Ediacaran organisms lived during the _____ period.
A. Jurassic
B. Silurian
C. Devonian
D. Cambrian
E. Precambrian
E. Precambrian
Biology & Microbiology
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A large portion (45%) of the human genome is composed of
A. introns. B. exons. C. templates. D. transposons. E. pseudogenes.
Biology & Microbiology
Coccolithophores use ________ for a method of swimming
a. flagellates b. cilia c. appendages d. jet propulsion
Biology & Microbiology
Which of these events occurs normally in swallowing?
A) The larynx rises. B) The epiglottis rises. C) The bolus rises. D) The esophagus closes.
Biology & Microbiology
Sperm and egg cells contain half the number of chromosomes found in somatic cells, and are referred to as ________, which comes from the Greek word haploos, meaning "single."
Fill in the blank(s) with correct word
Biology & Microbiology