Which type of bond forms between two water molecules?

ionic

covalent

isotonic

hydrogen

how many atoms in the compound A1 (NH3) 2

A group of students is reviewing class material on sexually transmitted infections in preparation for a test. The students demonstrate an understanding of the material when they identify which of the following as the cause of condylomata? a.

Which is used by scientists to find out how different species are related? a. the locations of islands in an ocean b. the food an organism eats c. the order of amino acids in a protein

5 major air pollutants?

Metamorphic rock forms from other rock when it is subjected to significant changes in which of the following? Select all that apply. A. heat B. pressure C. deposition D. chemical environment

Rosa has a vegetable garden. She places earthworms, which are decomposers, in the garden soil. What is Rosa most likely trying to do? A. prevent insects from eating the plants B. create usable food energy for the plants C.

A transposable element (TE), or transposon, is a __ sequence that can change its __ within a genome, sometimes creating or reversing mutations and altering the cell's __.

How a biologist's reseach can proceed from an idea to a published article

How many times do the nostrils of a frog open and close in one minute

What regulates the enzymes present in an organism A. Phenotype B. Genotype C. Proteins D. Carbohydrates