trees and the grazing cows
The sciatic nerve extends from the lower spinal cord to the foot. If a person's sciatic nerve is 0.914 m in length and the speed of an action potential is 107 m/s, how long will it take for a nerve impulse to travel the full distance of this nerve?
Answer:
0.0085420560747664 Seconds
Explanation:
0.914 ÷ 107 = 0.0085420560747664
The time that the nerve will take for a nerve impulse to travel the full distance of this nerve is 0.00854 seconds.
What is a sciatic nerve?Sciatica is caused by a pinched sciatic nerve. The most common cause is a herniated disc in the spine or an overgrowth of bone, known as bone spurs, on the spinal bones.
A tumor can occasionally impose pressure on a nerve. A condition, such as diabetes, can also harm the nerve. The speed of something is how fast the object is moving. It is calculated by the distance divivded by time.
Given, the length of the sciatic nerve is 0.914 m
The speed of an action potential is 107 m/s.
The length is divided by the speed
0.914 / 107 = 0.00854 sec.
Therefore, the full distance of this nerve is 0.00854 seconds.
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If the population of Shanghai increases to 30 billion people, how much land would its people need if the population density is 3,826 people/km2 ?
784109 People per sq. mi land would its people need if the population density is 3,826 people/km2.
What is population density?The density of individuals within a species in a given geographic location is referred to as population density. Data on population density can be used to calculate demographics and examine interactions with ecosystems, human health, and infrastructure.
The population density equation below can be used to calculate the population density of a piece of land:
Population Density = Population/ Area
The residential density is important in determining the people's thinking and culture. Engineers find it vital to forecast population growth in order to develop infrastructure that can support a large population. It is practically impossible to develop a perfect 3D model of any structure that allows the largest number of people to live without this understanding.
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3. The graph below shows the data you collected about bill lengths in two different habitats: pine forests and oak forests.
a) Study the data in the graph and explain how the bill length of the jays is affected by the habitat where they live.
pls answer fast urgent answer
Answer:
The pine jays
Explanation:
Its because the oak jays eat the hard round luscious fecal balls of the pine jays which causes them to have shorter bills.
The pine jays do not eat the feces of the oak jays instead they eat the long shiny smooth feces of the oak squirrels.
Hope this helped.
What kind of effect can a chromosomal change can have on an organism?
Opositive, negative, or no effect
Opositive or no effect
Onegative effect
Opositive or negative effect
Answer:
positive, negative, or no effect
Explanation:
The kind of effect that a chromosomal change can have on an organism is either positive, negative, or no effect.
The 3 main chromosomal disorders seen in humans are :
Down's SyndromeKlinefelter's SyndromeTurner's SyndromeAnswer:
Answer is A
Explanation:
Just trust me bro
what type of protein is often used to cary other molecules
Answer:
Globular proteins
Explanation:
They play many biological roles, including acting as enzymes, hormones, immunoglobulins, and transport molecules
Answer: The type of protein that is often used to carry other molecules is Globular
Explanation:
Who are the consumers of the organism represented by the blue arrow?
Food web showing several different food chains. The blue arrow is pointing to an image of algae which has arrows pointing to images of a large mouth bass and a wood duck which both have arrows pointing to an image of a red tailed hawk.
The large-mouth bass and the wood duck
The large-mouth bass and the red-tailed hawk
The wood duck and the red-tailed hawk
The wood duck and the meadow vole
Question 4(Multiple Choice Worth 3 points)
(04.01 MC)
What trophic level do herbivores occupy in a food chain?
Primary consumer
Producer
Secondary consumer
Decomposer
[tex]\large{\underline{\underline{\pmb{\frak {\color {red}{Question:}}}}}}[/tex]
[tex] \sf \red{What \: trophic \: level \: do \: herbivores \: occupy \: in \: a \: food \: chain?}[/tex]
[tex]\large{\underline{\underline{\pmb{\frak {\color {blue}{Answer:}}}}}}[/tex]
[tex]\green\star[/tex]Primary consumer
[tex]\pink\star[/tex]Explanation:
Let us take an example of chain. Plants are producer, they produce grass, after then it comes primary consumer like cow,goat etc. Then it comes Secondary comsumer like us, we human take milk or flesh from it. And at last it comes to decomposer which are micro organism that absorb the wastes in the soil and make the soil fertile.
Thus, herbivores comes under Primary consumer.
[tex] \boxed{\huge \frak \red{brainlysamurai}}[/tex]
Which would have more effect on the evolution of plants and animals?
Answer:
E. onset of an ice age
Explanation:
Why is astrology considered a pseudoscience?
a. it requires hypothesis testing.
b. it is based on empirical evidence.
c.it lacks controlled experiments.
d.it rejects unsupported claims.
1.1.5 The phase of photosynthesis where chlorophyll molecules Convert radiant energy in two Chemical energy A. Light Phase B. Dark Phase C. Light intensity D. Temperature
without a gallbladder, a person would be unable to produce bile by __________.
Answer:
its false
Explanation:
edge 2023
A 45 year old female
with a history of dieting
continues to gain weight,
complains
of feeling cold
and is often tired
Answer:
Iron deficiency (anemia)
Hormonal and lifestyle differences like pregnancy, menstruation, and menopause mean that women need more iron than men in their diet, but few women actually get as much as they need. The result—anemia's—most common symptoms include fatigue and weakness.
Explanation:
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What relationships exists between frogs and fishes in a pod
Answer:
The relationship between frogs and fishes in a pod is predation.
What scientific term describes differences in characteristics between individuals of
a species?
[1 mark]
Answer:
Variation is the term you seek.
Which type of virus is an exception to the central dogma?.
Answer:
SARS-CoV-2 is a highly relevant example of information transfer that does not conform to the Central Dogma.
Explanation:
Which members of an ecosystem are part of the energy flow?.
Answer:
When it comes to the flow of energy in ecosystems there are two types of organisms: producers and consumers. Plants are a common example of producers in all populations. They are able to convert carbon dioxide into oxygen and glucose, a common sugar consumed by most organisms.
Explanation:
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Where in the cell cycle is dna polymerase most active.
Answer:
DNA polymerase takes place mostly in the S phase of the interphase since its responsible for DNA replication.
The S phase of the interphase is the most active. The S phase is where it is responsible for DNA replication. Since it is responsible for cell replication, it the activity there is at it's maximum.
HAVE A NICE DAY!
In which phase of mitosis does the nuclear envelope reform?.
what best discribes a possible negative impact of irrigation of farmland
Answer:
Food can be produced in dry areas.
Explanation:
This can be rice.