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sineoko [7]
3 years ago
7

Which event takes place first in the stages before the birth of a star?

Biology
1 answer:
RUDIKE [14]3 years ago
3 0

Answer:Nuclear fusion

Explanation:

Which event takes place first in the stages before the birth of a star? Gravity pulls gas and dust together. A protostar forms as mass increases. Nuclear fusion begins under high pressure.

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A farmer is experimenting with pea plants. If the farmer crosses two pea plants with round and yellow peas (genotype RrYy) how m
seropon [69]

Answer:

The genotype of both parents is RrYy.

The possible types of gametes would be RY, Ry, rY, and ry.

The cross would produce offspring that can have one out of four types of phenotypes:

  • Round and yellow seeds (1 RRYY+ 2 RrYY +2 RRYy + 4 RrYy) = 9/16
  • Wrinkled and yellow seeds (3 rrYy) = 3/16
  • Round and green seeds (1 RRyy + 2 Rryy) = 3/16
  • Wrinkled and green seeds (rryy) = 1/16

Thus, one out of 16 offspring would have wrinkled and green seeds.

4 0
3 years ago
Read 2 more answers
1.
makvit [3.9K]

Answer:

1.2The main processes involved in the movement of water between the different reservoirs are evaporation, condensation, transport, precipitation, runoff (water runoff from the ground surface), infiltration and transpiration

3.The large surface of the oceans (about 70 percent of the earth's surface is covered by oceans) favors the occurrence of large-scale evaporation. On a global scale, the same amount of water that is evaporated returns to Earth as precipitation. This however varies geographically

4.Earth from Space Although the engine of the cycle is the solar energy that originates the evaporation of liquid water, and therefore its passage into the atmosphere, the role of gravity is also fundamental, thanks to which precipitation falls and continental waters return to the oceans

5.The water cycle is powered by solar energy. The sun heats the surface of the ocean and other surface waters, which evaporates liquid water and sublimates ice, converting it directly from a solid to a gas. These sun-driven processes move water into the atmosphere in the form of water vapor

Explanation:

read

6 0
3 years ago
The coral reef ecosystem is full of interactions among organisma. Large fish called barracuda feed on smaller fish called parrot
sashaice [31]

the answer is algae because algae is an aquatic plant

7 0
3 years ago
Sea stars (starfish) can reproduce asexually by fragmentation if their arms are cut off, or sexually by releasing sperm and eggs
coldgirl [10]
I believe it's sexual reproduction in sea stars if that's the question. 
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3 0
3 years ago
Read 2 more answers
The picture shows the dihybrid cross of 2 guinea pigs.
Pepsi [2]

Corrected Question:

The picture shows the dihybrid cross of 2 guinea pigs.

1. What is the genotype of the parents?

2. What is the phenotype of the parents?

3. What is the genotype of their baby guinea pig (in the empty box)?

a. BbRr - black rough fur

b. Bbrr - black smooth fur

c. bbRr- white rough fur

d. bbrr - white smooth fur

Answer:

Genotype of parents is BbRr as seen in the cross.

Phenotype of the parents is black rough furred.

The genotype of the baby in the empty box is bbRR.

Option D

<h3><u>Explanation:</u></h3>

This representation of the genetic crossing is called as Punnet square, after the name of the scientist who discovered this process to denote the probability of finding the required genotype in a statistical way.

Here both the parents are heterozygous black and rough furred, with the genotype of BbRr.

So the gametes from the parents are = BR, Br, bR, and br from both the parents which are represented in the Punnet square.

Thus we can get 16 types of genetic combinations among the offsprings.

4 0
3 years ago
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