Which type of fossil is considered a trace
fossil?
a. footprint
b. shell
c. seeds
d. teeth
e. spores
A
You might also like to view...
Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The flower color trait in radishes is an example of which of the following?
A) a multiple allelic system B) sex linkage C) codominance D) incomplete dominance
Which animal is a chordate?
a. sea star. b. sea cucumber. c. acorn worm. d. lancelet.
Essential organic substance that are used in only tiny amount by the body are called
A. trace elements B. hormones C. vitamins D. minerals
Complement helps in the defense against bacterial invasion by:
A. promoting phagocytosis. B. neutralizing bacterial toxins. C. preventing bacteria from penetrating the skin. D. fusing lysosomal granules to bacterial cell walls.