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velikii [3]
3 years ago
14

thrombocytes are cells which: a) carry oxygen. b) form antibodies. c)fight bacteria. d)form a blood clot

Biology
1 answer:
Ludmilka [50]3 years ago
7 0
D. Form a blood clot
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Based on your observations, which way does earth rotate—from east to west, or west to east? Explain your answer.
JulijaS [17]

Based on my observations, the earth rotates from west to east about the axis of rotation. The counter-clockwise rotation of the earth is as viewed from the North Pole star Polaris.

My observations supporting the counter-clockwise rotation of the earth are:

  • The Sun rises in the east and sets in the west.
  • All celestial objects including the stars and the moon rise in the east and set in the west.

The rotation is the result of the strong geomagnetic field of the earth. It is also responsible for the formation of day and night on the planet.

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6 0
11 months ago
Two butterflies mate and a genetic mutation causes the offspring to be a different color. Is this an example of biological evolu
brilliants [131]

A genetic mutation results in the offspring of two butterflies being a different color. There is no evidence of biological evolution in this.

In populations of organisms, biological evolution is the change in hereditary features through successive generations. When diversity is added to a population through gene mutation or genetic recombination or removed by natural selection or genetic drift, features undergo evolutionary alteration. the gradual genetic change within a population. What is the most likely outcome if two species rejoin after many generations if allopatric speciation has place after a population split into two different populations?

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3 0
2 years ago
Humans evolved ______billion years after the earth was formed
Novosadov [1.4K]
Humans evolved 3 billion years ago after the earth was formed.<span />
4 0
2 years ago
"One of the two major systems that are affected by the stress response is the ____________, which results in increased productio
MAXImum [283]

Answer:

The correct answer is the endocrine system.

Explanation:

The sympathetic division of the autonomic nervous system and the endocrine system are the two prime systems that take part in the stress response.  

At the time of acute or chronic stress, the endocrine system first makes the hypothalamus to discharge CRH or corticotropin-releasing hormone into the bloodstream. The release of CRH further makes the anterior pituitary to discharge ACTH or adrenocorticotropic hormone into the blood. This further stimulates the adrenal cortex to discharge cortisol, that is, one of the glucocorticoid hormone into the bloodstream.  

The cortisol finally makes the organs and tissues present within the body to effectively cope up with the initial stress stimulus.  

6 0
3 years ago
In a DNA sample, 15% of the bases are thymine (T). What percentage of the bases in this sample are adenine (A)
Marizza181 [45]
In DNA, thymine binds to adenine, and cytosine binds to guanine. This means that there is an equal amount of thymine and adenine, and there is an equal amount of cytosine and guanine. 

If there is 15% thymine, there should be 15% adenine.

Note that in real life, the percentage of bases won't be 100% equal. 
3 0
3 years ago
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