Which of the Following Statements Is False

question 69

Multiple Choice

Which of the following statements is false?

• A) In arthropods, the gene Distal-less causes legs to form from segments.
• B) In centipedes, the Hox gene Ubx activates expression of the gene Distal-less, causing legs to form from segments.
• C) A mutation in the Hox gene Ubx in the ancestor of insects resulted in legs forming from thoracic but not abdominal segments in this lineage.
• D) Changes in the spatial pattern of Hox gene expression can account for the different number of cervical vertebrae in mouse and chicken embryos.
• E) Morphological differences among species do not evolve through mutations in Hox genes.

---

Definitions:

Sexual Excitation

The arousal and increased physiological and sexual interest that can arise from psychological or physical stimuli.

Ovulation

The process in the female menstrual cycle where a mature egg is released from the ovary, making it available for fertilization.

LH

Luteinizing hormone, a hormone secreted by the anterior pituitary gland that plays a key role in controlling the function of ovaries in women and testes in men.

Corpus Luteum

A temporary endocrine structure in female ovaries, formed after ovulation, which secretes hormones, primarily progesterone, to maintain early pregnancy.