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The plant capable of producing white flowers consist of more red flowers in number over white flowers. It indicates that

In a pea plant, flower colour purple is dominant over white and fruit shape round is dominant over wrinkled. Crossing was performed between two pure lines-one having purple flower and round fruit, and another with white flower and wrinkled fruit. Plants of F1 were allowed to self-fertilize, and about 960 plants survived in F2. If the traits follow Mendelian inheritance, the number of plants in F2 that would have yellow flowers and round fruits in F2 are:

Define transpiration.

L- glutamic acid is used in the production of monosodium glutamate also called ___

Given below are certain structures. Write against each their special functional activity.
(a) Organ of Corti and ........
(b) Olfactory nerve and ......
(c) Retina and .......

Identify the stage of mitosis by inspecting the image and key changes listed.

Key changes:

* Chromosomes are arranged at equatorial plate.

* Spindle fibres attach to the chromosomes.

Blood is red in colour. Oxygen-rich blood is bright red as it leaves the heart. When it returns to veins without oxygen, it turns blue. Does it mean that the haemoglobin is turned off in the absence of oxygen?

The parasitic worm Ascaris belong to which of the following groups?

Assertion(A): Prolactin is also called ‘Milk ejection hormone’.
Reason(R): Prolactin stimulates contraction of smooth muscles of mammary glands.

How does the creation of variation in a species promote survival?

Match the following glands with the hormones they secrete:

$\begin{array}{cc}\text{Glands}& \text{Hormones}\\ \text{(1) Pituitary gland}& \text{(P) Adrenaline}\\ \text{(2) Testis}& \text{(Q) Growth hormone}\\ \text{(3) Ovary}& \text{(R) Progesterone}\\ \text{(4) Adrenal gland}& \text{(S) Testosterone}\end{array}$

Which is true for zygote?

Question 30
In human beings, the statistical probability of getting either a male or female child is 50:50. Give a suitable explanation.

Sympathetic is to_________________ as parasympathetic is to _____________________.

A species may be reproductively isolated through which of the following causes?

Besides crossing over, which other process in meiosis helps in bringing about variation?

Mango plant develops by:

Shyam is a farmer. Last year, he had a good yield of mangoes and yet suffered a huge loss due to the over-ripening of the mangoes. He does not know which synthetic hormone would be the best to use in order to prevent ripening of fruits. Which plant hormone would you suggest?

The more effectiveness of chemical communication than by electrical impulses is due to:

The myelin sheath is formed by _______ which covers the axons of some neurons.

Why is business responsible for environment protection?

During menstruation which part of the uterus remain intact or not shed with the flow?

The highly sophisticated procedure of directly injecting a sperm into egg is called ___.

Identify the part of the female reproductive system where the ovum matures.

Raphide is not a fruit because-

Diabetes insipidus is due to hyposecretion of

Complete the missing word in the statement given below

(i) Plasma without.....factors is called serum.

(ii) ............... and monocytes are phagocytic cells.

(iii) Eosinophils are associated with........actions.

(iv) ...........ions play a significant role in clotting.

(v) One can determine the heart beat rate by counting the number of ....... in an ECG.

Planaria reproduces by which of the following methods?

Which of the following are nitrogenous wastes?

The term "homologous chromosomes" refers to

___ is essential for the process of respiration in animals.

Mosquito receives air through

What is phloem tissue ?

Phloem contains two types of cells joined side by side. Name these two types of cells. State whether these cells are living or dead.

Name one example of the movement of a plant part which is very quick and can be observed easily.

Choose the correct statement regarding the Interkinesis phase in Meiosis.

Which among the following cannot happen in the absence of genetic variations in an organism?

India exploded her first underground nuclear weapon detonation at ______.

Which part of the kidney contains the nephrons

The pressure exerted by the cell contents on the cell wall is the ___ pressure.

Regarding the assertion and reason, select the correct option.

Assertion [A]: DNA replication is semiconservative in nature.

Reason [R]: One of the DNA strands is synthesised continuously, while the other is synthesised discontinuously.

Which of the following hormones contains iodine and is required to initiate the metabolism of fat?

Which of the following pituitary hormones are controlled by the hypothalamus?