if two populations of the same species have different mating seasons, one in fall and the other in spring, this may lead to a speciation event due to allopatric speciation.
Allopatric speciation, also known as geographic speciation, vicariant speciation, is a type of evolutionary change that occurs when biological populations become geographically isolated from one another to the point where gene flow is prevented or hampered.
Allopatric speciation takes place when a species divides into two distinct groups that are geographically separated from one another. A physical barrier, such as a mountain range or a waterway, prevents them from breeding with one another.
Allopatric speciation, also known as geographic speciation, arises when biological populations of a single species become secluded due to geographical changes like mountain formation or social changes like emigration.
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What was the order of steps taken by the United States to clean the air?
enact the Clean Air Act, establish funding to study how to clean the air, create the EPA, and find cost-effective ways to keep the air clean
establish funding to study how to clean the air, enact the Clean Air Act, create the EPA, and find cost-effective ways to keep the air clean
find cost-effective ways to keep the air clean, establish funding to study how to clean the air, create the EPA, and enact the Clean Air Act
create the EPA, enact the Clean Air Act, find cost-effective ways to keep the air clean, and establish funding to study how to clean the air
Answer:
A
Explanation:
I took the test and got the answer right.
Answer:
Explanation:
a
A cell membrane is composed of a lipid bilayer in which many kinds of proteins are embedded. These proteins use energy to actively transport certain particles into and out of the cell.
Which example BEST illustrates the condition in which molecules move across the cell membrane through active transport?
A. When molecules need to move from an area of lower concentration to an area of higher concentration.
B. When the cell wall is damaged or genetically modified and molecules cannot enter or leave the cell.
C. When molecules need to move from an area of higher concentration to an area of lower concentration.
D. When the amount of water is higher inside of the cell as compared to the area surrounding the cell.
Answer:
when molecules need to move from an area of lower concentration to an area of higher concentration
what is the biologist ?
Answer:an expert in or student of the branch of science concerning living organisms
Explanation:
if a strand of DNA has the sequence ATGCGATCCGC, then the sequence of the MRNA molecule transcribed from it is
Answer:
DNA: ATGCGATCCGC
mRNA: UACGCUAGGCG
Explanation:
The deoxyribonucleic acid (DNA) is a double-stranded helix, where each strand is composed of four nitrogenous bases: Adenine (A), Thymine (T), Guanine (G) and Cytosine (C). The two strands are held together by hydrogen bonds and they interact in the following way: Adenine (A) always pairs with Thymine (T) through two hydrogen bonds, while Guanine (G) always pairs with Cytosine (C) through three hydrogen bonds. During transcription, a DNA strand of the double helix DNA molecule is used as template to synthesize a complementary RNA molecule, usually, a messenger RNA (mRNA) which is then used to create a protein by the process of translation. Moreover, also during transcription, Thymine (T) bases are replaced by Uracil (U) bases in the RNA molecule.
Why should everyone be encouraged to take an HIV blood test?
to slow down and prevent it's spread
Explanation:
testing is the only way to know for sure if you have HIV. Knowing your status means you keep yourself and your sexual partners healthy.
8. Which of the following correctly shows one path that energy would
flow through this ecosystem?
Grasses -- Termite -- Monkey -- Eagle
Hyena -- Mongoose - Mouse - Grasses
Grasses - Termite - Grasshopper -- Monkey
Acadia trees - Giraffe
-- Lion -- Vulture
grassses -- Termite -- Monkey -- Eagle
state three functions of the cell membrane
Answer: A Physical Barrier. ...
Selective Permeability. ...
Endocytosis and Exocytosis. ...
Cell Signaling. ...
Phospholipids. ...
Proteins. ...
Carbohydrates. ...
Fluid Mosaic Model.
Explanation: Have a good rest of the day.
what does the government consider before approving a building project?
Answer: Before you build your home, it's important to familiarize yourself with ... number) and make sure your parcel is an approved building site before you build. ... city hall or mayor's office, department of housing, or other local government office.
Explanation:
What is the function of the digestive system?
A. Removal of liquid waste
B. Maintain body temperature and hormone levels
C. Delivers food to your brain
D. Changes food into minerals and nutrients that are absorbed into
bloodstream
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Explain how running water, groundwater, waves, and glaciers cause erosion and deposition.
Answer:
Water flowing over Earth's surface or underground causes erosion and deposition. Water flowing over a steeper slope moves faster and causes more erosion. Erosion and deposition by slow-flowing rivers create broad floodplains and meanders. Deposition by streams and rivers may form alluvial fans and deltas.
Explanation:
hope it helps
Answer:
Running Water I: Rivers, Erosion and Deposition ... Geophysicists use seismic wave studies, variations in temperature, magnetic fields, gravity, and computer simulations to create models of deep structures. The program provides images of glaciers and glacial landforms such as moraines
Explanation:
hope it helped!!
