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e-lub [12.9K]
3 years ago
6

PLEASE HELP ME ITS DUE TODAY PLEASE YOU DONT HAVE TO AWNSER THEM ALL

Biology
1 answer:
dybincka [34]3 years ago
7 0

Answer:

1 = A

2 = B

3 =  B

Explanation:

1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.

2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.

3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.

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Consider the abbreviated model of meiosis and the four gametes produced at the completion of meiosis II. Imagine that these game
den301095 [7]

The right answer is A) Trisomy

Aberrant karyotypes containing an abnormal number of chromosomes are known in the human species. The best-known (and most common) chromosomal abnormality is trisomy 21, which is responsible for Down syndrome (mongolism). There are others such as Turner syndrome (woman with a single X chromosome) or Klinefelter syndrome (man XXY).


These abnormalities originate from the non-disjunction of the chromosomes of a pair of homologues during metaphase I of meiosis. At the end of division I, a daughter cell contains the two chromosomes of the pair considered and the other cell does not contain a chromosome of this pair. A similar result can be obtained during a bad distribution of chromatids during anaphase II.


After fertilization from a gamete of this type, a trisomy or a monosomy is obtained.

4 0
3 years ago
Read 2 more answers
Explain the processes that take place in the stroma including the reactants going in and the products produced from these proces
poizon [28]

Stroma, in a biological explanation, the fluid in between grana, where carbohydrate formation reactions occur in the chloroplast of plant cells photosynthesizing.

Explanation:

Part A

 In the bright daylight, the Calvin cycle happens indoors in the stroma. throughout the Calvin cycle, the results  ATP and NADPH are conventional convert molecules of carbonic acid gas into high-energy sugars.

Part B

In the darkness, the Calvin cycle conjointly occurs within the stroma. through the Calvin cycle, the products ATP and NADPH are used to change molecules of CO2 into high-energy sugars.

Part C

There will be a decrease in the products ATP and NADPH if the plants are unbroken within the dark for a protracted time and also the Calvin cycle can't be sustained.

8 0
3 years ago
Read 2 more answers
Inside which portion of a cell does translation take place?
VikaD [51]
Translation occurs in the nucleus to produce a pre-mRNA molecule.  The pre-mRNA is the processed into the mature mRNA which exists the nucleus and is translated into the cytoplasm.
So, the answer is B)  NUCLEUS
8 0
3 years ago
Where do the respiratory and circulatory systems meet?
zlopas [31]

Answer:

Option C. The lungs.

Explanation:

Alveolis are the air sacs in the lungs which main function is to get oxygen into your bloodstream and carbon dioxide leaves the blood.

The alveolis are located in the lungs, and it's where the respiratory and circulatory systems meet, for the reasons stated before.

Therefore, the correct option is Option C.

3 0
3 years ago
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What efforts are made to preserve the lion population?
Viefleur [7K]
Whildlife centers are made to preserve the lion population.
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