Plants Responses to Stimuli - Forces and Motion

Which organelles, found in plant cells, help a plant maintain high turgor pressure and remain rigid?

• cell wall

• cell membrane

• vacuole

• mitochondria

• nucleus

A tissue is any distinct type of material found in an animal or plant that is made of specialized cells. Which of the following would be considered to be a tissue?

• heart

• stem

• skin

• flower

Plants are complex organisms that are composed of multiple layers of organization. Which of the following best represents the organization of the root system from most complex to least complex?

• root system → root → phloem → cell

• root system cell phloem → root

• root system - → root → cell - phloem

• root system phloem root → cell

Why is the most likely reason for the direction of the plant growth?

• The plant lost turgor pressure and changed its growth direction.

• The plant was laid on its side inside the package and geotropism caused the plant to change its growth direction.

• The plant found light through the sealed package and phototropism caused the plant to change its direction of growth.

• Plants normally grow in strange patterns until they reach a certain age.

Which of the following represents the correct order for the levels of organization of plants and animals?

• cell → organ tissue organism organ system

• cell organ system organ tissue → organism

• cell tissue- organism tissue → organ system

• cell → tissue - organ → organ system → organism

Scientists working in space would MOST LIKELY be studying the effects of which of the following on plant growth?

• friction

• gravity

• wind

• temperature

A bean plant grown on Earth and a bean plant grown aboard the International Space Station are MOST likely to differ in the -

• color of their leaves

• shape of their root systems

• nutrients they need to survive

• way they respond to direct light

The tip of a plant's root is covered by a root cap. The root cap produces a slimy, slippery substance. Which of the following is the MOST likely purpose for this substance?

• absorbing water and nutrients in soil

• reducing the plant's need for soil

• helping roots grow through the soil

• anchoring the plant to the soil

Which human body system performs a function similar to that of the vascular system of a plant?

• nervous system

• artery

• circulatory system

• kidney

If the top portion of plants grow 'up,' explain why a small tree on a hillside does not grow straight out from the hillside?

• The tree is growing toward water.

• The tree is resting on the hillside.

• The tree is leaning toward the top of the hill so rain won't wash it off.

• The tree's roots and trunk are growing in response to gravity.