Which of the following developmental events occurs
last?
a. tissue specialization
b. gamete formation
c. gastrulation
d. cleavage
e. organ formation
Answer: a
You might also like to view...
The phylogenetic distribution of the enzyme rubisco is limited to _____
A) only C3 plants B) C3 and C4 plants C) photosynthetic eukaryotes D) bacterial and eukaryotic photoautotrophs E) all living cells
When a few individuals colonize a distant locality and start a new population, the allele frequencies of the gene pool
may be different than those in the original population. This is known as ____.
a. the founder effect b. a population bottleneck c. genetic equilibrium d. the Hardy—Weinberg principle e. natural selection
What type of cell does HIV infect?
A. helper T cells B. B cells C. red blood cells D. phagocytic cells E. All of the answer choices are correct
Rock layers right at the K-Pg boundary have enriched concentrations of the element iridium. This is significant for understanding the mass extinction that happened at the time, because ________
A) iridium is toxic to life and could have killed off many species B) iridium is very rare in the Earth's crust but relatively common in meteorites C) iridium forms under conditions of extreme shock and heat D) iridium would have caused an episode of severe acid rain E) iridium-rich dust is particularly effective at blocking incoming solar radiation