Question

Genes:

		function as templates for producing proteins.
		produce human chromosomes.
		produce human DNA.
		produce mainly waste material

Link the correct terms about prenatal development to the following descriptions: (1) union of sperm and egg; (2) first cell; (3) first phase of prenatal development; (4) structure that implants in the uterine wall.

		(1) fertilization; (2) zygote; (3) germinal period; (4) blastocyst
		(1) germinal period; (2) zygote; (3) blastocyst; (4) zygote
		(1) blastocyst; (2) zygote; (3) germinal period; (4) fertilization
		(1) zygote; (2) blastocyst; (3) fertilization; (4) germinal period

During the embryonic period, _____ is/are formed.

		the neural tube alone
		the arms and legs alone
		the circulatory system alone
		every major body structure

Answer 1

1. function as templates for producing proteins.

2. 1) fertilization; (2) zygote; (3) germinal period; (4) blastocyst

3. every major body structure