Biology-part 5

Which statement is not true?

• The Casparian strips prevent water from moving between endodermal cells

• Water can move freely in the apoplast without entering cells

• the symplast consists of the interconnected cytoplasm of living cells

• water can enter the stele (xylem) without entering the symplast

stomata

• release less water to the environment than do other parts of the epidermis.

• control the opening of guard cells

• close when water is being lost at too great a rate

• do not respond to light

Osmosis

• continues until the pressure potential equals the water potential

• requires ATP

• can cause a cell to become turgid.

• results in the bursting of plant cells placed in pure water

A phytomer consists of the

• terminal bud, axillary bud and node

• stem, petiole and terminal bud

• internode, node and axillary bud

• node, internode and petiole

Which of the following would be considered an abiotic factor in the environment?

• Parasites

• Predators

• Herbivores

• wind

In flowering plants, the process of ____ is integrated into the formation of spores (sporogenesis) that develop into the male or female gametophyte, whereas the production of gametes (gametogenesis) is associated with the nuclear division known as ____.

• mitosis; mitosis

• meiosis; meiosis

• mitosis; meiosis

• meiosis; mitosis

This is the oval shaped part of a flower that contains pollen and is usually on the filament.

• anther

• Stigma

• Sepal

• stamen

Increased run-off from farms, urbanization and overflow of untreated sewage can lead to

• hypoxia; eutrophication

• blue tides; eutrophication

• algal blooms; global warming

• climate change; forest fires caused by

Temperature is perhaps the most important factor in the distribution of organisms because

• many organisms are able to grow faster in warmer climates

• most organisms are unable to regulate their body temperature precisely

• water is scarcer in warmer environments

• the metabolic optimum for endothermic animals is in temperate areas

Which of the following is an example of an interaction between field mice and an abiotic part of the ecosystem?

• Field mice breathe oxygen from the air

• A snake eats field mice

• Ticks suck blood from field mice.

• Field mice mate with each other