Which of the Following Statements Would Be Least Acceptable to Most

question 63

Multiple Choice

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

• A)The extant lancelets are contemporaries,not ancestors,of vertebrates.
• B)The first fossils resembling lancelets appeared in the fossil record around 530 million years ago.
• C)Recent work in molecular systematics supports the hypothesis that lancelets are the basal clade of chordates.
• D)The extant lancelets are the immediate ancestors of the fishes.
• E)Lancelets display the same method of swimming as do fishes.

---

Definitions:

Genetic Sex

An individual's sex as determined by their DNA, typically characterized by XX chromosomes for females and XY chromosomes for males.

Prenatal Development

The progression from fertilization to delivery, happening inside the uterus.

Sex Glands

Organs that produce sex hormones and gametes, playing a critical role in sexual reproduction and secondary sexual characteristics.

Cognitive Development Theory

A psychological theory that describes how human beings acquire, construct, and use knowledge as they grow and develop.