Which two structures are found only in plant cells?
a) vacuoles and ribosomes
b) chloroplasts and ribosomes
c) cell walls and chloroplasts
d) endoplasmic reticulum and cell walls

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?