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Daniel [21]
3 years ago
5

(GIVING BRAINLIEST!!)

Biology
1 answer:
REY [17]3 years ago
6 0

Answer:

b

Explanation:

hope this helps if im right pls give brainliest

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Use this portion of a dichotomous key for tree identification to answer the question. 1a. Needlelike leaf ® Step 10 1b. Broad le
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Answer:

(if these are your choices)

A. They are lobed, simple leaves and are attached staggered on the branch.

B. They are not heart shaped and are attached staggered on the branch.

C. They are compound, broad leaves and are attached oppositely on the branch.

D. They are nonlobed, simple leaves and are attached oppositely on the branch.

the correct answer is D.

Explanation:

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Cycadophyta seeds are protected by __________________ .
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Pods hope this helps.
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Determine whether each statement describes mitosis, melosis, or both mitosis and melosis.
Kruka [31]

Answer:

This question is incomplete as it lacks statements, the statements and the answers are as follows:

occurs in organisms that sexually reproduce - MEIOSIS

occurs during growth and development - MITOSIS

the DNA is replicated - MITOSIS AND MEIOSIS

occurs in all organisms - MITOSIS

the number of chromosomes remains the same - MITOSIS

the number of chromosomes reduces by half - MEIOSIS

Explanation:

Meiosis and mitosis are both types of cellular divisions that occur in living cells. Mitosis involves the formation of two (2) daughter cells that are genetically identical to the parent cell while meiosis involves the formation of four (4) daughter cells that are genetically different from the parent cell.

The following are characteristics of the two division processes based on this question:

MITOSIS:

- It occurs during growth and development of an organism.

- it involves DNA replication

- it occurs in all organisms since every living organism undergoes growth and development.

- the number of chromosomes after mitosis remains the same in the daughter cell i.e. 2n remains 2n

MEIOSIS:

- It occurs only in organisms that sexually reproduce.

- it also involves the replication of DNA

- The number of chromosomes in the daughter cells is reduced by half i.e. 2n to n.

8 0
3 years ago
what is a type of asexual reproduction in which a nucleus undergoes cell division and two daughters cells are formed, each conta
kogti [31]

binary fission?

In binary fission, the parent is split into two daughter cells, each genetically identical while receiving a copy of DNA

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3 years ago
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

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