Help please: What makes up cell membranes and is used to create hormones?
A. Starch
B. Hydrocarbon
C. Glucose
D. Cholesterol

All biomolecules have the following traits except:
A. a carbon backbone.
B. covalent bonds.
C. hydrogen elements.
D. nitrogen elements.

Which soil-based compounds do plants use to create amino acids from glucose?
A. carbon
B. fluoride
C. hydrogen
D. nitrogen

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals