The __________ that facilitates cytokinesis in animal cells cannot work with plant cells because a stiff cell wall surrounds their __________.
Fill in the blank(s) with the appropriate word(s).
contractile ring; plasma membrane
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As a result of nondisjunction, an individual with Turner syndrome is genotypically XO, lacking one of the sex-determining chromosomes. Taking this into account, the fusion of the gamete containing the extra chromosome with a normal gamete could result in an individual with the genotype
A) XXX. B) XXY. C) XYY. D) A or B E) A, B, or C
Based on this diagram, which organisms evolved more recently?
a. humans and pigs b. moths c. tuna d. yeast
Mammals appeared 220 MYA but did not begin to greatly diversify until 65 MYA - why? What will be an ideal response?
Which is a characteristic of the phylum Chordata?
A. They have a notochord. B. They have a pseudocoelom. C. They do not have true tissues. D. They have a gastrula with only two germ layers.