Which of the following substances is used by plants as a reactant in photosynthesis?

A. carbon dioxide

B. glucose

C. oxygen

D. pyruvic acid

Why does warm temperature have the greatest affect on rocks during chemical weathering?

Which of the following is not a carbon sink? atmosphere the Atlantic Ocean Lake Superior All of the above are carbon sinks.

Which two actions happen when bonds in ATP molecules are broken?

There is a need for glucose inside a cell, but the glucose molecule is too large to pass through the cell membrane. How does the cell solve this problem?

What is the Difference between eukaryotic and prokaryotic cells?

The failure of homologous chromosomes to separate during meiosis is called a. skin disorders b. translocation. c. nondisjunction. d. Down syndrome.

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

The most obvious source of gene flow into any population is A) Emigration B) Immigration

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?1. primary structure2. tertiary structure3. secondary structure4.

A particular gene can have two forms, called alleles. which statement best describes the difference between the dominant allele and the recessive allele? (a) only the recessive allele is expressed when both alleles ate inherited.