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agasfer [191]
3 years ago
6

What must be broken for a DNA strand to separate?

Biology
1 answer:
ipn [44]3 years ago
3 0
Hydrogen bonds connecting base pairs must be broken.
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Describe the function of each organelle.
Elis [28]

Answer:

Cytoplasm: Fluid between the cell membrane and the nucleus. helps protect organelles

Nucleus: A part of the cell containing hereditary information and is responsible for growth and reproduction; the "command center" of the cell.

Ribosome: A small particle in the cell that can make proteins.

Endoplasmic Reticulum: A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another.

Golgi Apparatus: A cell structure that helps make and package materials to be transported out of the cell or for storage inside the cell.

Lysosome: Cell organelle filled with enzymes needed to break down certain materials in the cell, such as large food particles or old parts of the cell. May be found only in animal cells.

Vacuole: Saclike storage structure in the cell. can store water, nutrients, and even toxic substances.

Mitochondrion: An organelle containing enzymes responsible for producing energy. (Metabolism/respiration)

Chloroplast: An organelle found in the cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy (photosynthesis).

Cell membrane: The thin, flexible barrier around a cell; controls what enters and leaves the cell.

Cell wall: The structure outside of the cell membrane that is used to provide support and protection. Present in plants, algae, fungi, and many prokaryotes.

8 0
3 years ago
At what level does gene variability quantify genetic variation?
sergejj [24]

Answer:

Answer is whole-gene or whole-genome.

Explanation:

Genetic variation explains that, no matter how related or identical some organisms might be, there is a or some characters that make them different from one another. These difference is referred to as variation.

Furthermore, whole-gene means the coding and non-coding regions of the DNA>

There are some activities or occurrences that cause genetic variation, these are gene flow, mutation and sexual reproduction.

Examples of genetic variation are color of the eyes, modification of leaf and blood type among others.

7 0
3 years ago
What is a zygote? help plz also heres a meme
weeeeeb [17]

its a diploid cell that comes from the fusion of two haploid gametes.

aka a fertilized ovum.

tyyy ima collect this meme

3 0
3 years ago
Read 2 more answers
What must happen to a chromosome before a cell starts mitosis?
slamgirl [31]
The chromosome must be duplicated before mitosis.

Mitosis is where a parent cell divides and produces 2 genetically indentical daughters cells. This process first requires the parent call to duplicate all of its genetic material. This ensures that the daughters cells are genetically identical to the parent cell and also the other daughter cell.

This is important because mitosis is used in many cases in living things such as growth, repair, and more. This ensures us for example not suddenly changed to another organism or another characteristic.
3 0
3 years ago
The secretions of the adrenal medulla act to supplement the effects of ________.
Nutka1998 [239]

Answer:

sympathetic stimulation

Explanation:

Under stress or emergency conditions, the preganglionic neurons of the sympathetic division release acetylcholine. Acetylcholine stimulates secretion and release of epinephrine and norepinephrine from the adrenal medulla. These hormones enhance the effects of the sympathetic division of the autonomic nervous system (ANS) during stress. Epinephrine and norepinephrine augment the fight-or-flight response as they increase the heart rate and force of contraction, the output of the heart, and blood pressure. They also increase blood supply to the heart, liver, and adipose tissue. The airways to lungs become dilated and there are increase blood levels of glucose and fatty acids.

7 0
3 years ago
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