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KonstantinChe [14]
3 years ago
14

Which of the following best describes a spiral galaxy?

Biology
2 answers:
Andru [333]3 years ago
8 0
A galaxy where mainly stars and planets form around one or more spiral arms. (usually more?)

Rus_ich [418]3 years ago
8 0
<span>Several billion stars arranged in arms spiraling outwards

because </span><span>Spiral galaxies have a central core from which curved arms spiral outward</span>
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If the cell could no longer produce atp, what would be the effect on the sarcoplasmic reticulum?
MAXImum [283]
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7 0
3 years ago
Which protein inhibits interaction between actin and myosin to prevent skeletal muscle contraction; and which ions remove the in
zloy xaker [14]

Answer:

Tropomysin, calcium

Explanation:

Tropomysin is a protein that prevents muscle contraction hence acts as a contraction inhibitor. It wraps around the actin blocking the binding sites for myosin on the actin.

Muscle will only contract when they get a rush of calcium ions.

The calcium ions binds to troponin, the troponin changes its shape. The change in shape will remove tropomyosin from the binding sites allowing myosin to bind on the actin leading to muscle contraction.

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2 years ago
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A, i think, hope this helps:)
4 0
3 years ago
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If the frequency of an allele is 0.75, how many copies of this allele should be in a population of 300 diploid individuals?
Ray Of Light [21]

I have provided the options below:

a. 150

b. 225

c. 300

d. 450

e. 75

Answer:

150

Explanation:

Hardy-Weinberg law states, the allelic frequencies of a gene that is, q and p follow the relationship p^2+q^2+2pq = 1, if the population is in equilibrium.

Therefore p^2+q^2+2pq = 1, can be used to calculate the percentage of the allelic frequencies i.e. p^2 and q^2

Allelic frequency = 0.75.

Therefore, the percentage of the allele in the population would be given by

0.75^2 = 0.5625 = 56%.

And the total number of individuals with this allele in the population:

number of individuals = 56×300÷100

= 168 or

150 nearest figure.

8 0
3 years ago
Which of the following is NOT a personal safety rule?
Maru [420]

Answer:run to the patient's room when code blue is called

Explanation:

5 0
3 years ago
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