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In Bt cotton, Bt refers to?

What is the difference between National Park and Wildlife sanctuary

Why is energy needed for life processes

Does nucleus also have ribosomes and Cellular totipotency and regeneration are similar ?

Thanks to Byju's for clearing my doubts till date.

Viruses have the capacity for evolution. Why if true or why not if false?

We commonly call. ATP as the energy currency of the cell. Can you think of some other energy carriers present in a cell? Name any two.

A chromosome having a centromere at its middle is

Which of the following are characters of a lenticel?

Which among the following is true regarding the replication of DNA?

Four regions of electromagnetic spectrum (other than visible light) in increasing order of wavelength are

What are 3 $R^{{}^{\prime }}$s used to save environment?

Which of the following increases in muscle cells when they are lacking in oxygen ?
(a) carbon dioxide
(b) lactose
(c) lactic acid
(d) uric acid

Identify the hormone which helps in facing emergency situations from the following options.

Which of the following is responsible for heredity in most organisms?

The diagram given below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.


Which of the following are True?
(a) The chemical substance numbered 2 is Potassium Hydroxide (KOH)
(b) The process which is reverse of photosynthesis in terms of the end-products is respiration.
(c) The special condition inside the flask is that the substance placed inside absorbs all the C$O_2$ and the leaf gets no C$O_2$.

Sunken stomata and thick cuticle

Match the following:

$$\begin{array}{cc}Technique& Principle\\ 1.Geneticengineering& A.Usinganimalstogetmedicine\\ 2.Pharmanimals& B.Replacementofdefectivecopyofgene\\ 3.Genetherapy& C.Testingarrangementofnucleotides\\ 4.DNAFingerprinting& D.Insertionofdesiredgeneintotargetorganism\end{array}$$

Where is the male gamete formed :
(i) in humans ?
(ii) in flowering plants ?

Differentiate between the following pairs with reference to the aspect in brackets.

(a) Cerebrum and cerebellum (function).

(b) Sympathetic nervous system and parasympathetic nervous system (overall effect on the body).

(c) Sensory nerve and motor nerve (direction of impulse carried).

(d) Medulla oblongata & Cerebellum (function).

(e) Cerebrum and spinal cord (arrangement of cytons and axons of neurons).

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:

What can be inferred from a particular trait multiplied at a faster rate in a population over successive generations ?

Identify the cell organelle.

What is mutualism? Mention any two examples where the organisms involved are commercially exploited in agriculture.

OR

List any four techniques where the principle of ex-situ conservation of biodiversity has been employed.

An irreversible, permanent increase in the size of an organ or its part or even of an individual cell is _______.

When a person faints which part of the brain is affected...?

An iodine deficiency in the body will affect the synthesis of _____.

Pyramid of numbers deals with the number of

Why bears were brown in color many years ago?

How oxygen origin in earth?

Diseases are classified on the basis of

Match the hormones given in column I with their functions given in column II :

$\begin{array}{cc}\text{Hormones}& \text{Functions}\\ \text{(i) Thyroxine}& \text{(a) Causes breasts to develop in females}\\ \text{(ii) Adrenaline}& \text{(b) Causes the male to start producing sperms}\\ \text{(iii) Insulin}& \text{(c) Prepares the body for an emergency}\\ \text{(iv) Estrogen}& \text{(d) Controls the metabolic rate}\\ \text{(v) Testosterone}& \text{(e) Regulates the amount of sugar in blood}\end{array}$

A hybrid with desirable traits is obtained by

Which part of the flower forms the fruit?

How do we get the smell of an incensed stick? (please describe the entire journey for 10 marks)

Why does a baby cry when he takes birth?(human baby)

I seem to ________ two copies of this book.

The female gamete produced by the ovary is called ___. It is haploid in nature.

The failure of chromosomes to separate during cell division is known as:

Rearrange the following and match them with their correct descriptions:

1. REESSNETOTOT
2. IROTEG
3. UNISILN
4. TAPYRITIU

Description

(i) This gland secretes the growth hormone in the body
(ii) This hormone helps in regulating the blood sugar levels
(iii) Iodine deficiency leads to this condition
(iv) Hormone secreted in males at puberty

What do testes produce?

Animal cells lack

Which of these is the main function of the pinna?