Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.
Answer:
25% of the offspring will have red skin
Explanation:
B b
B BB Bb
-----------|-----------
b Bb bb
So basically, if only 1 out of 4 of the punnet squares has both recessive alleles for red skin, then that makes it being 25% of offspring would have red skin.
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It represents the history of time which ends up being divided on the basis of the earth's biotic composition
Answer:
Summer
Explanation:
The Northern hemisphere is facing the sun completely, so summer is right.
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An ovary is the reproductive part of the uterus that produces the egg (ovum) to be fertilized by the sperm
