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stich3 [128]
3 years ago
8

When did the first life appear?(how many years ago?)​

Biology
2 answers:
Veronika [31]3 years ago
8 0
Alc alc no se pero bendición carnal
Airida [17]3 years ago
4 0
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
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Suppose a female began menstruating at age 12 and stopped menstruating at age 55. if she never became pregnant and her menstrual
Arte-miy333 [17]

Answer:

561

Explanation:

This is math so I got you.

This is just going to subtract 12 from 55 since we don't now when during her 12th year of age she started or when during her 55th year f age she ended.

55 - 12 = 43, so about 43 years.  Also not going to account for leap years.  So we are just going to say each year had 365 days.  so 43 years and 365 days per year = 15695 days.

If her cycles were each about 28 days we divide the total number of days by 28 and that tells us about how many cycles there were.

15,695 / 28 = 560.5 which I will round to 561

561 cycles means 561 eggs if my biology knowledge is as accurate as I think it is.  

7 0
3 years ago
Read 2 more answers
Why does DNA need to be copied into mRNA?
larisa86 [58]

mRNA will serve as reference book that contains information as the DNA and its sequence is complementary to the DNA template.

The transfer of information in a DNA strand to a new molecule of messenger RNA is known as transcription. Thus, the process of transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors. However, DNA is copied into mRNA because mRNA will serve as reference book that contains information as the DNA and its sequence is complementary to the DNA template.

3 0
3 years ago
Creates unique set of DNA.<br> Does Mitosis or meiosis? Or both
Rainbow [258]

Answer:

Meiosis

Explanation:

Mitosis creates an identical set of daughter cells to the parent cells through asexual reproduction but meiosis creates a set of sex cells that are identical to each other but not to the parent cell and this is through sexual reproduction.

4 0
3 years ago
Please choose the answer that best describes a scientific location for 3,134,000,000
allsm [11]
3.13 x 10 ^9
This is because only 1 number is front of the decimal and 2 numbers should be after
7 0
3 years ago
A mRNA codon is AGC. The tRNA anticodon will be
Snowcat [4.5K]
YES YES YES YES YES YES YES YES I don’t get what u are saying but points for me!
3 0
2 years ago
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