Sponges reproduce
a. sexually in a way favoring cross-fertilization.
b. sexually in a way favoring self-fertilization.
c. asexually with sperm only.
d. none of the above

Which osmotic and ionic strategies must marine teleost fishes employ?

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Which of the following statements are true chromosomes make up genes