The morphological species concept involves the identification of certain structural traits, called ________, to distinguish one species from another.
A. analogous traits
B. convergent traits
C. homologous traits
D. diagnostic traits
Answer: D
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Which of the following describes the difference between fungal endomycorrhizae and fungal endophytes?
A. Endomycorrhizae live inside fungi and provide them with nutrients and water, and endophytes live inside plants, often parasitizing them and slowly breaking down their structure. B. Endomycorrhizae form arbuscules that facilitate exchanges of water and food between the fungus and plant root cells, whereas endophytes invade plant cells and provide the plant with protective antibiotics and toxins. C. Endomycorrhizae are beneficial to its host plant but endophytes harm the host plant. D. Endomycorrhizae form arbuscules on plant roots that produce toxins killing parasitic nematodes, whereas endophytes assist in the transport of water through the plant. E. None of these are correct.
Which statement describes a home heating and cooling system that functions in a homeostatic way?
A. The temperature always stays the same. B. The heater never comes on. C. The heater is on at a constant rate. D. The thermostat keeps the temperature within a narrow range.
Ticks can live on dogs, cats and other mammals. The ticks benefit but the mammal is harmed. This relationship is called
a) parasitism b) commensalism c) competition d) mutualism
All of the changes that occur starting from the time an egg is fertilized and continuing through childhood, adolescence, and adulthood are called
A. evolution. B. homeostasis. C. development. D. metabolism. E. reproduction.