What happens if homeostasis is NOT maintained?
A) Organisms stop using negative feedback loops.
B) Cells lose the ability to carry out normal functions.
C) Organisms function better.
D) Cellular metabolism is unchanged.
E) Cells begin dividing uncontrollably.
B
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Erosion of soils is of major concern throughout the world and happens mostly because of what factor?
A. Soils are exposed and not covered by plants. B. heavy rainfall C. Soils are exposed to winds. D. Soils are not kept fertilized. E. Soils are frequently flooded.
Why aren't viruses classified as living organisms?
A) Viruses don't possess a nucleus. B) Viruses aren't capable of replicating themselves without a host cell. C) Viruses don't always contain DNA as their genetic material. D) Viruses don't contain any proteins.
What is the correct sequence of structures through which the filtrate would pass?
1) Bowman's capsule 2) collecting duct 3) distal convoluted tubule 4) proximal convoluted tubule 5) ascending loop of Henle 6) descending loop of Henle a. 1 ? 3 ? 4 ? 5 ? 6 ? 2 b. 1 ? 4 ? 5 ? 6 ? 3 ? 2 c. 1 ? 6 ? 5 ? 4 ? 3 ? 2 d. 1 ? 3 ? 4 ? 2 ? 6 ? 5 e. 1 ? 4 ? 6 ? 5 ? 3 ? 2
Most inherited human disorders are the result of
a. recessive mutations of genes located on autosomes. b. dominant mutations of genes located on the X chromosome. c. recessive mutations of genes located on the Y chromosome. d. simultaneous mutations of the same gene on homologous chromosomes.