The organs that produce sperm are the ovaries.

The gradual colonization of barren rocks is called _____.

What is the term used when humans breed better farm animals or plants over many generations by saving only the best varieties for breeding.

A ______ includes all the organisms inhabiting a particular area.

Fungi are made of multicellular ______________ or single cells.

Which answer choice below explains why red algae have their unique red color and how it helps them to live deep in the ocean.

Organisms reproduce following several patterns. Some organisms produce few offspring and provide parental care. Other organisms produce many offspring but provide little or no parental care. Which of the following organisms has the greatest risk of losing a population due to the death of only a few individuals?

Which pigment is most responsible for dark skin color?

1a. Vertebral column present – vertebrate 1b. Vertebral column absent go to (2) 2a. 3 or more body segments go to (3) 2b. 2 body segments go to (4) 3a. wings possible – insect 3b. no wings – millipede 4a. antennae absent – arachnid 4b. antennae present – crustacean According to the table and dichotomous key shown above, which of the following conclusions can be drawn about the organisms?

What structure protects the root as it pushes its way through the soil?