B10B

Structures represented in the illustrations below are found in the lower epidermis of a plant leaf. The illustration at right shows the response to a certain environmental condition. The response represented in the illustration would most likely be cause by -

• a reduced supply of oxygen

• long periods of rainfall

• high concentration of glucose

• little available water

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

The internal transport of water and minerals in plants requires that two systems work together. Which diagram correctly describes how the two systems accomplish this?

• F

• G

• G

• J

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?

• 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 grown 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

Tags

NGSS.MS-LS3-2

Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Which system carries cytokinins produced in the roots to the rest of the plant?

• vascular tissue

• dermal system

• reproductive system

• none of the above

Tags

NGSS.MS-LS2-3

Several structures work together to allow flowering plants to reproduce. The diagram shows a typical flower. Which table correctly identifies the function of each structure or group of structures in the reproduction of the plant?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-4

Plants called sundews have rounded green leaves with many hair like structures. The ends of these structures contain enzymes in a sticky liquid that looks like nectar or moisture, as shown in the picture. The hairs do not react to dust or nonliving material but will bend inward when insects get caught in the sticky liquid. Sundews digest trapped insects over a period of a few days. Based on this information, what functions do the specialized leaves of the sundews perform?

• provide water to the plant and perform photosynthesis

• respond to stimuli and anchor the plant

• provide nutrients to the plant and respond to stimuli

• release pollen to insects and perform photosynthesis

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Invasive plant species affect the interactions of living and nonliving components of an ecosystem, so the removal of invasive plants is often necessary. The goal of most plant control methods is to disrupt or inhibit the function of different plant systems. For example, insects can be used to chew through roots in order to reduce a plant's ability to absorb water. Which of these functions would be most immediately affected by a reduction in water uptake by roots?

• disease resistance

• seed dispersal

• sunlight absorption

• photosynthesis

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student reads this advertisement for a product containing a plant micronutrient that can be added to soil. Based on this information, the student can conclude that boron is absorbed by plant roots from soil and then -

• transported to reproductive tissues by the plants shoot system

• stored in plant stems until the flowers are pollinated

• concentrated in the roots until the plants reproductive tissues mature

• transported by the phloem to the stomata in leaves, where it attracts pollinators

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the experimental group was light conditions. The control group was provided full light, while the experimental group was shaded on one side. The diagrams shows the average heights and positions of blades of grass in the investigation. Which statement best explains why the grass tips of the experimental group bent toward the light?

• water evaporated faster on the side of the plant having full light

• light sensors in the grass tips stimulated a hormone in the shoot system

• the xylem in the root system absorbed more nutrients from the shaded side

• the side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere

Plant roots have extensions called root hairs. These root hairs are important in the homeostasis of the plant. Which statement best explains the importance of the root hairs to the stems and leaves of the plant?

• root hairs convert minerals into glucose for immediate use by cells

• root hairs decrease the need for osmosis and diffusion in vascular tissue

• root hairs prevent water loss in leaves through transpiration and gas exchange

• root hairs increase the surface area of the roots for nutrient and water absorption

Tags

NGSS.MS-LS2-1