What is a muscle fiber?
A. A single cell of a muscle
B. A group of muscle cells that make up the
same muscle group
C. The myosin that makes up the contractile
unit of a muscle cell
D. The connective tissue outer covering of a
muscle
A
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If an allele is inherited on the X chromosome, but not the Y, it is said to be an example of ________
A. autosomal inheritance B. X-linked inheritance C. chromosome theory of inheritance D. homogametic sex E. heterogametic sex
What is a possible reason deep-sea animals can be much larger than their surface relatives? a. They acquire more nutrients
b. They need their size for protection. c. They have a longer lifespan. d. Larger sized animals can attract mates easily.
Humans breathe in air that contains nitrogen, oxygen, carbon dioxide, and trace amounts of thousands of pollutants
Indicate whether the statement is true or false
Organisms that must rely on complex, high-energy molecules produced by other organisms for survival are
A) heterotrophs. B) producers. C) autotrophs. D) cyanobacteria. E) denitrifying bacteria.