1) Ultimately, where does all energy come from that plants and animals use? A: Coal B: Natural gas C: Oil D: The sun
when water vapor changes to water, evaporation takes place
Answer:
Explanation:
In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. Once evaporated, a molecule of water vapor spends about ten days in the air.
what are some similarities for prophase and telophase
Answer:
Both prophase and telophase have a complete set of chromosomes and organelles.
A plant species live in an area with limited sun.Which physiology adaptation would be most useful to the plant?
Answer:
The correct answer is - large leaves.
Explanation:
Chlorophyll is the green pigment present in the chloroplast found in the plant cells that is used to make food or glucose from sunlight. These pigments are present in a high amount on the leaves of the plant.
If a plant lives in an area with limited sun then there will be a limited amount of sunlight for that plants adapt accordingly and big leaves are one of them. Big leaves have more chlorophyll and the more the pigment higher the amount of energy is trapped by the plant for food production.
6. How can a mutation be beneficial to a bacterium?
Answer: Some mutations have a positive effect on the organism in which they occur. They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. ... The mutations lead to antibiotic-resistant strains of bacteria. brainliest?
Explanation:
HELP 100 points I WILL GET RID OF ANSWER IF NOT GOOD
The two major sources of energy for the rock cycle are the sun, which provides energy for surface processes such as weathering, erosion, and transport, and the Earth's internal heat provides energy for processes like subduction, melting, and metamorphism. And Magma, when it is allowed to cool, it crystallizes, much the same way that ice crystals develop when water is cooled. We see this process occurring in places like Iceland, where magma erupts out of a volcano and cools on the surface of the Earth, forming a rock called basalt on the flanks of the volcano
----------------------------------------
how each source of energy causes the rock to change forms:
Over many thousands of years, energy from the Sun moves the wind and water at the Earth’s surface with enough force to break rocks apart into sand and other types of sediment. When sediment is buried and cemented together, it becomes a sedimentary rock such as sandstone or shale.
Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly.
FILL IN THE BLANK PLS HELP I HAVE 20 MINUTES TO SUMBIT THIS!!
Answer: 1) Cell walls
2) chloroplast
3) Nucleus
4) ?
5)?
7 last one) Vacuole
6) Mitochondria
Explanation:
Neutrophils can sometimes kill human cells along with pathogens when they release the toxic contents of their granules into the surrounding tissue. Likewise, natural killer cells target human cells for destruction. Explain why it is advantageous for the immune system to have cells that can kill human cells as well as pathogens.
Answer:
Because Neutrophils has many other functions like
Neutrophils are the most abundant granulocytes that makeup about 40% of white blood cells and 60% of the immune cells in the blood.Neutrophils are the first responders to infection, and they phagocytose bacteria into phagosomes before hydrolyzing and destroying them.These cells also secrete a range of proteins that have antimicrobial effects as well as tissue remodeling potential.Neutrophils have a short lifespan and thus destroy themselves during the degradation of foreign invaders. New neutrophils are then produced continuously in the bone marrow.The neutrophils of another subpopulation, cager neutrophils, perform a transport function of delivering foreign particles to the target site for the action of killer neutrophils.Like wise Natural killer (NK) cells are effector lymphocytes of the innate immune system that control several types of tumors and microbial infections by limiting their spread and subsequent tissue damage.
Rates of extinction tend to be higher on islands than on the mainland.
O True
O False
Answer:
True.
Explanation:
In biogeography, extinction is the ending of the existence of some species or other taxonomic group. It is a normal natural phenomenon. Species are becoming extinct because the factors that keep the population small, such as diseases or predators, are increasing, because their living environment is changing drastically due to climate change, for example, or because competition is increasing.
Thus, if these species are enclosed in small and dead-end territories, such as an island, their extinction will be easier, since they will not have the possibility of migrating (except for birds) or expanding territorially.
A diploid cell (2N) in G1 phase of the cell cycle has how many alleles of each gene?
Please help
Answer:
46 chromosomes
Explanation:
I. G1 phase (Gap 1) - Cellular contents excluding the chromosomes, are duplicated. II. S phase (DNA Synthesis) - Each of the 46 chromosomes is duplicated by the cell.
The _____________ receives blood from the atrium and pumps it out of the heart.
Ventricles receive blood from the atrium and pump it out of the heart. The left ventricle pumps oxygenated blood to different parts of the body.
How does the heart pump blood?The heart has four chambers, such as the upper two atriums and the lower two ventricles. The right side of the heart holds the deoxygenated blood, and the left side holds the oxygenated blood.
The deoxygenated blood from different parts of the body is poured into the right atrium through the superior vena cava, inferior vena cava, and coronary sinus. Then, from the atrium, blood moves to the ventricle through the atrioventricular opening.
