Which of the following represents the smallest functional unit of living organisms?

A. atoms
B. molecules
C. proteins
D. water
E. salt


A. atoms

Biology & Microbiology

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Which of the following animals reproduce through internal fertilization?

a. Crabs b. Frogs c. Oysters d. Chickens

Biology & Microbiology

This type of cell is closely associated with a companion cell

a. sieve tube member b. tracheid c. vessel elements d. sclerenchyma e. collenchyma

Biology & Microbiology

Which of the following hormones is NOT

related to sexual reproduction?

a. GnRH b. ACTH c. LH d. FSH e. all of these are hormones related to sexual reproduction

Biology & Microbiology

The outer layer of skin is mostly __________

epithelium. a. simple squamous b. simple cuboidal c. stratified squamous d. simple columnar e. stratified cuboidal

Biology & Microbiology