Which statement is true about fossils? a. Only the remains of animals, and not plant, can be made into a fossil.
b. To officially be a fossil, the remains of an entire organism must be found.
c. The remains of an organism that lived 500 years ago is called a fossil.
d. A fossil is any trace of prehistoric life.

Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: