Why aren't insect tracheae associated with capillary beds?
A. Insect capillaries are found only around the gut.
B. Insects have an open circulatory system.
C. Insects have external gills associated with hemolymph vessels.
D. Insects use an air sac respiratory system.
B. Insects have an open circulatory system.
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Which of the following statements is (are) true?
a. All action potentials transmitted by the same neuron are alike. b. The brain assesses a stimulus in part by which neuron pathways are active. c. Different neurons convey different information by transmitting impulses to different areas of the brain. d. A strong stimulus recruits more receptors than does a weak stimulus. e. All of these are true.
Transcriptionally active genes show lower levels of DNA methylation compared with transcriptionally inactive genes
Indicate whether the statement is true or false
The pathogen that causes Legionnaires'pneumonia also causes a milder infection called Pontiac fever.
a. true b. false
A society:
A) is a network of human relations that includes ideas, institutions, and material things. B) refers to structures and processes that authoritatively make and apply rules. C) refers to a broad term encompassing a range of actions and institutions. D) is a basic way of seeing the BGS relationship.