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Match the following:

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One of the following statements is not true about thyroxine. This is :

(a) Thyroid gland requires iron to synthesise thyroxine

(b) It regulates carbohydrate, protein and fat metabolism

(c) Iodine is essential for the synthesis of thyroxine

(d) Thyroid gland can enlarge due to lack of thyroxine

Name the plant hormones which are responsible for the following effects:

(a) falling of leaves

(b) opening of stomata

(c) bending of stem towards the light

(d) closing of stomata

In an experiment demonstrating the evolution of oxygen in Hydrilla, sodium bicarbonate is added to water in an experimental setup. What would happen if all other conditions are favourable?

In a case study of a patient, the following symptoms were noted: High BMR, Sleeplessness, emotionally disturbed, weight loss and high heart rate than normal. What could be the patient suffering from?

Which among the following three are correct regarding the waves of extinction due to human migration?

$$\begin{array}{cccc}\text{S.No}& \text{Sequence}& \text{Wave of extinction}& \text{Driving force}\\ i.& 1^{st}& \text{Hunting}& \text{Food}\\ ii.& 2^{nd}& \text{Agriculture}& \text{Commercial needs and hunger}\\ iii.& 3^{rd}& \text{Harnessing of fossil fuel}& \text{Need of coal, oil and natural gas}\end{array}$$

The secretion ADH (anti-diuretic hormone) is inhibited by

(a) emotion and stress (b) nicotine

(c) alcohol (d) morphine

What is BCG vaccine used for?

An automatic response that does not involve the control of brain is called ____________ action.

Arrange the following activities in the order of the speed (fastest to slowest) in which they take place.
(i) Movement of mimosa when it is touched.
(ii) Movement of sunflower in response to day and night.
(iii) Growth – related movements of plants.

Which of these hormones stimulate the closure of stomata in epidermis of a leaf?

A person has small stones in his kidney. What can be employed to treat it and how? [2 MARKS]

What was Mendel's most important contribution to the modern understanding of biology?

What is Medula Oblongata and it's functions?

Identify the incorrect statement(s).

I. The nerves carrying impulses from CNS to the peripheral system are Sensory nerves or Afferent nerves

II. The nerves carrying impulses from the peripheral system to CNS are Motor nerves or Efferent nerves

III. Sensory system coordinates auditory, visual, touch receptors etc.

IV. Motor system coordinates impulses towards effector organs.

What is the role of interneurons in the reflexive withdrawal from a painful stimulus?

If a person suffers blood loss, what exactly the body will go through to maintain homeostasis?

Why do organisms reproduce?

After all, reproduction is not necessary to maintain the of the individual organisms, unlike the essential life of an individual respiration, or excretion.on the other hand, if individual organism is going to create more individuals ,a lot of its energy will be spent in the process.

So why should an individual organism waste energy on a process it does not need to stay alive?

How to facilitate cloning into a vector

Meditation helps in

The major advantages of sexual reproduction in higher organisms are ___________.

What is the unit of the excretory system?

Enter 1 word only.

Match the global warming activities given under column I with respective greenhouse gases produced under column II.

We know how a solid food gets digested in our stomach. What happens to the water we drink? Is the drinking of water also called digestion in our tummy?!

Which amongst the following are homologous

The phenomenon by which the living or dead plant cells absorb water by surface attraction is ___ .

What do the RBCs pick up from the lungs and transport to rest of the body?

Aspergillus itaconius is used in the production of ___

What is the difference between grey matter and white matter?

Heart beats faster in small organisms compared to the larger ones.

Why does testes lie outside the abdomen in human males?

What evidence do we have for the origin of life from inanimate matter (lifeless matter)?

(a) Define 'speciation'. Explain how speciation occurs.
(b) Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Give the reason for your answer.

Outline a project which aims to find the dominant coat color in a dog.

Radioactive wastes contribute to _____ .

A person suffering from kidney stones is advised to avoid excess intake of spinach and beet roots in his diet. What could be the possible reason?

Name the two parts of a plant through which its gaseous waste products are released into the air.

In acid rain the pH of water is below

7

6.5

6

5.6

The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosomes D in half of the gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, the combination of B and E chromosomes produces a male zygote.

(a) What are chromosomes (i) B (ii) D, and (iii) E?

(b) Out of B, D and E, which two chromosomes are of the same type?

(c) Which chromosome is smaller in size?

(d) What is the general name of chromosomes such as B and E?

(e) Out of the two persons A and C, which one is (i) male, and (ii) female?

Which part of the Brain is responsible for controlling pain and pleasure?

All plants of a pure line have

Which of the following is the basic unit of nervous tissue?

Impulses from photoreceptors are carried to the brain by

Peculiar water driven tube system is the unique feature of the following group: