Biology Quiz 7

The conjunctiva of the eye gets inflamed and becomes pink when dust gets into it. It is the clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids. Conjunctivitis is often called pink eye. It happens when the conjunctiva is irritated by an infection or allergies or dust.

Both male and female mosquitoes eat the same things—Plant sap, nectar and plant derivatives—for energy. But only female mosquitoes imbibe a blood meal.

Bleaching powder is used in drinking water as a disinfectant. It is an active agent which is used to kill germs and bacteria in drinking water. The main content of the bleaching powder is the Chlorine element which acts as the main disinfectant material.

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.

Leukaemia is a cancer of the blood or bone marrow and is characterized by an abnormal proliferation of blood cells, usually white blood cells (leukocytes).

Atherosclerosis is a narrowing or blockage of artery walls usually caused by the buildup of fatty material called plaque. Coronary artery disease is a narrowing or blockage of coronary arteries. Hypertension, also known as low blood pressure, increases the risk of a heart attack. Hypotension (or low blood pressure) is a blood pressure under 90/60 mm/Hg.

Vitamin E is particularly important for the normal activity of sex glands as it improves blood flow and oxygen to sexual organs. It is an antioxidant that helps to maintain healthy skin, eyes and hormonal balance. It also enhances immune function and prevents clots from forming in heart arteries.

Sunlight is not required for seed germination. Light isn't strictly necessary for germination in most plant species. All seeds need water, oxygen and suitable temperature to germinate.

Excretory products of a mammalian embryo are eliminated out by Placenta. The placenta is a temporary organ that develops in the uterus during pregnancy. It provides the nutrients and oxygen to the baby for development and growth. Excretory products eliminated from the embryo such as urea, uric acid, and creatinine are transferred to the maternal blood by diffusion across the placenta.

The 'eye' of the potato can produce new plants by vegetative propagation.