A bird species lives on a tiny island in the Pacific Ocean. Due to a single mutation some individuals start breeding in the fall and not in the spring, like all other birds. As a result, these two populations evolve into two separate species. This is an example of: reproductive barrier.
The mechanism by which two species cannot breed with one another because of the differences between the species is known as the reproductive barrier.
There are two categories of reproductive barrier separation:
Periodic mechanismtemporary seclusionWhen members of various species coexist in a region, exhibit the same reproductive habits, and have compatible gametes, seasonal or temporal isolation occurs.
Seasonal variations prevent the reproduction of the birds mentioned in the inquiry. Due to the fact that one of the bird species mates in the spring and the other breeds in the fall, two bird species living together cannot reproduce. This is a result of speciation.
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ARTICLE ABOUT CHARACTERISTICS of
Gaseous EXCHANGE
Answer:
Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
Gases are constantly consumed and produced by cellular and metabolic reactions in most living things, so an efficient system for gas exchange between, ultimately, the interior of the cell(s) and the external environment is required. Small, particularly unicellular organisms, such as bacteria and protozoa, have a high surface-area to volume ratio. In these creatures the gas exchange membrane is typically the cell membrane. Some small multicellular organisms, such as flatworms, are also able to perform sufficient gas exchange across the skin or cuticle that surrounds their bodies. However, in most larger organisms, which have a small surface-area to volume ratios, specialised structures with convoluted surfaces such as gills, pulmonary alveoli and spongy mesophyll provide the large area needed for effective gas exchange. These convoluted surfaces may sometimes be internalised into the body of the organism. This is the case with the alveoli, which form the inner surface of the mammalian lung, the spongy mesophyll, which is found inside the leaves of some kinds of plant, or the gills of those molluscs that have them, which are found in the mantle cavity.
Explanation:
I hope this helps u ^_^
How might human anatomy be different today if the forerunners of humans had never inhabited the forest canopy
Explanation:
Humans would likely have never gained opposable thumbs because there would be no need to grasp as well as the shoulders because there would be no reason to move our arms in any direction.
Which cell is unspecialized ?
Deer mice are usually dark brown and live in forests with dark soil. However, the deer mice in the Sand Hills of Nebraska are lighter brown and live in an area with light, sandy soil.
Based on this information, what ,begin emphasis,most,end emphasis, likely caused the change in the Sand Hills deer mice?
Answer options with 4 options
A.
Lighter colored mice were preferred by females.
B.
Lighter colored mice came from snowy habitats in the north.
C.
Lighter colored mice had more dominant genes in their new habitat.
D.
Lighter colored mice were more likely to avoid predators and to reproduce.
Lighter colored mice were more likely to avoid predators and to reproduce. Therefore, option (D) is correct.
The lighter brown coloration of the deer mice in the Sand Hills of Nebraska is likely an adaptation that provides them with a survival advantage in their specific habitat. The light, sandy soil in the area may offer better camouflage for lighter colored mice, making them less visible to predators and increasing their chances of survival.
As a result, these mice would have a higher likelihood of successfully reproducing and passing on their lighter coloration traits to future generations.
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Which scientific discipline is correctly matched to a contribution to society?
The options are;
A) biology; theory of relativity
B) geology; theory of continental drift
C) ecology; discovering new elements
D) astronomy; developing quantum mechanics
Answer:
B) geology; theory of continental drift
Explanation:
Looking at the options;
-theory of relativity is a topic in physics originated by Einstein. Thus, it is matched to physics and not biology.
- theory of continental drifts are related to plate tectonics where it explains how continents shift position on Earth's surface. This is a branch of Geography and is thus correctly matched.
- discovering new elements is a topic under chemistry and not ecology. Thus, this is not matched correctly.
-developing quantum mechanics is a topic in physics that deals with the relationship between energy and matterwith respect to atomic and subatomic scale. Thus, it is not well matched.
Therefore correct answer is option B
The process of growing and caring for animals and plants to sustain life isOnondegradableO pollutionO sustainabilityO agriculture
The process of growing and caring for animals and plants to sustain life is sustainability. It includes both animals and plants, and the aim of it is to sustain life, not for any benefit.
ormed by waves eroding less - resistant rocks along the shore
Costal Erosion is the form of erosion that is caused when waves of seas hit the rocks on the shore.
