24. Identify the biome represented in the photograph. Describe two ways that this vegetation has adapted to the climate. (3 marks)

Response:

Biome

- desert

Adaptations (have two of the following:)

Cacti have:

- thick waxy epidermis to limit/prevent evapotranspiration

- fleshy leaves for water storage

- thorns to protect leaves from animals which would expose flesh to dehydration by dry climate

Bushes have:

- subsurface root systems to collect atmospheric moisture

- thick, woody stems to protect against damage by animals which expose it to dehydration

- thorny leaf stems to prevent leaf loss by animals

- small leaves to limit evapotranspiration

- tap roots—plants develop deep root systems for ground water

- stunted growth due to lack of moisture

- seeds lie dormant for long periods of time

- plants are spread out for optimum use of moisture