Biology Question (s)

Question 1: Which of the following is the result of gastrulation?
A) A hollow ball of cells
B) A zygote
C) The formation of organs
D) A three-layered embryo
E) A blastula

Question 2: Where are apical meristems located?
A) Scattered throughout the plant
B) In cylinders along the side of the root
C) Between the xylem and the phloem
D) In clusters in the parenchyma
E) At the tips of roots, shoots, and branches

Question 4: The umbilical cord of a mammal connects the
A) fetus and the placenta.
B) amnion and the chorion.
C) yolk sac and the allantois.
D) embryo and the amnion.

Question 5: In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the eggs by
A) wind pollination.
B) a pollen tube.
C) burrowing through the embryo sac wall.
D) cell division within the spore case.
E) digestion of the seed coat.

Question 6: A plant, such as an iris, that reproduces asexually most of the time probably
A) is found in a changing environment.
B) produces offspring that move into new environments.
C) lacks the ability to make flowers.
D) forms spores.
E) has offspring that live in the same environment as the parents.

Question 7: Conifers do not have flowers to attract pollinators. Instead, fertilization occurs
A) via wind pollination.
B) as the sperm and egg unite inside the woody cone.
C) when the endosperm takes the place of the male gametes.
D) when insects coated with pollen are trapped in the sticky resin.
E) when birds transfer pollen in their droppings after eating the pine seeds.

Question 8: In humans, implantation in the uterus occurs at which stage of embryonic development?
A) Blastocysts

B) Blastomeres

C) Trophoblasts

D) Dermal

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