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katovenus [111]
3 years ago
14

4. When was the first STS mission? O 1958 O 1969 0 1981

Biology
1 answer:
faust18 [17]3 years ago
4 0

Answer:

1981

Explanation:

<em>"A new era in space flight began on April 12, 1981, when Space Shuttle Columbia, or STS-1, soared into orbit from NASA's Kennedy Space Center in Florida."</em>

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Damage to the highlighted region of the spinal cord results in ________ of the skeletal muscles served by that particular region
skad [1K]

Answer:

Non-functioning

Explanation:

Non-functioning of skeletal muscles occurs when the spinal cord region is damaged because spinal cord is responsible for sending information in the form of signals. The spinal cord has a network of fiber started from the brain and distributed to all the body is known as neurons. These neurons are responsible for sending instructions to the muscles from brain. If they are damaged, the body parts unable to move and can't perform their particular function.

7 0
3 years ago
Natural selection Darwin hypothesized that there requisites for natural selection to occur and that there are definite steps to
lana66690 [7]

Answer:

A. sexual reproduction must occur.

Explanation:

i may be wrong because we cant see the models but biased on what i know A seems to be the correct one.

i'm sorry i couldn't be more help.

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7 0
3 years ago
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Amolecule of dna was found to contain 120 adenine and 120 guanine bases.how many nucleotides comprise this molecule of dna?
coldgirl [10]

Answer:

480 nucleotides comprise this molecule of dna

Explanation:

According to Chargaff rule,

  •        Adenine is paired with thymine
  •        Cytosine is paired with guanine

Given in the question

Adenine residue = 120

Cytosine residue = 120

So, [A] = [T]

i.e. [A =120] = [T=120]

again, [C] = [G]

i.e. [C=120] = [G=120]

hence, total number of nucleotides present

=> [A] + [T] + [C] + [G]

=> 120 + 120 +120 +120

=> 480.

3 0
3 years ago
Centrioles duplicate during the cell cycle. given your knowledge of the cell cycle, when would you guess that the duplication of
mamaluj [8]
The duplication of centrioles occurs at the same time as DNA duplication for the cell cycle; that is, in the S phase of interphase.
7 0
3 years ago
Identify 2 abiotic limiting factors. Select two that apply.
chubhunter [2.5K]
2 abiotic(non living) limiting factors are water(A) and food(B)
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