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pishuonlain [190]
3 years ago
11

What can affect the rate of a chemical change?

Biology
1 answer:
Blababa [14]3 years ago
4 0
The answer should be, C.Temperature
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How are stars classified?
RUDIKE [14]

Answer:

Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.

Explanation:

O and B stars are uncommon but very bright. M stars are more common but dim.

3 0
3 years ago
Read 2 more answers
Suppose the human trait for hair type is controlled by a simple dominant and recessive relationship at one locus. Curly hair, C,
myrzilka [38]

Answer:

A) The frequency of the dominant allele, C = 0.4376

B) frequency of the heterozygous genotype, Cc = 0.2461

Explanation:

Given -

Curly hair, C, is the dominant allele, and straight hair, c, is the recessive allele

Number of students with curly hair is 37

Thus frequency of genotype "CC"

= q^{2} = \frac{37}{117} \\= 0.3162

Thus, frequency of allele "q"

= \sqrt{0.3162} \\= 0.5623

As per Hardy Weinberg's first  equation-

p+q=1

Substituting the value of q, we get -

p+0.5623=1\\p= 0.4376

As per Hardy Weinberg's second equation -

p^2+q^2+2pq=1\\

Substituting the values of "p" and "q" we get -

0.4376^{2} + 0.3162+2pq = 1\\2pq = 0.2461\\

Hence,

A) The frequency of the dominant allele, C = 0.4376

B) frequency of the heterozygous genotype, Cc = 0.2461

8 0
3 years ago
Read 2 more answers
Similarities between dna and rna
bonufazy [111]
Both have phosphate-pentose back bone, as well as both have adenine, cytosine and guanine bases. 
5 0
3 years ago
Antidepressant medication tends to increase the concentration of "_____" in the brain.
lbvjy [14]

Antidepressant medication tends to increase the concentration of central serotonin in the brain.

Antidepressants medications are drugs that are used to relieve symptoms of depression, anxiety disorders and other conditions. The concentration of central serotonin (a neurochemical) in the brain is increased to a dangerous level when antidepressant medications such as serotonin and norepinephrine reuptake inhibitors (SNRIs) or selective serotonin reuptake inhibitors (SSRIs) is used together with another antidepressant that also influences serotonin levels in the brain.  


8 0
3 years ago
Shortly after the zygote is formed, it begins the processes of duplication and division. Each resulting new cell has:
seropon [69]

Answer:A. the same number of chromosomes as was contained in the zygote.

Explanation:a zygote is formed when the sperm fertilize the egg .

After fertilization,the zygote undergoes cleavage.cleavage is the mitotic Division of the cells of a zygote to produce daughter cells.

These daughter cells are called blastomere,which contains the same number of chromosomes as the parent cells.the cells formed do not grow in size but continues to divide, forming a mass of cells.

This mass may be solid at first but as cleavage continues,the cells move away from the center,leaving a fluid filled cavity in the middle (blastocoel).

The mass of cells are called blastula.

5 0
3 years ago
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