Botany MCQs for NEET — Practice Questions with Answers

Both statements are true, but the reason does not directly explain the statement. Leaves do prepare food through photosynthesis (S), and they also facilitate gas exchange for respiration (R). However, gas exchange is not the reason why leaves perform photosynthesis.

Loranthus is a parasitic plant and does not possess root nodules. Rhizobium bacteria live in the root nodules of leguminous plants, not in Loranthus. Therefore, the statement (S) is false and the reason (R) is true.

In a caryopsis, the pericarp and seed coat are indeed fused to form a 'hull'. However, Tridax and Vernonia are not examples of caryopsis; instead, they are examples of achenes. Therefore, the statement (S) is true, but the reason (R) is false.

The actual natality (birth rate) in snakes is often less than the potential natality due to multiple factors. Not all eggs are incubated successfully, environmental resistance (like predation and disease), and even if eggs are incubated, many offspring do not survive to adulthood. Hence, all these factors contribute to a lower realized natality.

In a habitat with limited resources, a population typically exhibits logistic growth. This is characterized by an initial lag phase, followed by a phase of acceleration (exponential growth), then deceleration as the population reaches the carrying capacity of the environment, and finally stabilizes at an asymptote. This results in an S-shaped or sigmoid curve, not a J-shaped curve.

Thermoacidophils are a type of archaebacteria that thrive in extremely hot and acidic environments, such as hot water springs with temperatures exceeding 100°C. They are able to survive in these harsh conditions due to their unique adaptations.

The flowers in Ravenala, also known as the traveler’s tree, are pollinated by lemurs. These primates are attracted to the nectar and aid in the pollination process by transferring pollen as they move from flower to flower.