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Elina [12.6K]
3 years ago
7

I have a brainliest! help!!!

Biology
2 answers:
Harrizon [31]3 years ago
5 0
<span>Genetic drift greatly affects small populations, but large populations can recover.


</span>
mel-nik [20]3 years ago
4 0

The correct answer is option B, that is, Genetic drift greatly affects small populations, but large populations can recover.  

Genetic drift in combination with mutation, natural selection, and migration is one of the most fundamental mechanisms of evolution. Genetic drift refers to a change in the relative frequency of distinct genotypes in a small populace, owing to the chance vanishing of specific genes as individuals do not reproduce or die.  


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In a chemical analysis of a sample of animal tissue, which element would most likely be found in the smallest quantity?
andreyandreev [35.5K]

Answer:

Iodine

Explanation:

Iodine is needed by animals because the body's metabolic rate is controlled by the action of an iodine hormone, called thyroxine, which is secreted by the thyroid gland in the neck.

If the animal fails to supply enough iodine through food to be able to make a normal amount of this compound, then the thyroid gland enlarges or expands trying to create enough, resulting in a common type of goiter.

8 0
3 years ago
This part is used to bring the specimen into sharp focus. This part causes a very small up and down motion when used.
Mekhanik [1.2K]

Answer:

Fine focus.

Explanation:

If you're referencing a microscope, then it would be fine focus. Coarse focus is a basic focus used to properly see a specimen, while fine focus enhance clarity and precision. To use both, you have to gently twist a knob until you can see the specimen at a desired clarity.

Here's a reference image if you need it, it's labeled all the parts of a microscope.

6 0
4 years ago
Plants adapted to the desiccating effects of the land environment and increased ultraviolet radiation with the evolution of ____
MrRissso [65]

Answer:

e. ​cutin

Explanation:

Plant exhibit many variations to withstand the temperature variations, desiccation and increased UV exposure which are some of the factors associated with land habitat. Cutin is a waxy substance that is found in the outer walls of the epidermal cells of plants. Cuticle in plants serves to make the outer most covering of aerial parts of the leaves and non-woody stem of herbaceous plants. The cuticle is made of cutin.

Cutin serves to protect the plant’s aerial surfaces from excess water loss. It also filters the excess UV light and thereby protects the underlying plant parts. The thickness of the cuticle varies in different plants depending upon the environmental conditions. The leaves of plants adapted to hot, dry climates have thick cuticles. The thickness of the cutin layer also varies in different parts of a plant. For example, the upper epidermis of leaf generally has a thicker cuticle than the shaded and relatively cooler lower epidermis.

3 0
3 years ago
What does human reproduction usually involves
qaws [65]
Sexual intercourse. The developing of the female egg cells and the production of sperm cells
3 0
3 years ago
Read 2 more answers
Which process is unlikely to be carried out by an animal cell?
Semenov [28]

Answer:

B

Explanation:

Animals derive energy by eating plants or animals and using cellular respiration to make ATP. Plants capture energy from the sun via photosynthesis and make sugar and oxygen. They can then use the sugar to perform cellular respiration to derive energy.

5 0
3 years ago
Read 2 more answers
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