Hammer-head bats are a species of African fruit bats. During the breeding season, males gather in mating arenas, where they display to females who pass through and assess males before selecting individuals with which to mate
This is an example of
____ (intra/inter) sexual selection.
Fill in the blank with the appropriate word.
inter(sexual)
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Many parabasalids lack ________, which makes them different than most other eukaryotes
A) endoplasmic reticula B) introns in their genomes C) mitochondria and hydrogenosomes D) Golgi complexes
Referring to the above diagram, which
structure is responsible for secreting digestive enzymes into the small intestine and hormones into the blood?
a. D b. E c. F d. G e. A
Light levels in the _____ are too low to support photosynthesis.
Fill in the blank(s) with the appropriate word(s).
Which statement concerning body symmetry is NOT correct?
A. Asymmetrical animals have no body shape. B. Radial symmetry is useful because the animals can reach out in all directions. C. Bilaterally symmetric animals are usually sessile. D. In radial symmetry, two identical halves are obtained regardless of how the animal is sliced longitudinally. E. The evolution of bilateral symmetry is accompanied by cephalization.