What is Erosion ?The removal of soil, rock, or dissolved material from one area on the Earth's crust and subsequent transport to another region for deposition are known as erosional processes. Erosion differs from weathering, which is a static process.
Earthen materials are worn away during erosion, a geological process in which they are moved by wind or water. Weathering, a related process that does not involve movement, dissolves or breaks down rock.
When materials like boulders and stones carried by waves strike and knock against one other, they are said to be attritionally worn away. Sand and rounded beach pebbles are created via the wear and tear of these materials. One of the most obvious signs of coastal erosion is the formation of sea cliffs.
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What type of tissue surrounds the slip disc with age epithelial tissue?
Answer:
It is Cartilage.
D. Suggested Enrichment/Reinforcement Activity Directions: Write evidences (at least four sentences) to support this general statement Social media is useful
EXPLANATION: Social media is a communications technology that bridges different peoples together using the Internet and the world wide web. This term was first coined in 1994 by a Japanese magazine and since then has been used to describe different websites and cellular phone applications. The social media apps range from games, productivity, business, and other platforms for different uses.
ANSWER:
PREMISE: SOCIAL MEDIA IS USEFUL
How is it useful?
> connects people even if they are apart
> learn new things from other peoples' experiences and knowledge
> helps in business, education, and government services
> helps in the organization of thoughts, tasks, and communication
A neurotransmitter from a presynaptic neuron causes an inhibitory postsynaptic signal (IPSP) in the postysynaptic neuron. Which if the following events will occur FIRST1Sodium-gated ligand channels open2Potassium ligand-gated channels open3An action potential is initiated in the postsynaptic neuron4The postsynaptic neuron will hyperpolarize
A neurotransmitter from a presynaptic neuron causes an inhibitory postsynaptic potentials (IPSPs), in the postysynaptic neuron. The following event will occur first : Potassium ligand-gated channels open.
Inhibitory postsynaptic potentials or IPSPs, on the other hand, are triggered by the opening of chloride channels. The equilibrium potential of chloride is -65 mV. Thus, if a neuron is resting at −60 mV, chloride channels will flow into the cell due to the electrochemical gradient when the chloride channels open.
As an inhibitory neurotransmitter, GABA normally causes hyperpolarization of postsynaptic neurons, producing inhibitory postsynaptic potentials (IPSPs), whereas glutamate causes depolarization of postsynaptic neurons, producing excitatory postsynaptic potentials ( EPSP).
IPSPs are generated when inhibitory presynaptic cells attach to dendrites and initiate action potentials. Presynaptic inhibitory neurons are involved in the release of specific neurotransmitters.
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Which of the following statements best describes the relationship between genes and their outcomes?
Every gene influences a single trait.
The outcome of a gene is affected by the environment of the cells and the timing of gene expression.
Similar genes produce the same outcome in every individual.
Every gene can be linked to one specific, predictable outcome.
Answer:
B.
Explanation:
Every gene influences a single trait-Yes, but very general because multiple genes can influence just one.
Similar genes produce the same outcome in every individual-False.
Every gene can be linked to one specific, predictable outcome-Depending on the environment and other factors
4. The ATP yield from 2 moles of mitochondrial NADH under aerobic conditions in a eukaryotic cell would be: which option is correct a) 1 mole of ATP b) 2 moles of ATP c) 3 moles of ATP d) 4 moles of ATP e) 6 moles of ATP
The ATP yield from 2 moles of mitochondrial NADH under aerobic conditions in a eukaryotic cell is approximately 4 moles of ATP.
During oxidative phosphorylation, each mole of NADH can generate around 2.5 to 3 moles of ATP. Therefore, for 2 moles of NADH, the total ATP production would be in the range of 4 to 6 moles of ATP. While the more precise estimate falls within the 4 to 6 moles range, the closest option provided is 4 moles of ATP. It is important to note that the exact ATP yield can vary depending on factors such as the efficiency of the electron transport chain and the specific conditions within the cell.Since there are 2 moles of mitochondrial NADH, the total ATP yield would be around 4 to 6 moles of ATP. However, the most accurate option among the given choices is 4 moles of ATP.
