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Schach [20]
3 years ago
5

What is the major source of energy for food chains? A.Water B.Air C.Sunlight D.Grass ​

Biology
1 answer:
Marina CMI [18]3 years ago
4 0
Sunlight is the main energy source
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Red blood cells usually live for about 120 days before they die and need to be replaced. Sickle cells are fragile — their membra
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When people have anemia, their body doesn't produce enough red blood cells. They don't get enough oxygen, which makes them feel fatigued and can also cause serious health complications.

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2 years ago
A cell in the testes of a male bald eagle is getting ready to begin meiosis. The diploid number for this bird species is 66. How
Ostrovityanka [42]

Answer:

Replicated chromosomes at metaphase I = 66

Sister chromatids at metaphase I = 66 x 2 = 132

Sister chromatids at prophase II = 66

Chromosomes in each sperm cells = 33

Explanation:

Metaphase I of meiosis I would have 66 replicated chromosomes in the testicular cells of the bird. Each of the replicated chromosomes would have two sister chromatids. So, a total of 66 replicated chromosomes would have 66 x 2 = 132 sister chromatids.  

Due to segregation of homologous chromosomes towards opposite poles in anaphase I, each daughter cell formed by the end of meiosis I would have 33 replicated chromosomes. So, each of the daughter cells would have a total 33 x 2 = 66 sister chromatids at prophase II.  

Since meiosis II maintains the chromosome number, each sperm cell formed by the end of meiosis II would have 33 chromosomes.  

8 0
3 years ago
Which of these is an advantage of using models to study tectonic plate movements?
wariber [46]

The correct answer is option Observations can be made from outside the "system".

The study of the plate tectonics allows the observation of the movement of the plate tectonics. These observation can be study to determine the pattern of the movement from outside the plate tectonics system and the event occurring due to plate tectonics can be predicted.

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The process of making rna from dna is called transcription and it occurs in the
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3 years ago
What is the difference between genus and species?
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3 years ago
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