Toxic dinoflagellates can directly harm other organisms during bloom periods by secreting their toxins in the water or by being consumed and concentrated in the tissues of filter-feeding organisms. Can you think of ways in which blooms of non-toxic dinoflagellates may harm other organisms in the water?
What will be an ideal response?
A bloom of non-toxic dinoflagellates can cause a serious reduction in the nutrients available for other autotrophic organisms in the area of the bloom. Once these dinoflagellates deplete the nutrients in the water, they die and are decomposed by microbes. This decomposition can lead to the depletion of oxygen in the water column, which can harm other organisms. Finally, a bloom of non-toxic dinoflagellates can reduce the clarity of the water column, leading to the reduction in the amount of available light to benthic photosynthesizers.
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Suppose you discovered a new amino acid. Its R-group contains only hydrogen and carbon atoms. Predict the behavior of this amino acid
A) It is hydrophobic. B) It is hydrophilic. C) Relative to the amino acids found in organisms, its interactions with water will be intermediate. D) Relative to the amino acids found in organisms, its interactions with water will be very high.
Most enzymes function best at
A. acidic pH and high salt concentrations. B. basic pH and low salt concentrations. C. neutral pH and high salt concentrations. D. slightly above pH 7 and low salt concentrations.
What is the sudden withdrawal of one's hand from a hot stove?
A) learning B) common sense C) an instinct D) a reflex
The trachea and upper bronchial tree are similar in that both are held open by cartilaginous rings.
Answer the following statement true (T) or false (F)