In a secondary oocyte, meiosis is halted in metaphase II until
A. ovulation.
B. FSH is present.
C. fertilization occurs.
D. LH is secreted by the anterior pituitary.
E. puberty.
C. fertilization occurs.
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Match the following names with the correct statements.
_______1. This German scientist proposed the theory of biogenesis—that life can arise only from preexisting life. _______2. This Dutchman built single lens microscopes as a hobby and is believed to be the first person to see live bacteria and protozoa. _______3. This German physician developed a step-by-step scientific method to prove that a particular microorganism causes a particular disease and contributed to what is known as “the germ theory of disease.” _______4. This French scientist discovered that microorganisms are responsible for fermentations, contributed to disproving abiogenesis, and contributed to what is known as “the germ theory of disease.” a. Robert Koch b. Louis Pasteur c. Rudolf Virchow d. Antony van Leeuwenhoek
The effect of red light on phytochrome is
indicated by a. A. b. B. c. C. d. D. e. none of these
Genetic maps show the relative location and arrangement of genes on chromosomes
Indicate whether the statement is true or false
The genetic code is expressed differently in bacterial and archaeal cells than in eukaryotic cells.
Answer the following statement true (T) or false (F)