The following picture is a _________ section of brain. (Cut down the middle line)
a. coronal
b. sagittal
c. horizontal
d. none of the above
Answer: b. sagittal
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A leaf that is found to have stomata and epidermal hairs in depressions in the leaf surface probably came from a plant that is adapted to a(n) ________ climate
a. arctic b. arid c. cool and rainy d. tropical
In aquatic ecosystems, the phosphorous cycle moves through three states: particulate organic phosphorous, dissolved organic phosphates, and ________ phosphates
Fill in the blank(s) with correct word
The Hardy-Weinberg principle is applicable provided:a
migration is limited to adults. b. migration only occurs during nonreproductive periods. c. migration is limited to juveniles. d. migration occurs at the beginning of the breeding season. e. migration does not occur.
Certain mobile Group I introns encode
a. reverse transcriptase. b. an endonuclease. c. DNA repair enzymes. d. an RNA-dependent DNA polymerase. e. an exonuclease.