Unit 12: Plants

Why do some plants, like cacti, keep their stomata closed during the day?

• limits water loss through transpiration

• conserves oxygen produced in photosynthesis

• recycles carbon dioxide within plant systems

• protects plant tissues from predators

Tags

NGSS.MS-LS2-1

Which of the following are adaptations seen in DESERT plants?

• thicker cuticle on their leaves

• deep, extensive root systems

• broad leaves

• stomata open at night

Tags

NGSS.MS-LS4-4

Plants in the rainforest have ​ (a)   (b)   because in the rainforest, plants will not dry out due to large amounts of rain.

• thinner
• cuticles
• mesophyll
• thicker

Tags

NGSS.MS-LS2-1

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. This response enabled by auxin is known as ______

• geotropism

• transpiration

• phototropism

• photosynthesis

Nutrients, like copper, found in the soil are important for reproductive growth in plants. Which statement correctly describes the interaction that occurs between the root and shoot systems of plants to allow reproduction to occur?

• copper is produced in the roots when copper-containing compounds are hydrolyzed

• copper that is absorbed by the roots is transported to reproductive tissues by the shoot system

• the shoot system stores copper for later use by the roots and the reproductive structures

• the shoot system transports copper to the roots after it is taken in through the stomata in the leaves

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following describes a way plants can reduce their transpiration rates?

• producing more stomata on the bottom of the leaf than the top

• decreasing the amount of carbohydrates sent through the phloem

• opening their stomata

• decreasing the thickness of their cuticle

Liana plants are woody vines that grow on trees in rainforests. These climbing plants are most likely adapted for

• preventing predators from eating beneficial insects

• growing through layers of foliage to reach available sunlight

• absorbing some of the nutrients found in the soil

• preventing trees from obtaining nutrients

Tags

NGSS.MS-LS2-3

Which system carries hormones like cytokinins produced in the roots to the rest of the plant?

• vascular system

• dermal system

• reproductive system

Xylem transports ​ (a)   and ​ (b)  

Phloem transports ​ (c)  

• water
• minerals
• glucose (sugar)

Tags

NGSS.MS-LS1-7

Xylem transports water & minerals ​from ​ (a)  

Phloem transports sugar (glucose) from ​ (b)  

• roots to shoots
• source to sink