Plant Stages Growth and Development

What is the role of auxin in plant growth and development?

• Prevents apical dominance and lateral root growth

• Causes leaf wilting and stunted growth

• Promotes cell elongation, root formation, and apical dominance

• Inhibits cell elongation and root formation

Name one synthetic plant hormone and its application in agriculture.

• Ethylene - used to reduce fruit ripening in agriculture

• Auxins - used to repel pests in agriculture

• Cytokinins - used to inhibit plant growth in crops

• Gibberellins - used to promote stem elongation and fruit growth in crops.

Explain the role of cytokinins in plant growth and development.

• Cytokinins have no role in delaying aging in plant tissues

• Cytokinins promote cell division and growth, delay aging in plant tissues, and help in the formation of new organs.

• Cytokinins inhibit cell division and growth in plants

• Cytokinins hinder the formation of new organs in plants

How do gibberellins affect seed germination and stem elongation?

• Gibberellins inhibit seed germination and stem elongation.

• Gibberellins have no effect on seed germination and stem elongation.

• Gibberellins cause seed germination but inhibit stem elongation.

• Gibberellins promote seed germination and stem elongation.

What are the functions of abscisic acid in plants?

• Enhancing photosynthesis

• Preventing water loss

• Regulating responses to environmental stresses

• Promoting growth and development

Tags

NGSS.HS-LS1-2

Describe the role of ethylene in fruit ripening and senescence.

• Causes fruit to become unripe and fresh

• Delays fruit ripening and senescence

• Promotes fruit ripening and senescence

• Has no effect on fruit ripening and senescence

Explain the concept of phototropism in plants.

• The growth of plants in response to gravity

• The growth of plants in response to sound

• The growth of plants in response to light

• The growth of plants in response to temperature

Tags

NGSS.MS-LS1-5

What is gravitropism and how does it affect plant growth?

• Gravitropism causes plants to grow towards light

• Gravitropism affects plant growth by influencing the direction of root and stem growth in response to gravity.

• Gravitropism has no effect on plant growth

• Gravitropism is a type of photosynthesis that occurs in plants

Describe the process of thigmotropism in plants.

• Plants respond to sound by growing in a particular direction.

• Plants respond to touch or contact with a solid object by growing in a particular direction.

• Plants respond to temperature by growing in a particular direction.

• Plants respond to light by growing in a particular direction.

How do plants exhibit hydrotropism in response to water availability?

• By growing their roots towards areas with higher water availability.

• By changing the color of their leaves in response to water availability.

• By reducing the length of their roots in response to water availability.

• By growing their roots towards areas with lower water availability.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1