The cells at the end of meiosis I are not ready to function as gametes. Why not?
A) The chromosomes have divided, but there has been no cytokinesis.
B) The homologous chromosomes have not yet separated.
C) They have the right number of chromosomes but too much cytoplasm.
D) They are haploid, but the chromosomes are still in duplicated form.
E) They have the right number of chromosomes but no cytoplasm.
Answer: D
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Which of the following is the terminology for an organism at the top trophic level of the food chain?
a. primary producer b. secondary producer c. apex consumer d. secondary consumer
The organism in the above figure would have
a. complex vascular systems. b. complex excretory systems to withstand marine water. c. few vascular systems because the cells are near the surface. d. thick cuticles to withstand dehydration. e. none of these.
The major model of vesicle fusion holds that the specificity of a vesicle fusing with its target membrane lies in the interaction of pairs of proteins called v- (vesicle) and t- (target)
a. SNAREs. b. SNAPs. c. COPs. d. NSFs.
Which group has the highest concentration of urea in their body fluids?
A. cartilaginous fishes B. marine bony fishes C. birds D. freshwater bony fishes E. reptiles