Which of the following is not characteristic of ciliates?
a. They use cilia as locomotory structures or as feeding structures.
b. They are relatively complex cells.
c. They can exchange genetic material with other ciliates by the process of mitosis.
d. Most live as solitary cells in fresh water.
e. They have two or more nuclei.
Ans: c. They can exchange genetic material with other ciliates by the process of mitosis.
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In adult arthropods, the hemocoel _____
A) provides space for the internal organs to grow and function B) forms a cavity to protect the visceral mass of organs C) acts as a hydrostatic skeleton for mobility D) secretes the exoskeleton
Woolly adelgids are insects that were accidentally brought to the United States from Japan. How have they impacted the ecosystems here in the United States? Select all that may apply.A) They infect hemlock trees, causing their quick deaths.B) Less dense shrubs replace dead hemlocks, reducing soil moisture and temperature.C) Amphibians are displaced because of soil moisture and temperature changes.D) Mature trees replace hemlocks, increasing shade cover to the underbrush below.E) As soil moisture and temperature changes, amphibian diversity increases.
What will be an ideal response?
Which of the following shows seasonal isolation?
A. Frogs mate in the spring and deer mate in the fall. B. The pollen of different species of pine trees mature at different times. C. The tulips bloom earlier in Tennessee than in New York. D. None of these answers is correct.
Match the microscope part with it's function.
Condenser A) Focus light onto the specimen B) Control the amount of light reaching the specimen C) Brings the specimen into general focus D) Increases the detail of the image