What situation is more likely to cause speciation?
What will be an ideal response?
Ans: Separate populations
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In systemic lupus erythematosis (called lupus), complexes of antibody and antigen form, and these immune complexes insert themselves into small blood vessels, joints, heart, and kidney, causing damage to the organ tissue. The course of the disease is unpredictable, with periods of illness alternating with remissions. How is lupus, a type III autoimmune disease, similar to the tuberculin reaction, a type IV hypersensitivity reaction?
A. Both lupus and the tuberculin reaction involve large amounts of antibody production. B. Both lupus and the tuberculin reaction utilize IgE in their mechanisms. C. Both lupus and the tuberculin reaction are immediate hypersensitivities, occurring within a few hours. D. The mechanism of both lupus and the tuberculin reaction involve large amounts of inflammatory chemicals released into tissue.
The facial features seen in the child pictured here are characteristic of what syndrome?
1.Down syndrome
2.Trisomy 13
3.fetal alcohol syndrome
4.Cri du chat
The earliest style of stone tools, dating as far back as 2.6 million years, is called ________
Fill in the blank(s) with correct word
Many neurotransmitter receptors are chemically activated ion channels known as:
a. ligand-gated channels. b. metabotropic channels. c. voltage-gated channels. d. G protein-coupled channels. . e. neurotransmitter-selective channels