Plant Systems & Homeostasis

Front

What is turgor pressure and what happens without it?

Back

pressure exerted by water inside the cell pushing against the cell wall

Front

Leaves and stems growing towards the sunlight exhibits what kind of tropism?

Back

phototropism

Front

The roots of a plant growing downwards exhibits what kind of tropism?

Back

Positive geotropism

Front

How is the turgor pressure force exerted on the inside of a seed to split it open so it can emerge into a seedling?

Back

Water within the seed pushes out against the seed coat

Front

In a germinating seed, the downward growth of roots and the upward growth of leaves and stems are the plant's response to what?

Back

gravity

Front

What is the internal stimulus that would cause a plant to wilt?

Back

A lack of water in the stem

Front

What internal and external conditions would most likely cause the stomata in a plant to be open?

Back

There is plenty of water in the plant, and it is daytime.

Front

Scientists working in space would most likely be studying the effects of what kind of stimuli on plant growth? Options: temperature, radiation, oxygen, gravity

Back

gravity

Front

What stimulus causes the roots and stems to grow in opposite directions? Options: Water, Temperature, Gravity, Light

Back

Gravity

Front

What stimulus is most likely to cause the stomata to close?

Back

Water volume decreasing in the soil