The point of fertilization occurs when
A) sperm are deposited in the vagina.
B) sperm reach the outer jelly coating of the egg.
C) sperm tails are shed.
D) the sperm nucleus and egg nucleus unite to form a zygote.
Correct Answer:
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Q3: Rotational cleavage is unique to
A)amphibians.
B)mammals.
C)sea stars.
D)lophotrochozoa.
Q4: After the fusion of sperm and egg
Q5: Entrance of more than one sperm
A)is called
Q6: A characteristic of development of Deuterostomia is
A)spiral
Q7: Radial cleavage is found in
A)birds.
B)mammals.
C)most protostomes.
D)sea stars.
Q9: Eggs with abundant yolk that is concentrated
Q10: Cleavage in mammals
A)is faster than most other
Q11: The concept that an egg contains the
Q12: Eggs with very little yolk that is
Q13: Cleavage on the surface of the yolk
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