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What is what is the biggest change in leg anatomy from the dawn horse to modern horse
Answer:
The modern horse, in addition to having much longer legs, has developed hooves in place of hand/foot bones.
Explanation:
Just read the text :)
which of the following is a difference between DNA and RNA?
Answer:
C is best answer
Explanation:
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Is gooseberry monocot or dicot
Answer: dicot
Explanation: I think
During cytokinesis, the cell membrane ________ until two daughter cells separate completely.
A
expands
B
dissolves
C
pinches in
D
spins around
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After a tadpole develops legs and a wide mouth, it is called a...
Answer:
It is called a froglet
Complete the sentence. Lobbyists of ______________ use access to political leaders and other federal members to attempt to influence environmental policy.
the courts
Congress
interest groups
the presidency
Answer:
interest groups is the correct answer
hope this helps:)
Lobbyists of interest groups use access to political leaders and other federal members to attempt to influence environmental policy. Thus, the correct option is C.
What is Environmental policy?An Environmental policy may be characterized as any standard through which a government, corporation, or other public or private organization associates the concerns of human activities on the environment.
A person who is employed, contracts for economic considerations, and receives payment interferes with the political leaders and other federal members with the help of their interest groups and significantly attempts to influence environmental policy.
It is the method that is systematically approached by such lobbyists to make alterations in the environmental policies either directly or indirectly.
Therefore, lobbyists of interest groups use access to political leaders and other federal members to attempt to influence environmental policy. Thus, the correct option is C.
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Compare and contrast a fossil with a trace fossil
A sledgehammer has a mass of 3.5 kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of 4.0(m)/(s^(2)) ?
Record your answer in the boxes below. Be sure to use the correct place value.
Force is equal to mass multiplies with the acceleration.
So, the correct answer is 14 N.
What is Force?Force is the push or pull of an object which cause changes in velocity or to accelerate with mass. It is a vector quantity which means it has direction as well as magnitude.
A force is usually denoted by the symbol F. Below equation is derived from the second Law of Newton.
F = m·a
where F = force, m = mass, and a = acceleration.
For above example,
Mass= 3.5 kg
Acceleration (a)= 4\(m/s^{2}\)
so, F=3.5*4= 14N
The SI unit of force is the Newton (N). Other units of force include dyne, kilogram-force (kilopond), poundal and pound-force.
Thus, Force is equal to mass multiplies with the acceleration.
So, the correct answer is 14 N.
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What family of KBOs does Orcus belong to?
Answer:
Pluto
Explanation:
Orcus is a plutino, a trans-Neptunian object that is locked in a 2:3 resonance with the ice giant Neptune, making two revolutions around the sun to every three of Neptunes. This is much as pluto, except that the phase of Orcus's orbit is opposite from Pluto's: Orcus is at aphelion when pluto is at aphelion when Pluto is at perihelion and vice versa. This was a major consideration in selecting its name, as deity Orcus was the Etruscan equivalent of the Roman Pluto, and later becamean alternate name for Pluto
Family of KBOs orcuas belongs to plutino, it is a plutino object revolves around the sun.
What is Family of KBOs?Orcus is a plutino, a trans-Neptunian object that revolves about the sun twice as often as Neptune and is locked in a 2:3 resonance with it.
This is quite similar to Pluto, but Orcus's orbital phase is the opposite of Pluto's, Orcus is at aphelion while Pluto is at perihelion, and vice versa.
This was a key factor in naming it since the deity Orcus was the Etruscan counterpart to the Roman Pluto and eventually developed into a different name for Pluto.
Therefore, revolves around the sun twice as often as Neptune is the plutino is a orcus in the family of KBOs.
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Do dead trees have cells
state and explain five uses of insects
Answer:
They help our eco system
Explanation:
PROVIDERS
Insects are in nearly every food chain. Many larger animals—birds, bats, amphibians, and fish—eat insects before they in turn are eaten by predators. The dearth of insects is suspected to be a leading cause of recent declines in bird populations.
