Which one of the following is an example of potential energy? Select all correct choices
A. a moving muscle
B. light
C. heat
D. an electrochemical gradient
E. wind
Answer Key: D
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Four of the five answers below are correct statements about seedless vascular plants. Select the exception
a. Sporophytes are independent of gametophytes. b. Water is not needed for gamete transport. c. Sporophytes have vascular tissue. d. Seeds are not produced. e. Living members still exist.
Scientists hypothesize that ____ served as a primitive template for forming polymer chains from organic subunits,
such as amino acids.
a. meteorites that landed in the oceans b. clay particles in tidal flats c. sulfur that precipitated out of hydrothermal vents d. rusty rocks e. magma spewed from early volcanic activity
When a species of bird preys upon the seeds of a plant and favors the smallest seeds,
A) the prey species functions as an agent of natural selection on the predator. B) natural selection favors individual plants that produce the largest seeds. C) the plants compensate for their losses by producing proportionately more smaller seeds. D) the bird species is unaffected when directional selection favors plants that produce the largest seeds.
Which organelle are involved in energy conversion?
A. mitochondria and chloroplast B. mitochondria and ribosomes C. smooth and rough endoplasmic reticulum D. Golgi Apparatus and chloroplasts