Biology Quiz 4

Monocot and dicot plants have different pollen structures. In a monocot, the pollen grain produced by the flower has a single furrow or pore through the outer layer. In a dicot plant, the pollen grain has three furrows or pores.

Edible part of cabbage is a vegetative bud. Vegetative buds are those from which stem leaves are grown.

Foramen Magnum (also called great hole) is an aperture found in the skull. It is a large, oval-shaped opening in the occipital bone of the skull.

A lymphocyte is a type of white blood cell that is part of the immune system. Lymphocytes include natural killer cells, T cells, and B cells. The job of B cells is to make antibodies, which are proteins produced by the immune system to fight foreign substances known as antigens.

Cyanide poisoning causes death in seconds because it breaks the electron transport chain. Cyanide blocks the cellular electron transport mechanism and cellular respiration by inhibiting the mitochondrial ferricytochrome oxidase system and other enzymes.

Ketone bodies are chemicals that the body makes when there is not enough insulin in the blood and it must break down fat instead of the sugar glucose for energy. Testing for ketones in urine is important in people with diabetes.

The adult human brain weighs on average about 1200–1400 gm which is about 2% of the total body weight.

Araneology is the study of spiders. It is the scientific study of arachnids, which comprise spiders and related animals such as scorpions, pseudoscorpions, and harvestmen. The raising of bees is known as apiculture. The study of aphids is known as aphidology. Acarology is the study of mites and ticks.

Cloves are commonly used as a spice. They are the dried flowers of the tree Syzygium aromaticum.

Acetabularia is the biggest single-celled organism. It is genus of single-celled green algae (family Polyphysaceae) found in subtropical seas. The algae are among the largest single-celled organisms and also feature an unusually large nucleus.