On what basis was life divided into three domains?
A. cytochrome c sequence data
B. the presence or absence of a nucleus and organelles
C. presence or absence of mammary glands
D. rRNA sequence data
E. mitochondrial DNA sequence data
Answer: D
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Process during which a single sperm penetrates the secondary oocyte, which will eventually result in the fusion of the egg and sperm nuclei and the development of a zygote. _____
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
Gastrulation produces
a. hollow balls of cells. b. embryos with germ layers. c. solid balls of cells. d. maternal messages. e. yolk.
What are the predicted phenotypes of the male children from the union of a woman who is
heterozygous for hemophilia and a man who has normal blood clotting characteristics? (Use the Punnett square to verify your answer.) a. all normal b. 3 normal : 1 hemophilia c. 1 hemophilia : 1 normal d. 1 hemophilia : 3 normal e. all hemophiliacs
Scientists agree on the size of the carrying capacity of Earth for the human population
Indicate whether the statement is true or false