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3 years ago

Describe the circumstances of a solar eclipse.

Biology

1 answer:

dangina [55]3 years ago

3 0

A solar eclipse happens when the Moon passes in front of the Sun and casts a shadow across Earth.

For a total eclipse to take place, the sun, moon and Earth must be in a direct line. The second type of solar eclipse is a partial solar eclipse. This happens when the sun, moon and Earth are not exactly lined up. The sun appears to have a dark shadow on only a small part of its surface.

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Identify the evolutionary forces that can cause allele frequencies to change from one generation to the next.

Irina-Kira [14]

Allele frequencies to change from one generation to the next.-

B. Mutation; C. Random genetic drift; D. Migration; F. Natural selection

Selection, mutation, migration, and genetic drift are the mechanisms that effect changes in allele frequencies.
When one or more of these forces are acting, the population violates Hardy-Weinberg assumptions, and evolution occurs.

Why do allele frequencies change from one generation to the next?

Random selection: Allele frequencies may fluctuate from one generation to the next when people with particular genotypes outlive those with different genotypes.

No mutation: Allele frequencies may fluctuate from one generation to the next if new alleles are produced via mutation or if alleles mutate at different rates.

What are 5 factors that cause changes in allele frequency?

A population, a collection of interacting individuals of a single species, exhibits a change in allele frequency from one generation to the next due to five main processes.
These include natural selection, gene flow, genetic drift, and mutation.

Learn more about allele frequency

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The complete question is -

Identify the evolutionary forces that can cause allele frequencies to change from one generation to the next. Check all that apply

A. Inbreeding

B. Mutation,

C. random genetic drift

D. migration

E. extinction

F. natural selection

6 0

2 years ago

Group the terms according to the subatomic particle they describe.

LiRa [457]

Answer:

This question is incomplete

Explanation:

This question is incomplete but the completed question can be seen in the document attached.

There are three main subatomic particles namely electrons, protons and neutrons. However, the question only discusses two of them; electrons (negatively charged) and protons (positively charged).

A. Found in all matter

Answer: They are both found in all matter since all matter are made up of atoms and all atoms have both protons and electrons (and even neutrons).

B. Negative charge

Answer: The subatomic particle with negative charge (as discovered by R.A Millikan) is the electron

C. Exists in the nucleus

The subatomic particles found in the nucleus are the protons and neutrons.

D. Attract opposite charges

They both (protons and electrons) attract opposite charges because they are of opposite charges and generally unlike charges attract.

E. Moves at extreme speed

Of the two subatomic particles mentioned, electrons move faster than protons because of there lighter mass when compared to the protons. However, the fastest subatomic particle is the neutrino.

F. Bound by strong force

The protons are bound by strong nuclear force which binds them to the nucleus of the atom.

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3 0

2 years ago

Prokaryotic cell lacks membrane -enclosed structure is called?

yKpoI14uk [10]

The prokaryotic cell lacks a nucleus and membrane bound organelles.

4 0

3 years ago

Prolonged stress due to sustained child abuse is associated with reductions in the size of the:

spin [16.1K]