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Which of the following cannot be detected in a developing foetus by amniocentesis?
Cotyledon of maize grain is called?
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.
Double fertilization is:
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in males. It proves:
A dioecious flowering plant prevents both:
The site of perception of light in plants during photoperiodism is
Free-central placentation is found in?
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:
Mental retardation in man occurs due to:
Match List-I with List-II: List-I A. Parathyroid hormone B. Epinephrine and Nor-epinephrine C. Thyroid stimulating hormone D. Melatonin List-II I. Flight or fight response II. Regulates the body's biological clock III. Increases blood Ca2+ level IV. Synthesis of hormones
Diaphragms, cervical caps and vaults are:
In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?
Match List-I with List-II. List-I A. Centromere B. Cilium C. Cristae D. Cell membrane List-II I. Mitochondrion II. Cell division III. Cell movement IV. Phospholipid Bilayer
Which scientist conducted an experiment with 32P and 35S labelled phages for demonstrating that DNA is the genetic material?
Which of the following statements is not correct?
A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is:
Which one of the following growth regulators is known as the stress hormone?
Pneumatophores occur in:
In Hatch and Slack pathway, the primary CO2 acceptor is -