What is true of an atom's nucleus? a. it is negatively charged and takes up most of the atom's space. b. it is positively charged and takes up most of the atom's space. c. it is positively charged and includes most of the atom's mass. d. it is negatively charged and includes most of the atom's mass.

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10

Which hormone is used by both males and female?