Which of these best describes a lacteal?
a) special capillaries in the villi designed for absorbing food effectively
b) a projection of the small intestine wall designed to increase surface area
c) a lymphatic vessel designed to introduce fats to the blood
d) a deep pocket in the intestinal wall where endocrine and antimicrobial cells are located

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.