This year will have a February 29th if, and only if, this is a leap year. Which word phrase in the statement makes this a biconditional?

The endosymbiosis hypothesis proposes that a. a small cell lived inside a larger cell to the benefit of both cells. b. two cells merged into one cell, improving the enzyme function of the new cell. c.

Which of the following can fossils teach us about the Earth? A. the colors of flowers during the time they lived B. why plants are green C. how climates changed in different regions D. which organism could move the fastest in each era

Mental illness may be the result of: Environment Heredity Both Neither

Which type of cells tend to be multicellular; prokaryotes, eukaryotes, or both?

If a parent cell has 46 chromosomes and undergoes meiosis, each of the resulting cells will have how many chromosomes?

During the process of cellular respiration, energy is released from (1) carbon dioxide (3) water molecules (2) oxygen atoms (4) chemical bonds

Protist get energy by

10. What is a genotype? A an organism's combination of genes for a trait B an organism's appearance as a result of its genes C the ratio of dominant to recessive genes in an individual D the collection of dominant genes in an organism

How much of a person's weight is water?

What are the two components of the central nervous system in vertebrates?