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Questions in biology

[Answered] 4) Fixed macrophages that are found in the liver are called A) Alveolar macrophages C) Peritoneal macrophages B) Microglial cells D) Kupffer's cells 15) Which of the following organisms has the ability to escape from a phagosome before it fuses with a lysosome? A) Shigella C) Plasmodium B) Chlamydia D) Leishmania 16) Complement proteins are numbered A) 1 to 6 B) 1 to 7 C) 1 to 8 D) 1 to 9 17) Some bacteria evade the complement system by means of their A) Endospores B) Flagella C) Cilia D) Capsules 18) Which of the following is NOT a physical form of defense for the respiratory and gastrointestinal tracts? A) Mucus B) Cilia C) Hairs D) Epidermis 9) What opsonizes, promotes inflammation, and punches holes in membranes of bacteria? A) The complement system B) Antimicrobial peptides C) Iron-binding proteins D) Interferons What do the activated macrophages secrete to further promote the inflammatory response? A) Prostaglandins B) Leukotrienes C) Cytokines D) Histamine

[Answered] Oncogenes are created by mutations in A. DNA repair genes B. Mitochondrial genes C. Proto-oncogenes D. Tumor suppressor genes

[Answered] A few years after a major oil spill, which area is most fragile in terms of its biodiversity? A. Benthic areas B. The polar waters C. The middle water D. Tropical areas

[Answered] The fossil record provides evidence of gradual changes in species over time. True False

[Answered] The presence of organic material in soil makes it more productive for plant growth. Please select the best answer from the choices provided. T or F

[Answered] What term describes the tissue layer directly below the epidermis? A. Adipose tissue B. Lipocytes C. Dermis D. Epithelial

[Answered] Which biological process involves the accumulation of toxins and pollutants in the upper levels of a food chain? A. Biomagnification B. Competitive exclusion C. Phosphorylation D. Photosynthesis

[Answered] A population with high genetic diversity is more likely to survive environmental changes. True False

[Answered] Which lobe of the cerebrum lies posterior to the parietal lobe and extends over the cerebellum? A. Temporal lobe B. Frontal lobe C. Occipital lobe

[Answered] Ecological change in a community following a major disturbance is called A. evolution B. succession C. diversity D. stability