DECOMPOSERS
Waste-eating insects unlock nutrients for use by the ecosystem that would otherwise stagnate in dung, dead plants, and carrion. Dung beetles process parasite- breeding and grass-killing cattle dung in 23 months versus the 28 it would otherwise take.
PEST CONTROLLERS
By feeding on crop-threatening pests, predatory insects perform the role of pesticides without chemicals. This cuts pest-control costs and increases yields, saving agricultural industries billions of dollars every year—while reducing toxic pesticide residue on crops.
POLLINATORS
Nearly 90 percent of flowering plant species and 75 percent of crop plant species depend on pollination by animals—mostly insects. Overall, one out of every three bites of food humans eat relies on animal pollination in the production process.
SOIL ENGINEERS
Termites (and ants) can trans- form soil in hot, dry climates. Their tunneling aerates hard ground, helping it retain water and adding nutrients. In some regions, the introduction of termites has turned infertile land into cropland within a year.
Answer:
Pollination, Food, Silk, Dyes, Dermestids for cleaning skeletons.
Explanation:
Pollination. Honeybees are among the most important of pollinators, and their efforts result in about 80% of all pollination in the United States.
Food. Honey is made by insects and can be consumed by humans.
Silk. Most silk is produced from the cocoons of the Silkworm.
Dyes. Many insects provide dyes that are used in cosmetics and for coloring cakes, medicines and beverages.
Dermestids for cleaning skeletons. Carpet beetles feed on almost anything organic and have been used in museums by technicians to clean the skeletons of mammals.
What should be the new hypothesis in the strange case of beriberi ?
Answer:
Beriberi is a disease caused by lack of vitamin B-1 called thiamine disease in the body.
what usually accompanies a cold spell in minnesota?
Describe way in which plants are adapted to swed dispersal by animals give an example
Some seeds feature barbs or hooks that cling to an animal's skin, fur, or feathers. Birds can carry away the sticky seeds of plants like pittosporum.
How do plants adapt to animal seed dispersal?Seeds from plants that rely on animals for distribution are made to fit either within or outside of the animal. Burr- or hook-shaped seeds can cling to an animal's fur. Plants give seeds that are carried internally an enticing fruit pulp reward in exchange for the journey.
What kind of animal dispersal are examples?Mangoes, guavas, breadfruit, carob, and several fig species are some examples. Aardvarks and the desert melon (Cucumis humifructus) share a symbiotic connection in South Africa, where the mammals consume the fruit for food.
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An analogy is a relationship between two pairs of terms or phrases written as a : b :: c : d. Knowing this, problem 22 says:
THEORY : TESTED HYPOTHESIS ::
With the following answers:
A) REJECTION : PREDICTION
B) EVIDENCE : REJECTION
C) PREDICTION : HYPOTHESIS
D) DISAGREE : AGREE
A hypothesis is a claim or prediction of what the researcher expects to occur. The theory is a group of testes hypothesis that correctly argument and provide support to explain facts. Option C) prediction : hypothesis.
What are a theory and a hypothesis?A theory is a group of tested hypotheses.It refers to a knowledge that was contrasted in several ways and is used to organize and understand observations.
It is a logical group of evidence, argumentation, and demonstrations that constitute a unified system.
A hypothesis is a scientific conjecture, not verified, that requires corroboration.It is a possibility, not a fact. It is a claim of how it works a relationship between two or more variables.
The researcher hypothesizes to predict what is going on or what is expected to occur.
According to this framwork, we could assume that the analogy would be,
THEORY : TESTED HYPOTHESIS :: PREDICTION : HYPOTHESIS
Option C) is correct.
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blank is stored in a fossil fuel and released in the form of kinetic energy when burned
Answer:
Chemical energy.
Explanation:
Chemical energy is stored in a fossil fuel and released in the form of kinetic energy when burned
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4. Determine the number of valence electrons that oxygen has. A. 2 B. 4 C. 6 D. 9
In meiosis when the cells divide again, what happens to the number of chromosomes?