Which one of the following quantities best represents the respiratory heat lost by plants in an ecosystem? 

A. gross primary productivity
B. net primary productivity
C. gross primary productivity - net primary productivity
D. gross primary productivity - standing crop biomass
E. gross primary productivity - secondary productivity


C. gross primary productivity - net primary productivity

Biology & Microbiology

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Which of the following is a common cause of

interrupted breathing? a. sleep apnea b. lung cancer c. high altitude sickness d. low red blood cell count e. none of these

Biology & Microbiology

the molecule that stores the energy of glucose in plants

What will be an ideal response?

Biology & Microbiology

Which statement regarding the scientific method is FALSE?

(a). Inductive reasoning is used to form a hypothesis. (b). Observations are used to form a hypothesis. (c). Experiments need to be repeatable. (d). Original hypotheses are formed after an experiment. (e). The control and experimental group are identical except for one variable.

Biology & Microbiology

Which of the following antiviral drug categories is incorrectly matched with its description?

A) Nucleotide reverse transcriptase inhibitors: Target retroviruses B) Nucleoside analogs: Mimic normal nucleotides interfering with nucleic acid replication C) Interferons: Used for postexposure prophylaxis D) Proteases: Target protein-cutting enzymes which make mature virons E) Antisense antivirals: Short sequences of nucleotides that are complementary to viral RNA

Biology & Microbiology