During cleavage, the stage at which the pre-embryo becomes a solid ball with more than 12 cells. _____
A) Human chorionic gonadotropin
B) Zygote
C) Chorion
D) Morula
E) Folic acid
F) Fertilization
G) Blastocyst
H) Parturition
I) Cleavage
J) Ovulation
K) Placenta
L) Implantation
Answer: D) Morula
You might also like to view...
In living seed plants, a megasporangium and its integument together form a(n) ____
a. seed b. pollen grain c. ovary d. mature ovule e. immature ovule
Which of the following statements is true of reptiles?
A. Eggs undergo external fertilization. B. Sperm are released in the vicinity of the female. C. Eggs have an amnion and a chorion. D. Larvae become adults by metamorphosis. E. Embryonic and fetal development in all species is only by oviparity.
In recombinant DNA technology, enzymes used to precisely cut DNA are called
a. DNA ligases. b. restriction enzymes. c. DNA polymerases. d. RNA polymerases. e. vectors.
You count 1000 F2 seeds from a monohybrid cross. How many do you expect to display the dominant phenotype?
A) 1000 B) 750 C) 500 D) 250 E) 0