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Questions in biology

[Terjawab] What portion of the diencephalon acts as a relay station for sensory impulses traveling upward to the sensory cortex? A. pons B. thalamus C. hypothalamus D. pituitary gland

[Terjawab] What substance produces itching when released in response to allergens? A. Keratin B. Collagen C. Heparin D. Histamine

[Terjawab] A cross between white and yellow summer squash gave progeny of the following colors: | Color | White | Yellow | Green | |---|---|---|---| | Number of progeny | 155 | 40 | 10 | Are these data consistent with the [tex]$12: 3: 1$[/tex] ratio predicted by a certain genetic model? Use the chi-square test at alpha [tex]$=0.05$[/tex]. (a) Write [tex]$H _0$[/tex] and [tex]$H _1$[/tex]. (b) Calculate the "expected" frequency for each color. A. [tex]$H _0$[/tex]: Ratio among three colors [tex]$=12: 3: 1$[/tex] vs. [tex]$H _1$[/tex]: Ratio [tex]$\neq 12: 3: 1$[/tex] expected values [tex]$=146.75,31.4375,15.8125$[/tex] B. [tex]$H _0$[/tex]: Ratio among three colors [tex]$=12: 3: 1$[/tex] vs. [tex]$H _1$[/tex]: Ratio [tex]$\neq 12: 3: 1$[/tex] expected values [tex]$=155,40,10$[/tex] C. [tex]$H _0$[/tex]: Ratio among three colors [tex]$=12: 3: 1$[/tex] vs. [tex]$H _1$[/tex]: Ratio [tex]$\neq 12: 3: 1$[/tex] expected values [tex]$=0.75,0.1875,0.0625$[/tex] D. [tex]$H _0$[/tex]: Ratio among three colors [tex]$=12: 3: 1$[/tex] vs. [tex]$H _1$[/tex]: Ratio [tex]$\neq 12: 3: 1$[/tex] expected values [tex]$=153.75,38.4375,12.8125$[/tex]

[Terjawab] Maksud ayat adjective

[Terjawab] If the temperature of our oceans continues to rise, what possible long-term effect will this have on marine life? A. The geographic range of phytoplankton will decrease, thus increasing the base of the marine food chain. B. The distribution of marine life will increase due to the increase in temperature. C. The diversity of marine life will increase due to the increase in temperature. D. The available oxygen of ocean waters will decrease, thus reducing marine life diversity.

[Terjawab] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Terjawab] Which is not found on a membrane? A. receptor tyrosine kinase B. intracellular receptor C. ligand-gated ion channel D. G protein-coupled receptor

[Terjawab] The group "Protista" is a) a domain. b) paraphyletic. c) a genus. d) monophyletic.

[Terjawab] Select the best answer for the question. What's the role of a primary consumer in the food web? A. To eat secondary consumers and produce energy B. To break down organic matter in the soil C. To eat producers and store some of their energy D. To combine parts of the ecosystem into one nutrient

[Terjawab] What's the name for the process of ingesting food by engulfing a particle into a vacuole? A. Mixotrophism B. Schizogony C. Phagocytosis D. Axopodia