2 and 3 please !!!!!

One possible form of a gene that codes for a particular trait is known as _______.

lina2011 [118]

The correct answer is allele.
I hope I helped!

3 0

3 years ago

What will occur if a species is divided into two groups and allowed to reproduce in different environments for many generations?

bonufazy [111]

Answer:

The original species will diverge into two new species. It will occur speciation. It will occur some sort of allopatric speciation.

Explanation:

When the original species is divided and placed under different environments, where they can reproduce for many generations, many changes or mutations will occur in each group. These changes will depend on each group´s environment and its ecological pressures and will lead to divergence. Pressures act on individuals and make them adapt to the new environmental conditions. Generation after generation, the genotype of individuals will increase the fitness to survive and reproduce. The fixation of mutations will increase the difference among both groups, up to the diverging point into two new species.

The biological concept of species states that individuals of the same species can reproduce because they have a genetic reservoir in common: many genetic variants.

Genetic variability is the measure of a species organism´s tendency to differentiate. In genetic variability, individuals of the same species are not identical. They are recognizable as members of the same species, but they differ in shape, function, and behavior. There exist variations among individuals of the same species.

Genetic variability originates from mutations, recombinations, and karyotype alterations. It allows or makes possible evolution.

Allopatric speciation consists of the geographic separation of a continuous genetic background giving place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.

The process of allopatric speciation involves different steps:

• The emergence of the barrier.

• Interruption in the genetic interchange

• The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation.

• Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears.

• Prezigotic isolation mechanisms favored by selection once occurs a secondary contact between the new species in formation.

6 0

2 years ago

WHICH PROPERTIES OF A SOLID ARE SHARED WITH A LIQUID BUT NOT WITH GAS

Gnesinka [82]

The property of a solid which is shared with liquid but not with gas is that both have definite volume.

5 0

2 years ago

What is the difference between the terms MATTER and ELEMENT?

madam [21]

Answer:

What is the difference between the terms Matter and Element?

Anything that occupies space and has mass is called matter. It can be solid, liquid or gas.
Element is smallest classification of matter, which cannot be sub-divided into simpler components by chemical means.

What is an atom?

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

What are the 4 most common atoms to the human body?

The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

What are molecules?

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.

What is a chemical reaction?

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.

According to the Rules of Atoms, will the carbon in carbon dioxide be around in a million years? How likely is it the carbon dioxide molecule will be around? What is your reasoning?

I don't know, this one you can answer yourself

Explanation:

4 0

2 years ago

When a bird eats a small insect it can be considered a secondary consumer but what is the bird considered as when it eats seeds?

IRISSAK [1]

If the bird eats a small insect that ate the seeds and is a Secondary consumer, then it was relying on another organism for food. Where as the Primary consumer eats what grows and doesn't really on another organism for food. So the answer would be Primary Consumer.

5 0

3 years ago

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