The spindle attaches to chromosomes at the _____
a. centriole
b. contractile ring
c. centromere
d. centrosome
e. telomere
c
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A horseshoe crab uses its long extended spine
for what purpose?
a. defending its territory b. digging for clams c. fighting for mates d. protection from predators e. flipping itself right side up
The first committed step of Krebs cycle is:
a. acetylCoA synthesis b. oxaloacetate regeneration c. citrate synthesis d. isocitrate dehydrogenation e. pyruvate decarboxylation
What dosage compensation mechanism is employed by female placental mammals?
A) synteny B) Y-inactivation C) X-inactivation D) X nondisjunction E) X chromosome crossing over
___ are geographical areas that contain high numbers of endemic species.
a) Biodiversity hotspots b) Wildlife preserves c) Buffer zones d) Biomes