What manner of symbiosis is a root nodule? Explain. What will be an ideal response?
A root nodule is an example of mutualism. The plant provides carbohydrates and an oxygen-free
environment (necessary for nitrogen fixation) while the bacteria provide nitrogen (commonly limiting
in soils) for the plant partner.
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Glycolysis
A. is also known as the Embden-Meyerhof-Parnas pathway. B. is also known as the Entner-Duodoroff pathway. C. is used by Pseudomonas and a few other bacteria. D. generates some energy and NADPH. E. is also known as the Entner-Duodoroff pathway AND is used by Pseudomonas and a few other bacteria.
Gyres are divided into the following types of currents (named below) except
a. Ekman spiral. b. eastern boundary. c. western boundary. d. transverse.
The molting hormone of arthropods is:
a. corticotropin b. MSH c. oxytocin d. ecdysone e. adrenalin
Cooksonia is a genus of very early tracheophyte plants. Unlike modern tracheophytes, they only grew to a few centimeters in height. What feature provides the best explanation for their diminutive size?
A. Cooksonia species were not autotrophic. B. They consisted of only photosynthetic stems, not roots or leaves. C. They completely lacked vascular tissues. D. They did not have stomata.