Which process uses special proteins on the surface of the membrane to identify specific molecules for transport into the cell?
a. phagocytosis
b. pinocytosis
c. receptor-mediated endocytosis
d. exocytosis
c. receptor-mediated endocytosis
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Which of the following statements about insect hormones is false?
A. High levels of circulating juvenile hormone inhibit molting. B. Ecdysone is released from the prothoracic gland and stimulates molting. C. PTTH stimulates the release of ecdysone to trigger molting and metamorphosis. D. In the absence of juvenile hormone, an insect will metamorphose into the adult form. E. None of the answer options is false.
What activates protein kinase C?
a. IP3 b. DAG c. cAMP d. PIP2 e. calcium ions
All types of internal fertilization require
A. specialized anatomical structures. B. transfer of a spermatophore to the female reproductive tract. C. a terrestrial environment. D. a penis in the male.
Answer the following questions true (T) or false (F)
1. Normal microbiota may cause disease if conditions change in the body. 2. A syndrome is a group of symptoms and signs that collectively characterize a particular disease. 3. All diseases go through the stages known as incubation period, prodromal period, and illness.