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andrey2020 [161]
3 years ago
5

1. Compare and contrast the reasons cell division is important for unicellular (single-celled) and multicellular organisms.

Biology
1 answer:
OLga [1]3 years ago
4 0

Answer:

See the answer below

Explanation:

<em>Cell division is the process by which cells give rise to themselves because new cells can only arise from preexisting cells according to the cell theory.</em>

For both unicellular and multicellular organisms, <u>cell division is important for reproduction</u>. Unicellular organisms can divide by mitosis to asexually reproduce new cells or by meiosis to sexually produce new cells. Mitotic and meiotic cell divisions can also help multicellular organisms to reproduce asexually and sexually respectively.

However, in addition to reproduction, mitotic cell division helps multicellular organisms to <u>grow as well as repair/replace damaged cells/tissues.</u> Through mitosis, more cells are produced leading to elongation, increase in height or weight as the case may be. Mitosis also ensures that damaged or dead cells are replaced by new ones.

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Joyce and Tim started piano lessons at the same time. They both practice about 30 minutes a day and enjoy playing
REY [17]

Answer:

O The ability to play the piano is influenced by genetics as well as the environment.

Explanation:

Since Joyce and Tim both started lessons at the same time, and practice the same amount these factors do not explain why Joyce is better than Tim. That means that C cannot be correct. Next D and A cannot be correct since they don't state anything that could explain why Joyce is better than Tim, they only say random facts about piano playing that could be true.

6 0
4 years ago
During replication, which sequence of nucleotides would pair with the DNA segment TTACGC? GGACTC AATGCG UUAGCG AACGTG
Lemur [1.5K]

Answer:

The Answer would be AATGCG.

Explanation: The reason is because A pairs with T and C pairs with G.

5 0
3 years ago
Read 2 more answers
The DNA is tightly wrapped around histone proteins in a chromosome why is this packaging necessary?
Luba_88 [7]

Answer:

3.) because the long dna will not fit inside the cell.

Explanation:

This question is oddly written. At first glance, I can tell it's not 1 or 2 because DNA doesn't "dissolve" in cell "water", nor will it "down" (I'm assuming this means "drown"?).

The main reasons for DNA packaging are so that the DNA can fit into the cell, and so it's protected from damage. The DNA is vital to the cell, so it protects it by coiling it up. Coiling and packaging are also important when it comes to gene expression.

8 0
3 years ago
2. A certain recessive, lethal gene is carried on the X chromosome. (Lethal genes are those that result in death.) A man marries
shtirl [24]

Answer:

The correct answer is : male : female = 1:2

Male percent = 33.33%

female percent = 66.66%

Explanation:

In this question, it is given that a lethal gene is carried by X chromosome which is recessive which means will cause death if both copies are recessive for this gene.

The cross between normal man and hybrid or heterozygous women

The gametes: XH and Y from man and XH and Xh from women where Xh is recessive letheal allele.

The cross:

         XH                          Y

XH     XHXH                  XHY

        normal female    Normal male

Xh    XHXh                     XhY

      Carrier female       dead male

This explains that out of three offspring two will be females and one male. Thus the percentage will be:

Male : 1*100/3  = 33.33%

Female : 2*100/3 = 66.66%

3 0
3 years ago
Part A: Design a food chain with four trophic levels, and identify the organism in each level. What happens to energy as it trav
Brums [2.3K]

Answer:

Part A

Part B =

Explanation:

A)

B) Many humans are omnivores. They consume both plant and animal material. Thus, they may be on the third or even fourth trophic level. (For example, if you consume beef (cows are herbivores), you are a part of the third trophic level)

7 0
3 years ago
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