The basal cell in a plant embryo _____

A) develops from the root of the embryo
B) forms the suspensor that anchors the embryo
C) divides to form hypocotyls
D) divides to form cotyledons


Answer: B

Biology & Microbiology

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In response to increased carbon dioxide levels in the atmosphere, stomata in leaves of some species

have ________.

a. become smaller b. declined in number c. increased in number d. become encoded by the gene YDA e. become larger

Biology & Microbiology

Infants require many nutrients early in life, including lipids such as fats. A low-fat diet for infants is not recommended because, among other things, it can affect the development of the nervous system

Why does the developing nervous system need lipids? A) Glial cells need lipids to produce the myelin sheath. B) Fats are needed for energy because infants are often on a low-carbohydrate diet. C) Lipids are needed to produce the polypeptide neurotransmitters used by neurons. D) Fats are required to generate action potentials on nerve cells.

Biology & Microbiology

Racial differences most likely arose as adaptations to different ________

Fill in the blank(s) with correct word

Biology & Microbiology

Spirochetes move by means of

a) axial filaments. b) flagella. c) pili. d) fimbriae.

Biology & Microbiology