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Cotyledon of maize grain is called?
Pneumatophores occur in:
Identify the correct statements related to the androecium in the flower: (a) Sterile stamens are called staminodes. (b) When stamens are attached to petals, they are called epipetalous. (c) Monoadelphous stamens are found in China rose. (d) Polyadelphous stamens are found in Pea. (e) Variation in the length of filaments is seen in Salvia and Mustard.
Two identical charged spheres suspended from a common point by two massless strings of lengths l are initially at a distance d (d << l) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as:
A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F1 plants had yellow seeds and pink flowers. The F1 plants were selfed to get F2 progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the F2 generation?
Mental retardation in man occurs due to:
Which of the following pairs is correctly matched regarding the Electron Transport System (ETS) complexes?
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): A father will never pass the gene for haemophilia to his sons. Reason (R): Haemophilia is sex-linked (X-linked recessive trait). In the light of the above statements, choose the correct answer from the options given below:
Double fertilization is:
Which one of the following growth regulators is known as the stress hormone?
Identify the correct set of statements: (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea. (b) Axillary buds form slender and spirally coiled tendrils in Cucumber and Pumpkin. (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves. (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration. (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation.
Which of the following plants possesses the placentation of ovules borne on central axis with no septa?
$\alpha$-D-glucose and $\beta$-D-glucose are:
The velocity of a bullet is reduced from $200 \text{ m/s}$ to $100 \text{ m/s}$ while travelling through a wooden block of thickness $10 \text{ cm}$. The retardation, assuming it to be uniform, will be:
A dioecious flowering plant prevents both:
In the assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in fallopian tube?
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in males. It proves:
The product formed from the following reaction sequence is:
The correct sequence of bond enthalpy of 'C—X' bond is :
If the principal quantum number n=6, the correct sequence of filling of electrons will be: