Plants in Extreme Environments: Adaptations for Survival

The video discusses the essential resources plants need to survive, such as light, water, and carbon dioxide, and how these are used in photosynthesis. It explains the process of photosynthesis, the role of chlorophyll, and the importance of transpiration. The structure of leaves, including stomata and chloroplasts, is examined to understand their function in photosynthesis. The video also explores how plants adapt to extreme environments, focusing on rainforest and desert plants, highlighting their strategies to manage light and water availability. The presentation concludes with a summary of these adaptations.

What are the essential resources that plants need to perform photosynthesis?

• Water, oxygen, and nitrogen

• Light, water, and oxygen

• Carbon dioxide, nitrogen, and light

• Light, water, and carbon dioxide

How do plants primarily obtain mineral ions necessary for their growth?

• Through the leaves

• From the air

• Via the roots dissolved in water

• Through photosynthesis

What is the main purpose of the cuticle on a leaf?

• To absorb sunlight

• To reduce water loss

• To facilitate gas exchange

• To store nutrients

How do guard cells help in conserving water in plants?

• By storing water in the stem

• By increasing the surface area of leaves

• By closing stomata when photosynthesis is not occurring

• By opening stomata during the night

What adaptation helps rainforest plants to cope with low light levels?

• Spines instead of leaves

• Large leaves with a big surface area

• Thick cuticle

• Small leaves

Why do cacti have spines instead of leaves?

• To reduce water loss

• To increase photosynthesis

• To store more water

• To attract pollinators

How do cacti manage to photosynthesize despite having spines?

• They photosynthesize only at night

• They have chloroplasts in their stems

• They use their roots for photosynthesis

• They rely on other plants for photosynthesis