The stemlike portion of a seaweed is called its
a. thallus.
b. holdfast.
c. stipe.
d. blade.
Ans: c. stipe.
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Fungi are ecologically important for all of the following reasons, except
A. They break down organic materials and return them to the ecosystem. B. All can exist in symbiotic relationships. C. Some can ferment and produce bread, beer, wine, cheese, and soy sauce. D. Some cause diseases in plants and animals. E. They can break down lignin.
For water transport in vascular plants, the cohesive property of water is most important in the
A) epidermis. B) xylem. C) internal air spaces. D) stomata.
The form of infection with Entamoeba histolytica that is frequently asymptomatic is known as (extraintestinal/dysentery/luminal) amebiasis
What will be an ideal response?
In the 1930s, the Navajo Nation treated sheep and cattle for ticks and other parasites by using concrete "dip tanks." Animals were herded through one end of the tank and out the other. Each day, the tanks were filled with 200,000 gallons of insecticide and any remaining chemicals were emptied onto the ground. The pesticide solution seeped into the ground, ditches, and pits around the tanks. This was a common practice in the United States during that period.