The morphological species concept would relate more to
a. prezygotic isolation.
b. postzygotic isolation.
c. both prezygotic and postzygotic isolation
d. neither prezygotic nor postzygotic isolation
e. it would depend on the species used for the study
B
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RNA and proteins combine in cells to form structures called ribosomes. Ribosomes contain the active site for peptide bond formation. Based on their chemical structures, do you think protein or RNA molecules actually form the active site within the ribosom
A) protein, because RNA cannot catalyze reactions B) RNA, because proteins cannot catalyze a reaction that involves another protein C) proteins, because only proteins can catalyze a reaction that involves another protein D) It could be either, because both molecules have catalytic properties.
This vitamin can prevent spina bifida. _____
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
A reflex ____
a. only involves the use of sensory neurons b. is an automatic response to a stimulus that requires considerable thought c. is an automatic response to a stimulus that doesn't require thought d. is an involuntary response that requires only one neuron e. does not require the brain
What is the main difference in the formation of coal vs. the formation of natural gas and oil?
A. Coal formed mainly from deposits of plants and animals living in oceans and natural gas and oil formed mainly from the remains of plants and animals in swampy anoxic environments. B. Coal takes several million years to form and natural gas and oil take much less time, roughly several thousand years. C. Natural gas and oil require intense heat and pressure to form and coal only requires an anoxic environment. D. Natural gas and oil formed mainly from deposits of plants and animals living in oceans and coal formed mainly from the remains of plants and animals in swampy anoxic environments.