Park officials needed to repair the old mill dam in a state park and so had to drain the pond behind it, killing all the animals and many of the plants in the water
After the pond reformed and many years passed, a certain species of fish established itself in the pond and remained there for more than 400 years. Which most directly describes the role of that type of fish? A) climax species
B) pioneer
C) producers
D) invaders
A
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All of the following are methods of prion disease transmission EXCEPT
A. organ or tissue transplantation. B. inheritance (genetic). C. contamination through use of inadequately processed surgical instruments. D. ingestion of infected tissue. E. inhalation (airborne).
Cells can be described as having a cytoskeleton of internal structures that contribute to the shape, organization, and movement of the cell. All of the following are part of the cytoskeleton except
a. the nuclear envelope. b. microtubules. c. microfilaments. d. intermediate filaments. e. actin.
Which of the following nutrients would yield the most energy per gram?
A) Minerals B) Proteins C) Vitamins D) Carbohydrates E) Lipids
Adult stem cells are always unipotent.
Answer the following statement true (T) or false (F)