Suppose that before examining a fungal cell under a microscope, you are told that it is a dikaryotic cell. What should you expect the cell to have?
a. two complete sets of chromosomes and two mycelia
b. two complete sets of chromosomes and two hyphae
c. two complete sets of chromosomes and two nuclei
d. two nuclei and two hyphae
Ans: c. two complete sets of chromosomes and two nuclei
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a. fusion b. binary fission c. sex d. meiosis e. cell joining
A saltwater fish tends to be ________ to its surrounding aquatic environment
A) endothermic B) isoosmotic C) hyperosmotic D) hypoosmotic
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During the late 1800s, cattle egrets arrived in South America from Africa and began to colonize. Their range has expanded dramatically over the years. Why were they able to do this?
A. The habitats that they left in Africa were not suitable for any further colonization; thus, they were forced to emigrate. B. The habitats that they encountered in South America were suitable to them and unoccupied. C. The food resources in South America were far superior to those in Africa, allowing the egrets more opportunity to grow and reproduce and ultimately expand their range. D. There were abundant cattle for the birds to gather around in South America; furthermore, various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching, causing the birds to extend their range.