Aluminum is an element. Which best describes what makes up a sample of aluminum?

one kind of atom

O two different kinds of atoms

all carbon-based atoms

a carbon atom and non-carbon atoms

Answer first and you get brainilest mark Which of the following is true about phylogenetic relationships and phylogenetic trees? They show how much time has passed between speciation.

Explain blood flow through the heart

What do plant and animal cells have different

What is the most likely explanation for the smaller size of the hypoxic zone in the year 2000? Select one: a. An increase in fertilizer dumping in rivers b. Decrease in the amount of sediments carried into the Gulf c.

Question 1 of 20 : Select the best answer for the question. 1. Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive).

The purpose of oxygen in the body is to serve as the

How do somatic and inherited mutations differ? A. Somatic mutations exist in all cells in the body and inherited mutations only exist in the cell type that mutated. B. Somatic mutations only affect males and inherited mutations affect any gender. C.

What are the two major organ systems in plants

Mitosis occurs where in the body? Where does meiosis occur?

Which organ suffers the least damage during prolonged starvation?