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VladimirAG [237]
2 years ago
14

Describe the relationship and differences between chromatin, chromosomes, and sister chromatids

Biology
1 answer:
PtichkaEL [24]2 years ago
7 0
Chromatin is dna that makes a chromosome and chromosomes are different dna strands in a cell, sister chromatids are identical pieces of dna
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The national environmental policy act requires the federal government to
SVEN [57.7K]

Answer:

use all practicable means to create and maintain conditions under which man and nature can exist in productive harmony

Explanation:

4 0
3 years ago
In mitosis, when do the sister chromatids align with centrosomes in the cells?
USPshnik [31]

Answer:

The answer is probably B. Metaphase

Explanation:

In mitosis, the sister chromatids align in the "center" of the cell as the centrosomes are at the poles of the cell. They do this, moving on to the next phase Anaphase - where they will eventually split. Interphase isn't part of mitosis - it describes the period in which the cell is just growing and copying DNA.  If you textbook says it is, then thats ok, sometimes its included as part of it (even though technically its not).      

4 0
3 years ago
Read 2 more answers
Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat, end diastolic volume
Yakvenalex [24]

ANSWER: None of the above options are correct.

Cardiac Output(CO) = Stroke Volume(SV) × Heart Rate(HR)

Therefore where HR= 90bpm and SV= 110ml/min,

CO = 90 × 110 = 9900ml/min or 9.9L/min.

EXPLANATION:

CARDIAC OUTPUT is the volume of blood being pumped by the heart into the systemic circulation per minute.

Cardiac output is the product of two variables, stroke volume and heart rate.

STROKE VOLUME is the amount of blood pumped out by the left ventricle in each contraction.

HEART RATE is the count of the number of times the heart beats per minute.

6 0
3 years ago
How are changes in the gene pool significant in evolution?
pickupchik [31]
Changes in the gene pool are closely related to genetic mutations, which are a major part of evolution.
6 0
2 years ago
As a biologist working with a cell culture, you notice that the ends of the chromosomes are decreasing in size after each cell d
S_A_V [24]

Answer:

In the given case, it can be concluded that very less amount of telomerase is being produced.

Explanation:

Terminal transferase or telomerase refers to a ribonucleoprotein that supplements a telomere repeat sequence to the 3 prime terminals of telomeres. A telomere is present at each terminal of the chromosomes found in the majority of eukaryotes. It helps in safeguarding the terminals of the chromosomes from destruction or from getting combined with the adjacent chromosomes.  

Telomerase has its own RNA molecule and works as a reverse transcriptase enzyme. Generally, telomerase is found active in gametes, in stem cells, and in the majority of cancer cells, however, it is generally present in low concentration or is absent in the majority of somatic cells. Thus, the decrease in the ends of the chromosomes suggests that the production of telomerase is taking place at low levels.  

7 0
2 years ago
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