The fetal period is characterized by ________
A) the formation of organ systems
B) neurulation
C) germ layer formation
D) growth and preparation of fetal organ systems for their eventual functions
D
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Which of the following is the correct genus and species name of the common dolphin, a marine mammal?
What will be an ideal response?
A researcher has hypothesized that the chemical tributyltin (an additive in boat paint) seeps into the water causing reproductive defects in developing marine snails
In an experiment testing the effects of tributyltin on developing snails, which condition should be used as a control? A) Developing snails are kept in a tank of water and exposed to below-expected levels of tributyltin. B) Developing snails are kept in a tank of water and exposed to boat paint without tributyltin. C) Developing snails are kept in a dry tank to avoid exposure to contaminated water. D) Developing snails are kept in a tank of water that has been cleaned with chlorine bleach.
There is a fear that preconception genetic testing may lead to "designer babies." What historical practice comes to mind regarding the production of such babies?
A) gene driving B) gene editing C) inbreeding D) eugenics
A diploid organism that is heterozygous for a given gene has the same number of alleles (not type of alleles) as does an organism that is homozygous for that gene.
a. true b. false