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The taxonomic unit ‘Phylum’ in the classification of animal is equivalent to which hierarchical level in classification of plants:
Classification of taxonomical unit:
All living organisms are linked to one another because:
All living organisms share common genetic material, i.e., DNA but with variations.
Example: Bacteria have single-stranded circular DNA while in highly evolved eukaryotic cells of plants and animals, DNA is a long double-stranded helix.
Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
Members of Phycomycetes are found in:
(i) Aquatic habitats
(ii) On decaying wood
(iii) Moist and damp places
(iv) As obligate parasites on plants
Choose from the following options.
A dicotyledonous plant bears flowers but never produces fruits and Seeds. The most probable cause for the above situation is:
Types of flower:
The outermost and innermost wall layers of microsporangium in an anther are respectively:
A typical microsporangium is generally surrounded by four-wall layers, i.e., the epidermis, (outermost protective layer), endothecia, (middle fibrous layers), and the tapetum (innermost nutritive layer).
Microsporangium of Anther:
Starting from the innermost part, the correct sequence of parts in an ovule is:
The correct sequence of parts in an ovule is (innermost to outermost):
Egg - Embryo sac - Nucellus - Integument
Autogamy can occur in a chasmogamous flower if:
A particular species of plant produces light, non sticky pollen in large numbers and its stigma are long and feathery. These modifications facilitate pollination by
From among the situations given below, choose the one that Prevents autogamy and geitonogamy
Dioecious plant bearing only male or female flowers prevents both autogamy and geitonogamy.
All genes located on the same chromosome:
The Formation of Recombinant Chromosomes via Crossing Over:
Mycorrhiza does not help the host plant in:
Mycorrhiza helps the host plant in:
So, the correct option is 'increasing its resistance to insects'
Person having genotype IA IB would show the blood group as AB. This is because of:
Both genes are equally expressed hence its co-dominance.
A cross between two tall Plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
Tt and Tt let's use Mendel's cross of tall and dwarf pea plants as an example. The F1 plants of genotype Tt are self-pollinated. (both tall (T) but with dwarf (t) alleles).
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that:
Mendel’s law of independent assortment always holds good for genes situated on the:
Relationship between Chromosomes and chromatids:
Occasionally, a single gene may express more than one effect. The phenomenon is called:
In the F2 generation of a Mendelian dihybrid cross, the number of Phenotypes and genotypes are:
In the F2 generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are 4, 9 respectively.
In a DNA Strand, the nucleotides are linked together by:
Two nucleotides are linked through 3 → 5 phosphodiester linkage to form a dinucleotide. More nucleotides are joined in a similar manner to form a polynucleotide chain.
A male human is heterozygous for autosomal genes A and B. He is also hemizygous for hemophilic gene h. What proportion of sperms will carry abh.
Heterozygous for A and B ;Hemizygous for h.
Therefore the genotype would be:
(hemizygous for h as in for human males can only fall on X)
(hemizygous for female would be Xh X)
All the kinds of gametes you can get with this,,,
but they are asking for portion of abXh..
Therefore its 1 / 8
So, the correct answer is '1 / 8'.
The antrum is filled with fluid and is found in:
So, the correct answer is 'Graafian follicle of ovary'
Ester linkages occur in:
Lipids are actually triglycerides .a triglyceride consist of glycerol and fatty acids which are held together by Ester linkages in condensation reaction releasing three water molecules.
Two kingdom classification was established by:
What is the main function of prostomium in earthworm?
Earthworms use the prostomium to see their environment, as earthworms have no eyes, ears, nose or hands. They depend on the prostomium and skin to help it feel their way through the soil.
What is the principal role of white blood cells in humans?
Nucleus is the site of:
In nucleus, there is a region called nucleolus there will be the synthesis of r-RNA.
Classification of chromosomes with regards to shape based on:
Classification of chromosomes is based on position of middle part of centre of chromosome which is known as centromere.
Chromosome with centromere slightly away from center is known as:
Sub-metacentric chromosome or submedian centromere: The centromere is present slightly away from the center of a chromosome or nearer to one end of the chromosome. As a result, the chromosome is divided into one shorter and one long arm.
Types of chromosomes:
Macro molecule chitin is
The essential chemical components of many coenzymes are:
Essential chemical components of many coenzymes are vitamins,
Example: Coenzyme nicotinamide adenine dinucleotide (NAD) and NADP contain the vitamin niacin.
Where do certain symbiotic microorganisms normally occur in human body?
Caecum, a part of the large intestine, is a small blind sac that hosts some symbiotic micro-organisms which help in the synthesis of Vitamin - B12 and helps in digestion.
Argentaffin cells in human beings are found in:
Argentaffin cells are located in deep parts of principal (fundic) glands found in the fundus part of stomach. These cells secrete gastrin, motilin, serotonin, somatostatin, histamine and 5-hydroxytryptamine.
Which of the following is is true about Inspiratory capacity:
Inspiratoty Capacity (IC) is volume of air a person can inspire after a normal expiration. This includes tidal volume and inspiratory reserve volume (TV+IRV).
The most powerful respiratory stimulus for breathing in a healthy person is:
When we breathe in, we inhale many gases, including oxygen, What happens to the gases that the body can’t use?
When we inhale, many gases are present in air, as the saying goes, the air we inhale includes oxygen carbon dioxide etc, when we exhale, the gases that is not needed will be released.
The cells involved in inflammatory reactions are
Hence blood cells involved in inflammatory reactions are Basophils.
The heart sound (lubb) is associated with the closure of:
What would be the cardiac output of a person having 72 heart beats per minute and a stroke volume of 50 ml?
Vasa recta is:
Renal blood supply:
Bone has a very hard matrix due to the presence of:
The hardness and rigidity of bone is due to the presence of mineral salt in the osteoid matrix, which is a crystalline complex of calcium and phosphate (hydroxyapatite).