Nitrogen is a critical requirement for living organisms because it is a component of:
a. carbohydrates and lipids.
b. carbohydrates.
c. lipids and nucleic acids.
d. nucleic acids and proteins.
e. nucleic acids and carbohydrates.
d
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What group of flowering plants are best suited for marine life?
a. Marshgrasses b. Seagrasses c. Seaweeds d. Mangroves
Which event in the sequence of photosynthesis occurs before all the others in the list?
a. Energy carrier molecules ATP and NADPH are created b. Water is broken apart to donate an electron inside the thylakoid space c. Photons of light stimulate pigments within the thylakoid membrane inside of a chloroplast d. Electrons are transported down an electron transport chain e. Carbon dioxide is converted into sugar.
A symptom is ________.
A. measurable by health care personnel B. an objective indication of disease C. a temperature D. a subjective indication of disease
Which classification grouping includes the greatest number of species?
A) Domain B) Order C) Phylum D) Kingdom