Which of the following does not occur during early cleavage of a frog zygote?
A) The developing cell undergoes mitosis.
B) The nuclear-to-cytoplasmic ratio of the two resulting cells increases.
C) The ratio of surface area to volume of the two resulting cells increases.
D) The embryo grows significantly in mass.
E) The developing cell undergoes cytokinesis.
Answer: D) The embryo grows significantly in mass.
You might also like to view...
What appears to be a dark side to telomerase activity with regard to human health?
A) Telomerase is active in most cancer cells. B) Telomerase is inhibited by p53. C) p53 inhibits telomerase. D) There are more chromosomal ends than can be repaired by telomerase. E) Telomerase activity is only seen in somatic cells, therefore, chromosome shortening is likely in gametic chromosomes.
Arsenic poisoning can lead to organ failure and death. Though arsenic can inhibit or interfere with a number of cellular enzymes, arsenic poisoning is thought to be mainly due to indirect inhibition of enzymes involved in both pyruvate oxidation and the Citric acid cycle. As a result, this compound must be able to enter which cellular compartment?
A. The intermembrane space of the mitochondria B. The cytoplasm C. The endoplasmic reticulum D. The nucleus E. The mitochondrial matrix
Adjacent plant cells frequently exchange cytoplasmic components through membrane-lined channels called plasmodesmata:
What will be an ideal response?
At the cellular level, the development of an animal from a fertilized egg involves cell division by _____
a. meiosis b. mitosis c. differentiation d. morphogenesis e. cloning