Which of the following is not a reason Rocky Mountain spotted fever should be diagnosed within the first few days of an infection?
A) A schizophrenia-like illness or mood disturbances may result.
B) Untreated cases can be fatal in as few as eight days.
C) Fatal organ or brain bleeding may occur.
D) Limb amputation may be required due to necrosis.
E) It may cause blood vessel damage that impacts circulation to the arms and legs.
Answer: A
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Which of the following is considered to be a plant behavior?
A. response to sunlight B. response to plant hormones C. response to touch D. response to gravity E. all of the choices
The protein Sonic Hedgehog (SHH) plays a role in specifying the identity of digits (such as fingers and toes) in mammals. Several digits arise directly from cells that both express and respond to secreted SHH. What type of signaling would this be considered?
A. Direct contact B. Paracrine C. Endocrine D. Synaptic E. Autocrine
In the technique of embryo splitting, _____
a. two embryos are fused b. an embryo is split apart to form two identical individuals c. two sperm are used to fertilize a single egg d. two eggs and two sperm are used to form two embryos e. an embryo’s nucleus is removed and replaced with an adult embryo
An interaction between two species in which both
species benefit is a. mutualism. b. parasitism. c. commensalism. d. competition. e. predation.