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(a) What is the spinal cord? What is its main function?

(b) Give the functions of the medulla.

Is virus dead or alive?

Question 4
Which of the following statement is incorrect?

(a) For every hormone there is a gene.
(b) For every protein there is a gene.
(c) For production of every enzyme there is a gene.
(d) For every molecule of fat there is a gene.

The process of cutting of food, crushing it by our teeth in the mouth and mixing it with saliva to make it wet and slippery is known as___.

Low blood cholesterol is necessary for good health. Which of the following are the cause of high LDL (high blood cholesterol) levels?

___ is the process of intake of food materials by living organism in a water-soluble form.

Why second constriction point is also known as known as Nuclear organiser region(NOR)?

Explain somatic stem cells?

Nearest and richest source of raw material for plants is :

The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of B contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?

The cell wall is mainly composed of ___ .

List six specific characteristics of sexual reproduction.

How many spinal nerves are present in the peripheral nervous system ?

Which among the following results in an ecological crisis?

The internal energy (cellular energy) reserve in autotrophs is :
(a) proteins (b) fatty acids (c) glycogen (d) starch

Oxygen present in the glucose molecule formed during photosynthesis is obtained from:

State any four differences between menarche and menopause

Please explain monohybrid and dihybrid cross clearly. It is not there in the videos

Name the following blood vessels.

Which among the following is non-circulating fluid?

Which gas is essential for cellular respiration to occur?

Four students P, Q, R and S differently reported the following set of organs to be analogous:

P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat

The two students who have reported correctly are:

Match the following columns:
$\begin{array}{cc}\underset{\left(\text{Respiratory substrate}\right)}{Column-I}& \underset{\left(\text{RQ value}\right)}{Column-II}\\ a)\text{Glucose}& 1)0.7\\ b)\text{Tripalmitin}& 2)0.9\\ c)\text{Protein}& 3)1.33\\ d)\text{Malic acid}& 4)1.0\end{array}$

Which of the following recieves an external stimulus and generates an impulse in response?

Q4. Consider the following statements about Light pollution:

1. Light pollution, also known as photo-pollution, is the presence of anthropogenic light in the night environment.

2. Its negative impacts include increasing energy consumption and disrupting the ecosystem and wildlife.

3. Frequent use of LED technology increases light pollution

Which of the above statements are correct?

Cyclosporin-A is produced by a fungus called Trichoderma polysporum. What is the importance of this in the medical field?

If both sepals and petals are coloured and cannot be distinguished from each other then their whorl is known as .................

(a) How do Mendel's experiments show that traits may be dominant or recessive ?

(b) How do Mendel's experiments show that traits are inherited independently ?

In one of the following organisms, the gaseous exchange during repiration does not take place through cell membrane/skin. This organism is :
(a) Electric eel
(b) Leech
(c) Earthworm
(d) Amoeba

__ united the knowledge of chromosomal segregation with Mendelian principles.

Different versions of the same gene are called _______.

Name the tissue in plants that is involved in the transportation of water and mineral salts.

Which of the following is/are the major reason(s) behind mass extinctions that happened on earth?

Soil pollution can be controlled by

Analogous organs are

All living cells produce ethylene. But one of these tissues are known to produce more ethylene compared to others. Identify the tissue.

A cell will become flaccid when kept in a ___ solution.

The structures built into or on top of the ground in which trash is isolated from the surrounding environment are

Which of these hormones is/are NOT secreted by the pituitary gland?