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Ymorist [56]
3 years ago
14

The andromeda galaxy is located approximately 2.5 million light- years from earth. Why is the light that reaches earth 2.5 milli

on years old?
Biology
1 answer:
Ivan3 years ago
5 0
So, the Sun's light takes about 8.3 minutes to reach us. This means that we always see the Sun as it was about 8.3 minutes ago. ... The nearest large galaxy to us, Andromeda, is 2.5 million light-years away. So, we see Andromeda as it was 2.5 million years in the past.
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Which of the following is true of cells in batch culture? Cells never reach exponential growth rates. Metabolic wastes do not ac
Nataly [62]

Answer:

Option (3).

Explanation:

Batch culture may be defined as a type of culture which are refereed as stack and operated as influx of the reactant up to the maximum level. This technique is generally used to grow the micro organisms.

The cell mass do not decrease or increases as the cell divides in the batch culture. The new batch are added during the culturing process. The cell mass remains constant in batch culture.

Thus, the correct answer is option (3).

7 0
3 years ago
Muscular system -
hjlf

Answer:

Muscular system--helps the body move.

Skeletal system-- provides structur to the body.

circulatory system-- circulates oxygenated blood through the body.

respiratory system-- exchanges gases in the body.

integumentary system-- helps receive signals from the outside world.

7 0
3 years ago
Describe why translation of an mrna can start before transcription of the mrna is complete in prokaryotes but not in eukaryotes.
Lera25 [3.4K]

Answer:

<h2>In prokaryotes both transcription and translation occurs in cytoplasm (they lack true nucleus) while in eukaryotes, transcription occurs in nucleus while translation occurs in cytoplasm.</h2>

Explanation:

1. Prokaryotes do not have nucleus, so both transcription and translation occurs in the cytoplasm, therefor translation start before the completion of transcription.

2. While in eukaryotes, they have true nucleus, and there protein synthesis machinery (ribosomes) and  is situated in the cytoplasm.

So in eukaryotes transcription occurs in the nucleus, and after the completion of transcription, mRNA is processed and finally export into cytoplasm for translation.

3 0
4 years ago
What are the roles of the brain and spinal cord in the central nervous<br> system?
mrs_skeptik [129]

Answer:

together, the brain and spinal cord form the central nervous system. This complex system is part of everything we do. It controls the things we choose to do—like walk and talk—and the things our body does automatically—like breathe and digest food

hope that helps

4 0
3 years ago
Read 2 more answers
________ is found only in plants. a. Glycogen b. Lactose c. Cellulose d. Glucose e. Fructose
bearhunter [10]

Answer:

c.cellulose

Explanation:

it makes the cell walls of the plant cells whuch is abscent in animal cell.

4 0
3 years ago
Read 2 more answers
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