bio2 wuiz questions

Which of the following about water flow across a semi-permeable membrane is true?

• A semi-permeable membrane does not allow water to flow across the membrane

• Net water flow will be from the hypertonic to the hypotonic solution
  

• Net water flow will be from the hypotonic to the hypertonic solution
  

• Water will stop moving across the membrane when equilibrium is reached

Net water flow will be from the hypotonic to the hypertonic solution

Phloem transports ______ from the ______ source to the _______ sink.

amino acids; roots; mycorrhizae

proteins; roots; leaf

sugars; flowers; leaf

sugars; leaf; roots

sugars; leaf; roots

What is the main force by which most of the water within xylem vessels moves toward the top of a tall tree?

the ability of water molecules to adhere to each other.

The active transport of solutes into the roots

transpiration of water through stomata

The force of root pressure

transpiration of water through stomata

Plants get most of the oxygen that they assimilate into macromolecules from carbon dioxide. T/F

True

Photosynthesis begins to decline when leaves wilt because

chloroplasts within wilted leaves are incapable of capturing light energy.

COz accumulates in the leaves and inhibits the enzymes needed for photosynthesis.

stomata close, restricting COz entry into the leaf.

O2 is not available for photosynthesis.

stomata close, restricting COz entry into the leaf.

All of the following function in signal transduction in plants except

random mutations

phytochrome

plant hormones

calcium ions

random mutations

The instructions on a seed packet recommended a shallow planting depth of ¼ inch for the enclosed seeds. The most likely reason for the ¼ inch planting depth is that

the seedlings of this variety lack an etiolation response

this prevents birds from removing the seeds

this seed variety requires higher temperature to germinate

this seed variety is very sensitive to waterlogging

this seed variety requires light for germination

this seed variety requires light for germination

stem of a plant placed near a window through which sunlight penetrates into a room grows towards the window. This process, which is referred as involves

light and the hormone

graviotropism; red; auxin

phototropism; blue; auxin

phototropism; blue; gibberellin

graviotropism: blue; gibberellin

phototropism; red; auxin

phototropism; blue; auxin

Abscisic acid is a plant hormone that promotes seed germination, while gibberellin is a plant hormone that inhibits seed germination.

True

False

False

flash of red light followed by a flash of far-red light given during the middle of the night to a short-day plant will likely.

have no effect upon flowering

stimulate flowering

inhibit flowering

cause flowers to get bigger

stimulate flowering

The _______ represent terrestrial biomes in which competition for light is intense.

tropical forests

Savannas

Tundras

temperate plains

chaparrals

tropical forests

Which of the following levels of organization is arranged in the correct sequence from most to least inclusive?

individual, population, community, ecosystem

ecosystem, community, population, individual

population, ecosystem, individual, community community, ecosystem, individual, population individual, community, population, ecosystem

ecosystem, community, population, individual

population is correctly defined as having which of the following characteristics?

(1 inhabiting the same general area

1. individuals belonging to the same species

2. possessing a constant and uniform density and dispersion

1 and 2, only

1 only

2 and 3 onlv

1 and 2 only

Natural selection does not influence life history traits of a species.

true

False

False

Carrying capacity is

the maximum population size of a species that a particular environment can support

the term used to describe the stress a population undergoes due to limited resources

determined by the dispersion pattern of the species.

seldom reached by marine producers and consumers because of the vast resources of the ocean

the maximum population size of a species that a particular environment can support

In an environment where a species 'A' competes for resources with another species 'B', the 'Realized Niche' for species 'A' is larger than its' Fundamental Niche.

True

• False

False

insect with a primary feeding behavior that involves chewing on the mature fruits on a peach tree is an example of

predation

parasitism

mutualism

herbivory

Herbivory

The species richness of a community refers to

the total numbers of all organisms in that community.

the relative numbers of individuals of that species in that community

the trophic structure of the food web in that community

the number of different species in that community

the number of different species in that community

Which of the following statements is consistent with the principle of competitive exclusion?

Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.

Bird species generally do not compete for nesting sites.

Evolution tends to increase competition between related species.

The density of one competing species will have a positive impact on the population growth of the other competing species.

Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.

Which of the following will be at the lowest trophic level in an aquatic food chain?

small fish

shark

phytoplanktons

zooplankton

Phytoplanktons

In a lake, 15 species of invertebrates were reduced to eight after one species was removed. The species removed was likely a(n) _

Keystone Species

Invasive species

Foundation Species

Dominant Species

Keystone Species

Which one of the following statements is INCORRECT?

• Matter (nutrients) cycle through any given ecosystem

• Net primary production in a given ecosystem is the amount of light energy converted to chemical energy by photosynthetic organisms in that ecosystem

• Energy flows through an Ecosystem

• In ecosystems, some energy is lost as heat when the energy undergoes transformation from one form into another

Net primary production in a given ecosystem is the amount of light energy converted to chemical energy by photosynthetic organisms in that ecosystem

If the Sun were to suddenly stop providing energy to Earth, most ecosystems would eventually vanish. Organisms in which trophic level would likely survive the longest after this hypothetical disaster?

Primary producers

Secondary consumers

Tertiary consumers

Primary consumers

Tertiary consumers

Ecological Footprint is the average area of earth needed to sustain an individual in any nation.

True

False

True

Bioremediation' and 'Biological augmentation are two of the several approaches utilized for restoration of damaged ecosystems.

True

False

True