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Andreyy89
2 years ago
6

Describe natural selection

Biology
2 answers:
Rina8888 [55]2 years ago
8 0

Answer:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

Explanation:

vovangra [49]2 years ago
3 0
Best suited to the situation survive, and the ones that aren’t die
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PROJECT: HOMEOSTASIS
Semenov [28]
Maintaining Homeostasis. The process in which organ systems work to maintain a stable internal environment is called homeostasis. ... Endocrine system: A high concentration of sugar in the blood triggers secretion of insulin by an endocrine gland called the pancreas.
The normal blood glucose level (tested while fasting) for non-diabetics, should be between 3.9 and 5.5 mmol/L (70 to 100 mg/dL). ...
 Blood sugar levels for those without diabetes and who are not fasting should be below 6.9 mmol/L (125 mg/dL).
There are lots of different hormones in the human body that serve lots of different functions, but some are used to maintain homeostasis of various physiological parameters, like blood glucose levels. Blood glucose levels are regulated by two opposing hormones: insulin and glucagon.
3 0
3 years ago
Fossils of ancient polar plants are currently found near the equator because the ________. A. entire earth had polar conditions
professor190 [17]
<h2>Answer is option "B"</h2>

Explanation:

  • Fossils are formed by unusal ways of minerals,energy and other substances. the sap solidifies and frames the semiprecious material called golden. In certain bits of golden the buried survives from living beings can be found. Volcanic ejections can shape fossils when creatures get caught in the hot debris streams. Right now, the fossil is a hole looking like an animal.
  • Truth be told coal is the fossil record of entire timberlands; in any case, singular plant structures normally don't make due as the plant materials are compacted to short of what one-hundredth of their unique size. the hard part of plants are remain the fossil.
  • So as to get fossilized, creatures must kick the bucket in a watery situation and become covered in the mud and residue.
  • hence, the right answer is option B "Plant lived near the poles,but landmasses have drifted to current locations".

6 0
3 years ago
An organism obtains food ,shelter, and other resources from its
Sliva [168]

Answer:

An organism obtains food and resources from its habitat.

Explanation:

:)

4 0
3 years ago
Two students are working together to Gram stain a mix of Gram positive and Gram negative cells. One of the students accidentally
Rasek [7]

Answer:

C.Both Gram positive and Gram negative cells would appear purple.

Explanation:

Gram staining is a technique used to differentiate bacteria to two main groups based on their difference in cell wall components.

Crystal violet, decolorizer(ethanol) and a counter stain are used.

Gram positive bacteria have a thicker peptidoglycan layer hence they will retain the crystal Violet stain even after decolorization. They will stain purple

Gram negative will stain pink due to losing the initial stain and taking up the counter stain after decolorization.

Therefore, if water is used instead of ethanol. Both bacteria will retain crystal violet stain in their cell wall.

6 0
3 years ago
WILL BE MARKED AS BRAINLIEST!!!!
Free_Kalibri [48]
The answer is cow pox
3 0
3 years ago
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