In what disease do the larvae cause pulmonary symptoms?
a) Hookworms
b) Ascariasis
c) Trichinellosis
d) Pinworms
Ans: b) Ascariasis
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Which of the following provided the selective pressures that most directly promoted the evolution of photosynthesis?
a. the drop in surface UV radiation caused by the formation of the ozone layer b. the depletion of dissolved organic material from the oceans c. the ability of some organisms to use oxygen to generate ATP during respiration d. an increase in visible light intensity at the surface of the Earth, caused by solar flares e. an increase in volcanic activity and release of CO2 into the atmosphere
Flowering plants such as prairie grasses, corn, and many common trees do not have showy petals. Explain how these plants are pollinated
What will be an ideal response?
Root hairs are:a
flattened extensions of epidermal cells. b. formed once in the area of cell maturation. c. small in number. d. located in front of the root tip. e. short-lived
Homologous structures are found in organisms that share a common ancestry. They can be used to classify organisms. However, homologous structures may have different functions. Which of the following is an example of a homologous structure?
A) embryonic stages of development B) human tail bone C) human appendix D) forelimbs of vertebrates