Each time a diatom reproduces sexually, the size of the daughter cells decreases until diatoms are about 30% of their original size. At this point, they begin to reproduce asexually.
Answer the following statement true (T) or false (F)
False
Each time a diatom reproduces asexually, the size of the daughter cells decreases until diatoms are about 30% of their original size. At this point, they begin to reproduce sexually.
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Which hormone acts on the Sertoli cells to help sperm mature?
a. testosterone b. FSH c. LH d. GnRH e. hCG
Cystic fibrosis and phenylketonuria are common autosomal dominant disorders.
Answer the following statement true (T) or false (F)
Which of the following statements correctly describes the behavior of a tetrad during anaphase I of meiosis?
A) It travels intact to one pole of the dividing cell. B) It splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell. C) It splits into two pairs of homologous, nonsister chromatids, and one pair goes to each pole of the dividing cell. D) It splits into four chromosomes, which distribute in random pairs to the two poles of the dividing cell.
During an action potential, repolarization occurs _____
when sodium diffuses into the cell when potassium diffuses out of the cell when calcium ions diffuse into the synaptic knob only where sodium-potassium pumps are absent