Understanding Plant Hormones and Growth

What are plant hormones?

• Artificial chemicals used to enhance plant growth

• Naturally occurring plant chemicals that allow plant cells to communicate in response to the environment

• Nutrients absorbed from the soil

• Proteins that provide structural support to plants

Which of the following is NOT a process impacted by plant hormones?

• Flowering

• Photosynthesis

• Root growth

• Aging

How do plant hormones travel within the plant?

• Through the air

• Via the plant's vascular system

• By diffusion through the soil

• Through direct contact with sunlight

Which environmental factors interact with plant hormones to trigger plant responses?

• Temperature, light, day length, and gravity

• Soil pH, humidity, and wind

• Rainfall, soil type, and altitude

• Carbon dioxide levels and oxygen levels

Tags

NGSS.MS-LS1-5

What is the role of auxins in plant growth?

• They inhibit root growth

• They promote shoot and root cell elongation for growth

• They prevent flowering

• They enhance fruit color

Tags

NGSS.MS-LS1-5

Which plant hormone is known as the "master plant growth regulator"?

• Gibberellins

• Cytokinins

• Auxins

• Ethylene

What is the effect of auxin rooting hormones when applied to cut stems?

• They prevent root growth

• They encourage root growth

• They enhance leaf color

• They inhibit stem elongation

Tags

NGSS.MS-LS1-5

Which process is NOT directly facilitated by plant hormones?

• Prevention of leaf fall

• Stem elongation

• Photosynthesis

• Color enhancement of fruit

What is the primary function of plant hormones in relation to plant cells?

• To provide energy for cellular respiration

• To direct cells for growth and development

• To store nutrients for later use

• To protect cells from pathogens

Tags

NGSS.MS-LS1-5

Which of the following is a major plant hormone?

• Chlorophyll

• Auxins

• Glucose

• Starch