From the right ventricle, blood moves to the lungs for oxygenation through the pulmonary artery. In the lungs, the oxygenation of blood takes place, and the oxygenated blood comes to the left atrium. From the left atrium, the oxygenated blood comes to the left ventricle. From the left ventricle, blood goes to different body parts through systemic arteries.
Hence, the ventricles receive blood from the atrium and pump it out of the heart.
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_____% of species present during the Permian survived into the Triassic.
Answer: 30
Explanation:
according to darwin’s on the origin of species, what four factors
Answer:
(1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment.
Explanation:
Technology affects the environment in many ways. Which negative impact is NOT due to advances in technology?
A) toxic waste
B) global warming
C) habitat destruction
D) increase in natural disasters
Answer:
d
Explanation:
Im pretty sure that the answer is d because how could technology cause more NATURAL disasters and also i took the USATestprep
**HURRY** Because of convection currents, wind (air) moves from high pressure areas to low pressure areas. True or false?
In pea plants, two stem lengths are possible: tall (T) and dwarf (t). Tall is dominant to dwarf. a. In a purebred tall plant, what gametes are possible? ___________________ b. In a purebred dwarf plant, what gametes are possible? ___________________ c. What is the genotype of a purebred tall plant? ___________________ d. What is the genotype of a purebred dwarf plant?
Answer:
a. only T gametes
b. only t gametes
c. TT
d. tt
Explanation:
This question involves a single gene coding for stem length in pea plant. The allele for tall stem length (T) is dominant to dwarf stem length (t).
- A purebred is an organism that will only transfer one type of phenotype to its offspring or produce only one type of GAMETE. Hence, to do this, a purebred must have a homzygous genotype. According to this question;
a. A purebred tall plant (TT) will produce only 'T' gametes.
b. A purebred dwarf plant (tt) will produce only 't' gametes.
c. The genotype of a purebred tall plant will be 'TT'
d. The genotype of a purebred dwarf plant will be 'tt'
Biotic factors are the _____things in an environment? Multicellular, Eukaryotic, living or used to be living, Non living
Answer:
living
Explanation:
Biotic factors are the living parts of an ecosystem. Because of the way ecosystems work – as complex systems of competition and cooperation, where the action of every life form can effect all the others – any living thing within an ecosystem can be considered a biotic factor. Biotic factors such as soil bacteria, plant life, top predators, and polluters can all profoundly shape which organisms can live in an ecosystems and what survival strategies they use. Eukaryotic unicellular living beings Living beings that are made up of one single eukaryotic
protest bushes,palm trees and maize plants are all flowering plants ?
Answer:
The great centres of palm distribution are in America and in Asia from India to Japan and south to Australia and the islands of the Pacific and Indian oceans, with Africa and Madagascar as a third but much less important palm region.
The ocean is the largest reservoir of carbon on Earth. Which of the following would most likely store carbon for the longest amount of time?
Calcium carbonate shells of marine organisms, like coral, oysters, and clams
Dissolved CO2 in surface ocean water
Dissolved CO2 in deep ocean water
Carbon stored in the rocks
Carbon is stored for the longest amount of time as Calcium carbonate shells of marine organisms, like coral, oysters, and clams.
What is the carbon cycle?The carbon cycle is a cycle of how carbon is recycled between the atmosphere and the living and non-living part of the earth.
The carbon reservoir of the ocean forms part of the carbon cycle.
Carbon is stored in the ocean as calcium carbonate shells of marine organisms, like coral, oysters, and clams.
This is the longest time storage form of carbon in the ocean.
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None of the above
5) Which of the following statements is true?
a. An ecosystem is an area where abiotic components (from organic or living source) and
biotic components (from inorganic or non-living source) interact between interdependent
subsystems within a spatially regulated organisation using energy from the sun and a
b. An ecosystem is an area where biotic components (from inorganic or living source) and
abiotic components (from organic or non-living source) interact between dependent
subsystems within a spatially regulated organisation using energy from the sun and a
variety of raw materials.
variety of raw materials.
C. An ecosystem is an area where biotic components (from organic or non-living source)
and abiotic components (from inorganic or living source) interact between interdependent
subsystems within a spatially regulated organisation using energy from the sun and a
variety of raw materials.
d. An ecosystem is an area where biotic components (from organic or living source) and
abiotic components (from inorganic or non-living source) interact between interdependent
subsystems within a spatially regulated organisation using energy from the sun and a
variety of raw materials.
e. An ecosystem is an area where biotic components (from organic or living source) and
abiotic components (from organic or living source) interact between interested dependent
subsystems within a spatially regulated organisation using energy from the sun and a
variety of raw materials.
Answer:
E
Explanation: