The neutrons of an atom are
A. found in the nucleus.
B. positively charged.
C. used to determine atomic number.
D. moving in pathways called orbitals.
E. always equal to the number of protons in an atom.
Answer: A
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Restricted by water availability; 20 degrees to 30 degrees latitude; hot sunny days, cold nights; annuals; shrubs with long roots; succulents.
A. desert B. savanna C. taiga D. temperate grassland E. tropical rain forest
Answer the following statements true (T) or false (F)
1. In red-winged blackbirds, females tend to choose males with the most desirable territories and males compete with each other for territories. Redwing blackbirds demonstrate both intersexual selection and intrasexual selection. 2. Cryptic female choice is a type of intrasexual selection. 3. A population undergoing microevolution would show Hardy-Weinberg disequilibrium. 4. The Mexican axolotl (Ambystoma mexicanum) is an amphibian that has a derived mode of development characterized by metamorphic failure. This mode of development results in an entirely aquatic life cycle and is an example of paedomorphosis.
Which of the following statements regarding red tides is incorrect?
A. Red tides are also known as harmful algal blooms (HABs). B. Red tides result from an overgrowth of dinoflagellates. C. Toxins produced by dinoflagellates are skin irritants. D. Dinoflagellates produce a toxin that causes paralytic shellfish poisoning.
A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. Since the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed. Suppose a plant has a unique photosynthetic pigment and the leaves of this plant appear to be reddish yellow. What wavelengths of visible light are absorbed by this pigment?
A) red and yellow B) blue and violet C) green and yellow D) blue, green, and red