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Biology Test 45
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    1 and 4

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    Which of the following diseases of milching animals are infections ? 1. Foot and Mouth disease   2. Anthrax       3.  Black Quarter    4. Cowpox Select the correct answer using the codes given below:
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    osteoclasts

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    Low levels of calcium and phosphate ions in the blood would stimulate the activity of ________.
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    A = r, B = s, C = p, D = q

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    Match the compounds given in column-I with the number of carbon atoms present in them which are listed under column-II. Choose the answer which gives the correct combination of alphabets of the two columns. Column - I                                 Column - II A. Oxaloacetate                        p. 6 - C compound B. Phosphoglyceraldehyde       q. 5 - C compound C. lsocitrate                               r. 4 - C compound D. a-Ketoglutarate                     s. 3 - C compound t. 2 - C compoun
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    Psammophytes

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    Plants growing on sand are called as ?
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    Death rates are highest in newborns and in the elderly, whereas birth rates are highest in 20-year-olds.

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    Which of the following statements about human birth and death rates in populations is correct?
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    Calcium and phosphorus

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    Bones are mainly made up of?
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    Non-sister chromatids

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    The chromatids of two different chromosomes are called?
  • Question 8/30
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    osteons

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    Cylindrical structures in compact bone containing osteocytes arranged around a central canal are known as ________.
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    Melanin

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    Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called?
  • Question 10/30
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    25-55 years

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    Huntington’s chorea appears at the age of :
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    oxyntic cells

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    HCI is secreted by?
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    plants, animals and fungi

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    True multicellularity occurs only in.
  • Question 13/30
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    Polyunsaturated fatty acids

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    Consumption of fish is considered to be  healthy when compared to flesh of other animals because fish contains
  • Question 14/30
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    Alveodli

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    The exchange of gases in mammals takes place in the ?
  • Question 15/30
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    Sodium or potassium salts of heavier fatty acids

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    What are soaps?
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    Riccia

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    Gametophyte is the dominant phase in the lifecycle of ________.
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    3 only

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    Consider the following statements: 1. Dengue is protozoan disease transmitted by mosquitoes. 2. Retro-orbital pain is not a symptom of Dengue. 3. Skin rash and bleeding from nose and gums are some of the symptoms of the  Dengue. Which of the statements given above is/are correct ?
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    Nitrogen

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    The most abundant constituent of atmospheric air is..
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    reduce transpiration

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    In dry regions, the leaf size of a tree becomes smaller. It is so to.
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    Polio and Bird Flu

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    Diseases of which of the following pairs are caused by virus ?
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    life table.

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    A table listing such items as age, observed number of organisms alive each year, and life expectancy is known as a..
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    A-(3),B-(4),C-(2),D-(1)

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    Match List-I with List-II and select the correct answer using the codes given below the lists : List-I                                                    List-II (Achievement in genetics )                          (Scientists ) A. Discovery of transduction and                1. Khurana conjugation in bacteria B. Establishing the sex-linked                    2. Romberg inheritance C. Isolation of DNA polymerase from           3. Lederberg E.Coli D. Establishing the complete genetic           4. Morgan code                                                5. Ochoa
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    An antigen-antibody reaction

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    Which of the following is fundamentally the Rh factor ?
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    Haemophilla

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    An example of X-linked inheritance in humans is ?
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    Secondary oocyte

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    In Hen the egg is fertilized at the stage of..
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    anitgens

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    When an organ is transplanted from one person to another, there is a possibility that it could be rejected. This is because the cells of the individual receiving the organ react against foreign:
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    the chemical

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    A scientist testing the affects of a chemical on apple yeild sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each forest is counted. Which of the following is the independent variable in the experiment?
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    Leaf rust

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    Coffee cultivation in Sri Lanka was abandoned because of the disease
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    mass of fungal spores

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    The common edible mushroom is a
  • Question 30/30
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    An ovum

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    Which of the following human cells contains 23 chromosomes?
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