NEET Practice Questions (MCQs) with Answers & Solutions

Adventitious roots develop from any part of the plant body except the radicle. These roots can arise from stems, leaves, or old roots and are often involved in vegetative propagation and support.

The arrangement of leaves on the stem is called phyllotaxy. This term refers to the pattern in which leaves are attached to the stem, which can be alternate, opposite, or whorled.

Phylloclade is a modified stem that takes on the function of photosynthesis. Unlike leaves, phylloclades are typically flattened and resemble leaves, allowing them to carry out photosynthesis efficiently. Common examples include cacti and certain species of Euphorbia.

Nodulated roots occur in the family Leguminosae (also known as Fabaceae). These roots form a symbiotic relationship with nitrogen-fixing bacteria called Rhizobia, which help in converting atmospheric nitrogen into a form that the plant can use, thereby enriching the soil with nitrogen.

Insectivorous plants, like the Venus flytrap and pitcher plants, catch insects primarily to obtain nitrogen. These plants often grow in nitrogen-deficient soils and have evolved to trap and digest insects to fulfill their nitrogen requirements, which is essential for their growth and development.

In Clematis, the petiole is modified into a tendril to help the plant climb and support itself. This modification allows the plant to attach to surrounding structures and grow efficiently.

Vegetative reproduction in Agave occurs through bulbils. These are small bulb-like structures that form in the axils of leaves or inflorescences. Bulbils can detach and grow into new individual plants, thus aiding in the plant's propagation.

The 'eye' of a potato is an axillary bud. These buds are located at the nodes, or 'eyes,' on the tuber and can sprout to form new shoots and eventually new potato plants. This is a common method of asexual reproduction in potatoes.

In raceme inflorescence, if the main axis branches and each branch bears flowers in a racemose manner, it is called a panicle. A panicle is essentially a branched raceme.