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Korolek [52]
3 years ago
11

What is a prokaryote, and when did prokaryotes arise?

Biology
1 answer:
RideAnS [48]3 years ago
8 0
<span>A prokaryote is a unicellular organism that belongs to either the domain Bacteria or the domain Archaea. Therefore, unlike a eukaryote, the prokaryote lacks in a nucleus and other organelles. The first organisms that appeared about 3.5 billions years ago were prokaryotes. They developed primitive forms of photosynthesis without oxygen as a waste. The first photosynthesizing prokaryotes appeared about 2.7 billion years ago which led to the changes in Earth atmosphere and consequently organisms dependant on oxygen could arise.</span>
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IRISSAK [1]

Answer:

I'm sorry but what exactly is your question?

8 0
3 years ago
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In humans, what is the only homologous chromosome pair that isn't the same?
Katen [24]

Answer;

-23 in males

In humans, 23 in males is the only homologous chromosome pair that isn't the same.

Explanation;

-In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.

-Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome.

-The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes.

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3 years ago
Describe the effect of increasing phosphorus levels on producers.
lutik1710 [3]

Answer:

too much phosphorus can slow down the growth of a plant.

Explanation:

Excessive soil phosphorus reduces the plant’s ability to take up required micronutrients, particularly iron and zinc.

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irga5000 [103]
Dominant because dominant genotypes overcome recessive genotypes
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3 years ago
Please help me with these
olga_2 [115]

those are nucleotides

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