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Aloiza [94]
3 years ago
14

Why must DNA replication have to occur before a cell can divide by mitosis?

Biology
1 answer:
otez555 [7]3 years ago
8 0
DNA replication needs to occur because existing cells divide to produce new cells. the DNA needs to be copied before cell division so that each new cell receives a full set of instructions
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Any easy way to remember about different tissues?? ...?
sesenic [268]
<span>Yea as letsreinventlove said, what tissues and how much detail, each of the ones mentioned each has its own sub-categories like loose or dense connective tissue etc. Put down a list of what ya want to know, eg Type; Function; where its found etc and ill happily answer it. Iyts quite a large area</span>
7 0
3 years ago
During photosynthesis, cells capture the energy of sunlight using (thylakoid / stroma / NADPH / chlorophyll), which is a type of
Alla [95]

Answer:

Chlorophyll

Pigment

NADP+

Carrier

Explanation:

Photosynthesis is the process where green plants synthesize their food in form of sugars using sunlight energy. Photosynthetic process occurs in two stages namely: Light dependent stage and Light independent stage.

In the light dependent stage, which occurs in the thylakoid lumen, cells capture the energy of sunlight using CHLOROPHYLL, a type of PIGMENT found in the chloroplast. However, photosynthesis also relies on a compound called NADP+, which serves as an ELECTRON CARRIER that accepts electrons to become NADPH and transfers its stored high-energy electrons.

5 0
3 years ago
Help please match the answer with number 5 and can u help with number 6 thank you!!
bearhunter [10]

Temperature-Thermometer

Mass-Balance

Length-Meter stick

Volume-Cylinder

Scientist can test this question

7 0
1 year ago
Imagine a genomic researcher who is analyzing the genome of different types of cats. She finds that a particular sequence in the
egoroff_w [7]

Answers:

  1. The sequence encodes a gene that is critical for life and cannot be easily mutated while retaining function.
  2. The sequence is contained in a retrovirus that has infected both species.

1- Explanation:

6.8 million years is a considerable period of time and if the cats were evolved in two different specie then technically they should have substantially different sequences of gene. However, there are some genes that are critical for the survival of the organisms because they encode a function which is equally important for the organisms of a certain category, even if they are different specie.

For example, the essential genes that are involved in maintenance of metabolism, initiation of replication or translation of genes. Therefore, with the period of time, the mutation of even a single nucleotide can be lethal for these genes, and if it happens organism will simply die. So, if one organisms is died that cannot take part in the process of evolution and would clearly be cut off from the process, However, those who survive can undergo some other mutations and become separate specie.

2- Explanation:

A retro virus inserts itself in to the genome of host organisms and become a part of them. It is very difficult to detect the presence of the retro virus until the organism undergoes infection due to its attack. Cats are a favorable host for retroviruses - called lentiviruses which attack the cats to cause a critical syndrome Feline Immunodeficiency Virus or FIV. Therefore, it is possible that same retrovirus having a particular sequence has attacked both cats and the sequences were taken from those cats.

Hope it help!

8 0
3 years ago
What is the meaning of c19
Licemer1 [7]

Answer: The nineteenth century the 1800s.

Explanation:

7 0
3 years ago
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