TLS Online TPP Program

#Question id: 8897


Which of the following statements would be least acceptable to most zoologists?

#SCPH28 | Zoology
  1. The extant cephalochordates (lancelets) are contemporaries, not ancestors, of vertebrates.
  2. The first fossils resembling cephalochordates appeared in the fossil record around 550 million years ago.
  3. Recent work in molecular systematics supports the hypothesis that cephalochordates are the most recent common ancestor of all vertebrates.
  4. The extant cephalochordates are the immediate ancestors of the fishes.
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TLS Online TPP Program

#Question id: 5218

#SCPH06 I Botany

Several of the different globin genes are expressed in humans, but at different times in development. What mechanism could allow for this?

TLS Online TPP Program

#Question id: 5218

#SCPH28 | Zoology

Several of the different globin genes are expressed in humans, but at different times in development. What mechanism could allow for this?

TLS Online TPP Program

#Question id: 5219

#SCPH06 I Botany

What is it that can be duplicated in a genome?

TLS Online TPP Program

#Question id: 5219

#SCPH28 | Zoology

What is it that can be duplicated in a genome?

TLS Online TPP Program

#Question id: 5220

#SCPH06 I Botany

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

TLS Online TPP Program

#Question id: 5220

#SCPH28 | Zoology

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?