Explanation: Pelvic fins, located on the bottom of the fish in front of the anal fin, help balance the fish, keep it level, and prevent it from rolling from side to side. Pelvic and pectoral fins are usually paired, allowing a fish to fine-tune its movements.
Q593. What part of the eye gets inflamed and becomes pink when dust gets into?
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.
Enzyme-linked immunosorbent assay (ELISA). This test is usually the first one used to detect infection with HIV. If antibodies to HIV are present (positive), the test is usually repeated to confirm the diagnosis. If ELISA is negative, other tests are not usually needed.
A biopsy is a medical test commonly performed by a surgeon, interventional radiologist, or an interventional cardiologist involving extraction of sample cell or tissues for examination to determine the presence or extent of a disease.
Biopsies are most commonly performed for insight into possible cancerous and inflammatory conditions.
Q602. During dehydration what is the substance that is usually lost by the body?
Hypotonic saline fluids such as 0.45% sodium chloride solution, which expand the intracellular compartment, are indicated for hypertonic dehydration, gastric fluid loss, and cellular dehydration from excessive diuresis.
Q603. The animal which uses sounds as its ‘eyes’ is
Bats are the second largest order of mammals (after the rodents), representing about 20% of all classified mammal species worldwide. Bats are present throughout most of the world, with the exception of extremely cold regions.
Iron is the main component of hemoglobin, which carries oxygen through the body. During pregnancy, a woman’s blood supply increases to supply nutrition to the growing fetus. Iron deficiency may cause iron-deficiency anemia.
Although sodium need not be restricted during pregnancy, excessive use is not recommended. A diet of primarily natural foods can be safely salted “to taste.”
Q605. Which components of light are absorbed by chlorophyll?
Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light. Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum which it reflects, producing the green color of chlorophyll-containing tissues.
Ginger is a modified stem. Ginger root should not be given to rabbits under any circumstances, ginger is called an underground stem or a rhizome because it looks and acts like a root but it is different from a root because it usually grows horizontally.
Tubers are somewhat similar to bulbs. Tubers, such as potatoes, are enlarged, fleshy underground stems. While potatoes do not always reproduce by using tubers, if you’ve ever left a potato for too long, you know that new potato plants can develop from the tuber.
Q608. Taenia solium (Tape worm) lives as a parasite in
The pork tapeworm, Taenia solium, is the most harmful tapeworm in humans. Taenia solium infection is acquired either from human feces that contains Taenia solium eggs or from uncooked pork which contains larval cysts. If larvae are ingested, they mature into adults in the small intestine.
Q609. An ant can see the objects all around it due to the presence of
An ant’s head contains many sensory organs. Like most insects, ants have compound eyes made from numerous tiny lenses attached together. Ant eyes are good for acute movement detection, but do not offer a high resolution image. They also have three small ocelli (simple eyes) on the top of the head that detect light levels and polarization.
Q610. What is the approximate time required for a heart-beat?
Tortoises generally have one of the longest lifespans of any animal, and some individuals are known to have lived longer than 150 years. Because of this, they symbolize longevity in some cultures, such as China.
The novel technological development of the Green Revolution was the production of novel wheat cultivars. Agronomists bred cultivars of maize, wheat, and rice that are generally referred to as HYVs or “high-yielding varieties.”
Q614. Among the defects of eye, the short sightedness is called
Near-sightedness, also known as short-sightedness and myopia, is a condition of the eye where light focuses in front, instead of on the retina. This causes distant objects to be blurry while close objects appear
Q615. Human cloning is permitted in Britain for the purpose of
All vegetables benefit from proper post harvest care. A large proportion of vegetables and perishable foods are lost after harvest during the storage period. These losses may be as high as thirty to fifty percent in developing countries where adequate cold storage facilities are not available.
There may be signs of specific causes of anemia, e.g. koilonychia (in iron deficiency), jaundice (when anemia results from abnormal break down of red blood cells — in hemolytic anemia), bone deformities (found in thalassemia major) or leg ulcers (seen in sickle-cell disease).
Q620. For a healthy heart, one needs to take a balanced diet, adequate sleep and
An alga is an informal term for a large, diverse group of photosynthetic organisms, which are not necessarily closely related, and is thus polyphyletic. The largest and most complex marine algae are called seaweeds.
When cysts are swallowed they cause infections by excysting (releasing the trophozoite stage) in the digestive tract. Entamoeba histolytica, as its name suggests (histo–lytic = tissue destroying), is pathogenic;
infection can be asymptomatic or can lead to amoebic dysentery or amoebic liver abscess.
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes.
The DNA molecule is shaped like a twisted ladder. James Watson and Francis Crick solved the structure of DNA. Other scientists, like Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
Electrode leads on the chest wall are able to detect electrical impulses that are generated by the heart. Normally, the heart beats in a sinus rhythm with each electrical impulse generated by the SA node resulting in a ventricular contraction, or heartbeat.
Q625. Which of the following is incorrect?
(a) AIDS is retroviral disease
(b) AIDS is transmitted by homo and hetero-sexual contact
Necrosis is caused by factors external to the cell or tissue, such as infection, toxins, or trauma which result in the unregulated digestion of cell components. In contrast, apoptosis is a naturally occurring programmed and targeted cause of cellular death.
Q628. Insufficient blood supply in human body is referred as
Ischemia is a restriction in blood supply to tissues, causing a shortage of oxygen and glucose needed for cellular metabolism (to keep tissue alive). Term Ischemia is used when an inadequate blood supply to an organ or part of the body, especially the heart muscles is detected.
Q629. Deep fried food materials are carcinogenic because they are rich in
The condition is inherited in an autosomal recessive pattern. Wilson’s disease is the most common from a group of hereditary diseases that cause copper overload in the liver. All can cause cirrhosis at a young age.