Some species of cuckoos lay their eggs in the nest of other birds, forcing the other bird to raise the young of the cuckoo. This would be a type of ________.
a) parasitism
b) predation
c) commensalism
d) mutualism
Answer: a) parasitism
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You are a doctor examining a patient whose thymus never developed because of a medical condition called DiGeorge syndrome. You know that this medical condition is usually due to the deletion of a section of chromosome #22
The karyotype of this patient shows one copy of chromosome #22 that is of normal length and one copy that is shortened. This indicates that the genotype of this patient is _______________ and that the expression of this trait is _____________. A. Homozygous dominant; dominant B. Heterozygous; dominant C. Heterozygous; recessive D. Homozygous recessive; recessive
Comparison of mitosis and cytokinesis in animal versus plant cells reveals ____
a. sister chromatids are identical in animal cells, but they differ from one another in plants b. a cleavage furrow is initiated in an animal cell, while a cell plate begins to form in plant cells during telophase c. in animal cells, chromosomes do not become attached to the spindle until anaphase, whereas chromosomes become attached to the spindle at prophase in plant cells d. the nuclear envelope disintegrates in prophase in animal cells, but remains intact in plant cells e. There are no differences between animal and plant cells.
Meiosis produces
a. sperm cells. b. egg cells. c. body cells. d. sperm and egg cells. e. sperm, egg, and body cells.
A botanist examines two plants. Plant A has large colorful petals; plant B has extremely tiny white flowers. Which one is most likely animal pollinated?
A. Plant A B. Plant B