BIO Questions 31-40 Exam 4

31. Which of the following properties of water is most important for the operation of the cohesion-tensionmodel?

• a. Water cannot be created nor destroyed, it can only be converted from one form (i.e. gas,liquid or solid) to another.

• b. Water is able to dissolve all of the solutes that must be transported by plants.

• c. Water is an incompressible liquid that can be forced through tiny holes.

• d. Water is able to hydrogen bond with itself and the cell walls of plants.

• e. Water spontaneously moves acros membranes from a region of low solute concentration toa region of high solute concentration.

32. The rapid decline in the reindeer population on St. Paul Island (Alaska) is attributed to . . .

• a. over-hunting by the indigenous people after the ban on hunting was lifted.

• b. a marked increase in the number of predators migrating to the island.

• c. the Exxon/Valdez oil spill that contaminated shoreline food supplies

• d. several consecutive yeas of heavy snowfall that buried forage beneath deep snow.

• e. the exhaustion of the available reindeer food supply due to overgrazing.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

33. Oak forest populations will rarely, if ever, have oak seedlings in their understory mainly because . . .

• a. oak seedlings do not grow well in the shade of more mature plants.

• b. oak trees only start to produce acorns during the second half of their life spans.

• c. acorns need fire to break their dormancy and germinate.

• d. acorns require bare mineral soil in order to get established.

• e. squirrel populations generally consume a large portion of the acorns produced each year.

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NGSS.MS-LS2-4

34. Secondary succession would be expected to occur in all of the following potential habitats except . . .

• a. a mountainside stripped of its forest by logging.

• b. a prairie recently burned by wildfire.

• c. a shoreline of aquatic plants following an extended period of drought.

• d. an outcrop of recently fallen rocks after a landslide.

• e. a pasture left abandoned without domesticated grazing animals.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

36. Which of the following comparisons between xylem vs. phloem cells/tissues is false?

• a. Transport cells in both xylem and phloem transport are dead at maturity.

• b. Xylem transports mainly water & minerals while phloem transports mainly sugars, aminoacids & minerals.

• c. The direction of transport in xylem is mainly upwards while the direction of phloemtransport can be upwards or downwards.

• d. Xylem represents the woody parts of trees while phloem represents the bark of trees.

• e. Transport cells in xylem are mainly sclerenchyma cells while transport cells in phloem aremainly parenchyma cells.

37. In comparison to all the other plant hormones, ethylene is unique because it is the only hormone that is a . . .

• a. lipid

• b. protein.

• c. gas.

• d. pigment.

• e. oil

39. Phytochrome promotes (or is involved in) all of the following except . . .

• a. leaf expansion.

• b. fruit ripening.

• c. seed germination.

• d. photomorphogenesis.

• e. chlorophyll biosynthesis.

40. Which of the following organelles act as the statolith within the plant cell during gravitropism?

• a. amyloplast

• b. nucleus

• c. endoplasmic reticulum

• d. vacuole

• e. golgi body