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Alisiya [41]
4 years ago
6

Galaxies are groups or systems of:

Biology
2 answers:
Dmitry [639]4 years ago
3 0
Heyy,

I think the answer is A planets

Hope this helps

~Girlygir101~
AlekseyPX4 years ago
3 0

Answer:the answer is c stars

Explanation:

a galaxy is made up of stars, one example is the milky way

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The principal enzyme involved in dna replication is called.
Arisa [49]

Answer:

Polymerase

Explanation:

The enzyme joins nucleotides to synthesize a new two strand of Dna

8 0
2 years ago
Dimples (D) and brown hair (A) are dominant traits. Answer the following questions based on the dihybrid cross shown:
ira [324]
1. DDAA, DdAa
2. DDaa, Dada
3. ddAA, ddAa
4. ddaa
5. The phenotypic ratio is 9:3:3:1 where 9 combinations will produce offspring with both dominant phenotypes (dimples and brown hair), 3 will produce offspring with one dominant phenotype and one receive phenotype (dimples, blonde hair), 3 will produce offspring with one receive phenotype and one dominant phenotype (no dimples, brown hair), and one will produce offspring with both recessive phenotypes (no dimples, blonde hair)
5 0
4 years ago
After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Sci
zhannawk [14.2K]

Answer: Directional selection

Explanation:

In the population genetics, directional selection is the mode of selection during which the extreme phenotype are favored more than the other phenotype.

This causes the allele frequency to shift towards the time in the direction of that particular phenotype.

Here, in the question the acid tolerant plant species is favored over the other phenotype.

Hence, the correct answer is option D

3 0
3 years ago
From what structure does a pollen grain devel
mote1985 [20]

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Explanation:

pollen is the plant equivalent of sperm in animals. Pollen fertilises the egg to form an embryo. Endosperm is the seed food supply.

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State what scientists might do to successfully combat bacteria that are resistant to vancomycin​
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Probably make a new medicine.

7 0
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Read 2 more answers
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