Nonvertebrate chordates, tunicates, and lancelets, differ from other chordates in that
What will be an ideal response?
the notochord of nonvertebrate chordates does not become a vertebral column.
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What do enzyme-linked receptors and growth factor receptors have in common?
A. Both possess kinase activity when bound to a hormone. B. Both regulate specific G proteins when bound to a hormone. C. Both act as transcriptional factors. D. Both regulate the transport of ions through channels. E. Both seldom affect the expression of genes within the nucleus.
Some animals, like humans, have two eyes on the front of the head that perceive a mostly overlapping visual field. In
contrast, some herbivores (rabbits, for example) have eyes on the sides of their head and visual fields that may not overlap at all. How does this impact perception of the environment?
a. Humans have better depth perception and a wider field of vision than rabbits. b. Humans have poorer depth perception and a narrower field of vision than rabbits. c. Humans have better depth perception and a narrower field of vision than rabbits. d. Humans have poorer depth perception and a wider field of vision than rabbits. e. Due to integration by the brain, there is really no difference in depth perception or visual field size when comparing humans to rabbits.
In eukaryotes, photosynthesis takes place inside the ________.
A. cytoplasm B. chloroplasts C. mitochondria D. Golgi apparatus
Which process seems to be the most similar between eukaryotic and prokaryotic genetic regulations?
A) 5'-capping regulation B) RNA splicing regulation C) intron/exon shuffling D) transcriptional regulation E) poly(A) tail addition