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koban [17]
3 years ago
11

Which of these sentences describe sources and preservation of genetic variation? Select all that apply.

Biology
1 answer:
madam [21]3 years ago
4 0

The correct sentences are the following:

 A) Antibiotic resistance in bacterial populations is caused by natural selection of bacteria that inherit mutations that make them resistant to the antibiotics.

 C) Crossing-over causes a shuffling of allele combinations during meiosis as the alleles from each parent form new combinations on homologous chromosomes.

 E) When two bacteria are linked during conjugation, the donor cell passes DNA to the recipient cell which causes genetic recombination.

Explanation:

These three options are associated with the generation and preservation of genetic diversity

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After a short, high-level exposure to a toxicant, you immediately feel dizzy and nauseous. you are likely showing symptoms of:__
vekshin1

Blood pressure drops excessive they sit or stand up which condition called  or postural hypo-tension.Orthostatic hypotension which is also called postural hypotenmnsion.

Orthoostatic hypotension caan caused dizziness or lightheadedness hypotension which is a form of low blood pressure that can happens when standing after sitting or lying down.But in some cases people with high blood pressure may have a pounding feeling in their head or cheat a feeling of lightheartedness.

Dizziness and nausea people feeling lightheaded enough to faint or notice cold, clammy skin, blurry vision, or chest pain.Dizziness or light headedness when standing occurs in about 20% of old people.

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brainly.com/question/13014679

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5 0
2 years ago
If you submerge a mussel in an environment in which the ambient osmotic pressure progressively increases, the blood osmotic pres
bezimeni [28]

Answer:

The correct option is 'a'

If osmotic pressure increases when a mussel is submerged in the water,the blood osmotic  pressure also increases.

Explanation:

Mussels are bivalves that are found in fresh water as well as marine water.

They have bluish blood and small heart pumps the blood.Some mussels have red blood which contain hemoglobin that carry oxygen rather than hemocyanin.

The mussels show increase in blood chloride level and amino acid when the osmotic pressure of the water increases.

Submerging the mussel in the aquatic environment increases osmotic pressure of the mussel.

4 0
4 years ago
Why do we lose colour vision in low light?
Ray Of Light [21]
Because  in the dark  only the rods are the working part in your eyes and they only detect dark colors or purple to be specific 
4 0
4 years ago
The cell membrane controls the traffic of molecules into and out of the cell, prevents the entry of toxic material into the cell
elena55 [62]
"<span>Semi-permeable nature of the membrane" is the property of the membrane among the choices given in the question that this can be attributed to. The correct option among all the options that are given in the question is the fourth option or option "D". I hope that the answer has actually come to your help.</span>
7 0
3 years ago
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A red blood cell has been placed into three different solutions. One solution is isotonic to the cell, one solution is hypotonic
Dmitry [639]

The type of solution in each beaker based on cell's reaction are :

  • Isotonic solution : Normal reaction
  • Hypotonic solution : The cell becomes turgid
  • Hypertonic solution : The cell becomes deformed

<h3>Matching each solution to the cell reaction </h3>

When the red blood cell is placed in an isotonic solution the solvent flows in and out of the blood cell at the same rate, when the cell is placed in a hypotonic solution the solvent flows into the cell at a faster rate causing the cell to swell ( becomes turgid ) also when the cell is placed in a hypertonic reaction the cell becomes deformed becomes it loses more water than it absorbs.

Hence we can conclude that The type of solution in each beaker based on cell's reaction are : Isotonic solution : Normal reaction, Hypotonic solution : The cell becomes turgid, Hypertonic solution : The cell becomes deformed

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2 years ago
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