Which structures found in ferns are lacking in mosses?

a. spores
b. gametophytes
c. xylem
d. sporophytes
e. flagellated sperm


ANSWER: c

Biology & Microbiology

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A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?

A. Physiological ecology B. Ecosystem ecology C. Organismal ecology D. Community ecology E. Population ecology

Biology & Microbiology

If the sunflowers represent 2400 calories, how many calories would be available at the level

of the possums that eat spiders?

a. 10 b. 2.4 c. 24 d. 1000

Biology & Microbiology

Because the smooth ER does not contain ____, it cannot produce proteins

a. Golgi bodies b. mitochondria c. ribosomes d. DNA e. lysosomes

Biology & Microbiology

In transcription, the base thymine in DNA will pair opposite the base ____ in mRNA. 

A. uracil B. guanine C. cytosine D. adenine

Biology & Microbiology