The five substages of M phase are designed to accomplish two main goals: equal partitioning between the two cells of chromosomal material and of cytoplasmic contents. What are these two processes called?
What will be an ideal response?
karyokinesis and cytokinesis
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Answer the following statements true (T) or false (F)
1. Meiosis does not occur in gametophytes. 2. Although land plants, mosses are still tied to water because of their flagellated sperm. 3. The conspicuous green patches of mosses that you see in the woods are mostly sporophytes. 4. The conspicuous green parts of ferns that you see in the woods are mostly sporophytes. 5. Woody plants and herbaceous plants are the two major monophyletic clades of the seed plants.
A white cow was mated with a red cow, and they had an offspring who was roan – the calf had an even mixture of white hairs and red hairs covering her body. What is the most likely explanation of the inheritance of the roan coat?
A. red is dominant and white is recessive B. red and white are codominant C. incomplete dominance D. X-linked dominance E. pleiotropy
If an individual living in a northern climate has allergies in the late summer, it is most likely
due to
a. long-day plants. b. short-day plants. c. either short-day or long-day plants. d. There is not enough information given to determine which type of plant is involved.
Molecular/structural orientations (gradients) in an egg are thought to play a significant role in development. What is the origin of such gradients?
A) During early development, the nucleus is placed into position of the highest concentration. B) The side facing up has the lowest concentration of molecules. C) When an egg is fertilized, the gradient is set up based on the side of the egg on which the most mitochondria reside. D) During formation of the egg, nutritional as well as informational molecules (RNAs) are placed in appropriate positions for the development of the embryo. E) Where the sperm penetrated the egg is the area of highest concentration.