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atroni [7]
3 years ago
9

Why was the evolution of cyanobacteria such a significant event in Earth's history

Biology
1 answer:
mestny [16]3 years ago
8 0

Explanation:

oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.

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A biochemist isolated and purified molecules needed for dna replication. Whne she added some dna, replictation occursd but the d
liberstina [14]

Answer:

She left Ligase enzyme out of the mixture.

Explanation:

DNA replication is the process of formation of new molecules of DNA from the existing one. This process occurs in semiconservative way i.e each new strand consist of one newly synthesised strand and one old parent strand that act as template for the formation of new strand. replication on one strand occurs continuously from 5 prime to 3 prime but on other strands it occurs discontinuously from 5 prime to 3 prime because DNA polymerase moves only in one direction from 5 prime to 3 prime. Hence in discontinuous strands gaps remained. These gaps are filled by Ligase enzyme.

Requirements for DNA replication:

DNA replications needs

Primers

DNA Polymerase enzyme

DNA helicase enzyme

Single nucleotide binding protein

dNTPs

and Ligase enzyme.

Correct choice:

She left Ligase enzyme out of the mixture.

3 0
3 years ago
Which system helps filter waste out of the body?
patriot [66]

Answer:

I think it is the excretory system

8 0
3 years ago
The portion of the membrane system in eukaryotic cells that is responsible for the making lipids and breaking down toxic substan
hichkok12 [17]
<span>The answer is smooth endoplasmatic reticulum. Smooth endoplasmic reticulum is involved in the production and metabolism of lipids and in the production of steroid hormones. Also, smooth endoplasmic reticulum converts organic chemicals to water-soluble products and that way detoxifies them.</span>
8 0
3 years ago
Read 2 more answers
Two short haired guinea pigs are mated several times. Out of 100
postnew [5]

Answer:

Both heterozygous, with the trait for short hair being dom over the long hair

Explanation:

25% would be homzygous dominant, 25% homzygous recessive and 50% heterozygous

i think this is wrong but i tried

6 0
3 years ago
Which best describes oogenesis and spermatogenesis?
pochemuha
The answer is <span>B. In both oogenesis and spermatogenesis, the cells become haploid after meiosis I.

Gametogenesis is a process in which gametes are produced. Oogenesis is a process in which egg cells are produced and spermatogenesis is a process in which sperm cells are produced. Both processes include meiosis.
Original diploid cell (primary oocyte or spermatogonium) has 46 chromosomes. After meiosis I, there are two haploid cells. After meiosis II, there are 4 haploid cells because meiosis II is similar to mitosis. The difference between spermatogenesis and oogenesis is that those 4 cells after meiosis II in spermatogenesis are all sperm cells, and in oogenesis only one of them is egg cell.</span>
5 0
3 years ago
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