Movement is provided by contractions of ______ tissue.
A. epithelial
B. connective
C. muscle
D. nervous
E. All of the answer choices are correct.
C. muscle
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The majority of all known animal species are:
A. flowering plants. B. cnidarians. C. vertebrates. D. insects.
The work of Walter Sutton and Theodor Boveri suggested that the hereditary units, or genes, described by Mendel are located on ________
Fill in the blank(s) with correct word
All of the following are characteristic of life in a marine environment except?
a. Many nutrients and gases are dissolved in the water and are readily available. b. Buoyancy helps to support the organisms. c. Currents may wash organisms away from suitable habitats. d. Osmotic balance is very difficult for invertebrates to maintain. e. Temperatures are relatively stable.
All scientific study begins with ________ and the formation of testable hypotheses
Fill in the blank(s) with correct word