Fig. 6.1 is a photograph of a saguaro cactus, Carnegiea gigantea, which lives in a desert. The climate in a desert has very low rainfall and very high daytime temperatures. Describe two visible adaptive features shown in Fig. 6.1 and explain how each feature is beneficial for living in a desert. feature 1 explanation feature 2 explanation

Biology

IGCSE&ALevel

CAIE

Exam No：0610_w23_qp_43. Year：2023 Question No：6(b)

Answer:

18.2.1 Define adaptive feature as an inherited feature that helps an organism to survive and reproduce in its environment

18.2.2 Interpret images or other information about a species to describe its adaptive features

18.2.3 Interpret images or other information about a species to describe its adaptive features

18.2.4 Define adaptive feature as the inherited functional features of an organism that increase its fitness

18.2.5 Define fitness as the probability of an organism surviving and reproducing in the environment in which it is found

18.2.6 Explain the adaptive features of hydrophytes and xerophytes to their environments