Which organism has a single Loop circulatory system

A. frog

B. human

C. fish

D. dog

The element of symbols: symbols to know

What organelle would muscle cells have a lot of and why?

This is a fossil that is a copy of an organism's structure, formed when minerals seep into a mold in sediment.

Why is the a shell considered to be biotic

Which best describes what meteorologists study? O A. Earth's weather systems and atmosphere O B. The movement of meteors, asteroids and comets O C. Rocks on Earth and other planets O D. The movement and distribution of water and ice on Earth

How might a strawberry plant depend on birds? A. The birds provide shade to the strawberry plant. B. The birds eat insects that would destroy the plant. C. The birds eat the strawberries so the plant cannot reproduce anymore. D.

Which phase occurs directly after G1? A. S phase B. M phase C. Cytokinesis D. G2

Which describes the correct pairing of DNA bases? O A. A with T, and C with G O B. A with A, and G with G O C. A with G, and C with T O D. A with C, and T with G

How to have self control over heart rate?

1. All of the following would result in a change in population size except A. emigration of individuals out of the population range. B. equal birth and death rates. C. immigration of individuals into the population range. D.