Olympiad Test: Getting to Know About Plants - Class 6 MCQ

Brinjal is a rather small plant that grows up to 1.5m. Brinjal is classified as a herb because of its non-woody stem. Its simple leaves are oblong to oval, slightly lobed, with its underside a paler green than the upper surface.

In botany, a tendril is a specialized stem, leaves or petiole with a threadlike shape that is used by climbing plants for support, attachment and cellular invasion by parasitic plants, generally by twining around suitable hosts found by touch.

Also called the leaf stalk, the petiole is actually an extension of the leaf in certain plants. It is the structure that connects the leaf to the stem or trunk of most vascular plants. Far from being a simple attachment mechanism, the petiole is a key player in plant function.

In the chart P is hinge joint and Q is ball and socket joint.

The skeletal system's main function in relation to the muscular system is to provide attachment points for muscles. It does not directly assist muscles in growth and development.
so correct answer is A.

Fins help the fish to move in water. The forward movement of the fish starts with front and sideways push of the tail. The flexible and strong tail fin of the fish pushes the water and propels the fish forward.

The label X is a muscle while label T is a joint. Muscles move the joints by contraction and relaxation. On contraction, muscles get shorter and on relaxation, they get longer.

Cockroach can walk, climb and can also fly in air. The muscles in the breast region move the legs for walking while another set of breast muscles move the wings during flying.

Ball and socket joint allows the maximum movement in all the directions. Hinge joint provides back and forth movement in one plane similar to door hinges. Pivot joint allows one bone to rotate over the other. The only movable bone in skull is the lower jaw bone. Birds have hollow bones that make them light weight and help to fly. Snakes have flexible backbones.

The given figure is showing tap root system. Tap root is the main root and many lateral roots arise from it. Pea, radish, carrot and turnip are examples of plants that have tap root system.