If gastrulation was blocked by an environmental toxin, then _____
A) cleavage would not occur in the zygote
B) embryonic germ layers would not form
C) the blastula would not be formed
D) the blastopore would form above the gray crescent in the animal pole
B
You might also like to view...
The ___ Echinoderm lineage is composed of sea stars, each with a central disk surrounded by 5 to 20 "arms."
a. Echinoidea b. Ophiuroidea c. Crinoidea d. Holothuroidea e. Asteroidea
Monoclonal antibodies are produced by fusing a
A) B cell and a cancer cell. B) B cell and a T cell. C) mast cell and a macrophage. D) T cell and a plasma cell.
What best describes the location where sexual spores form in club fungi?
a. in gills of the mushroom b. in club-shaped cells at the gill margin c. in fruiting bodies d. in club-shaped cells of mycelium e. in hyphae of an embryonic mushroom
Which of the following types of processing does eukaryotic mRNA NOT undergo before it becomes
functional? a. splicing b. capping c. polyadenylation d. removal of introns e. protein proteolysis