Plant Systems Assignment

Just like vertebrate animals, plants possess excretory systems. One way that plants excrete waste products is by opening pores in the surfaces of their leaves. These pores, called stomata, help a plant maintain homeostasis by allowing the plant to —

• collect substances such as ammonia and salt.

• release substances such as oxygen and water.

• manufacture substances such as chlorophyll and resin.

• destroy substances such as sap and uric acid.

Tags

NGSS.MS-LS2-3

Students set up a controlled experiment by growing the same type of seedlings in two different locations. After a period of time, the students observed the seedlings and recorded their observations in the table shown.

What caused the shoots of the seedlings on the windowsill to bend toward the window?

• Hormones produced in response to a light stimulus

• Sugars produced in response to a gravity stimulus

• Carbon dioxide produced in response to a water stimulus

• Water produced in response to a nitrogen stimulus

Tags

NGSS.MS-LS1-5

The underside of a leaf contains tiny pores called stomata. These pores lie next to specialized guard cells. Which of the following is NOT helped by the structure of the stomata and the specialized guard cells?

• The plants release of water during transpiration.

• The plants capture of pollen for sexual reproduction.

• The plants absorption of carbon dioxide for photosynthesis.

• The plants flow of nutrients from the roots to the rest of the plant.

Tags

NGSS.MS-LS1-6

The diagram shows the reproductive system of a plant.

Which of the following best describes the interaction that occurs between a plant’s reproductive parts during self-fertilization?

A.

• Pollen is released from the anther and is transferred to the stigma. A pollen tube forms and grows through the style. The pollen tube reaches the filament, where the sperm fertilizes the egg.

• Pollen moves from the ovule up through the style and is released from the stigma. The pollen is transferred to the anther, where the sperm fertilizes the egg.

• Pollen is released from the anther and is transferred to the stigma. A pollen tube forms and grows through the style. The pollen tube reaches an ovule within the ovary, where the sperm fertilizes the egg.

• Pollen is released from the stigma and is transferred to the anther. A pollen tube grows down from the anther through the filament and fuses with the ovule, where the sperm fertilizes the egg.

Plant hormones serve as chemical messengers between cells and tissues. Auxin is a plant hormone that causes the cells on the shady side of a plant shoot to elongate.The response enabled by auxin is known as —

• geotropism

• transpiration

• phototropism

• photosynthesis

How do plant structures work together to maintain a balance of water inside the plant?

• Shoots control water absorption, and roots control water evaporation.

• Roots control water absorption, and leaves control water evaporation.

• Leaves control water absorption, and roots control water evaporation.

• Roots control water absorption, and shoots control water evaporation.

Tags

NGSS.MS-LS2-1

A flower that has both male and female reproductive structures is shown. Which statement best describes an interaction that will allow a flowering plant to reproduce by self-pollination?

• An anther is transferred from a filament to another filament within the same flower.

• An ovule is transferred from the ovary to a petal on a different flower

• A pollen grain is transferred from an anther to the stigma of the same flower.

• An ovary is transferred from a flower on one plant to a flower on a different plant. 

Tags

NGSS.MS-LS1-4

The structures of the dermal and vascular systems work together to transport and provide materials essential for photosynthesis.  Which statement correctly identifies how they work together?

• The xylem transports glucose to the roots for storage, and the phloem allows oxygen to enter the leaf.

• The xylem transports water from the roots, and the stomata allows carbon dioxide to enter the leaf.

• The phloem transports water for transpiration, and the stomata allows oxygen to enter the leaf.

• The stomata transports glucose from the roots, and the phloem allows carbon dioxide to enter the leaf.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A climbing vine is able to coil around an object it touches. This occurs because the hormone auxin causes the cells on the side of the vine not touching the object to grow faster than the cells on the side of the vine touching the object.

The response that causes the vine to climb is known as ― 

• gravitropism

• hydrotropism

• phototropism

• thigmotropism

A student conducted an experiment investigating responses in plants. First, she placed a plant upright and noticed that the stems grew upward. Then, she turned the plant on its side and found that the stems bent so that they still grew upward.This response is known as ― 

• gravitropism

• hydrotropism

• phototropism

• thigmotropism