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Which gas in the atmosphere is essential for respiration?

Question 3

Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?

Consider the different parts of the nephron mentioned below:

1) Urine collecting duct

2) PCT

3) DCT

4) Loop of Henle

5) Bowman's capsule

Which of the following depicts the correct order in which these are organised

Match the following columns.

$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ P& \text{Aleurone layer}& 1& \text{Nutrition}\\ Q& \text{Parthenocarpic fruit}& 2& \text{Without fertilization}\\ R& \text{Ovule}& 3& \text{Seed}\\ S& \text{Endosperm}& 4& \text{Double fertilization}\end{array}$

Suggest measures in following situations.

To avoid noise pollution in silent zones.

____is produced by the process of anaerobic digestion of organic material by anaerobes.

The rate of transpiration is more when

(a) atmosphere is dry

(b) temperature is high

(c) humidity is high

(d) atmosphere is dry and temperature is high

What are some of the most pressing environmental concerns of India which are identified on priority?

The basic difference between endocrine and exocrine glands is______________.

Increase in __________ results in the decrease of transpiration.

Identify the incorrect statement about Ribozyme and Abzyme from the following?

Which of the following potometers help in measuring the rate of intake of water by the plant?

Excuse me sir / madam do the superior vena cava have valves ?

Plants can use relatively slow transport system. Why?

When infected by a pathogen, we tend to get fever. What is the primary reason for this?

Name the green dot like structure in some cell observed by a student when a leaf peel was viewed under a microscope. what is this green colour due to?

How does the transportation of food and other substances occur in plants?

Which of these are removed from the body through the skin?

Trachea is lined with incomplete rings of

Which of these are NOT tropic hormones?

The technique used in biotechnology is

Question 47

In the given figure below, label the parts and mention their functions.

1. Production of egg

2. Site of fertilization

3. Site of implantation

4. Entry of the sperms

Considering the average molecular mass of a base to be 500 Da, what is the molecular mass of a double stranded DNA of 10 base pairs?

Infections like tuberculosis tend to increase the count of B lymphocytes in our body. They are known to produce antibodies. To understand why our bodies require more antibodies in the system, we need to know it's functions. Choose the correct functions of antibodies.

The mixture of dust particles, fog and smoke from various sources can be termed as:-

The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:

(a) auxin

(b) gibberellin

(c) abscisic acid

(d) cytokinin

The major function of kidneys is excretion of urea. Urea is a breakdown product of:

If a leaf of a destarched plant is covered with a black paper only on the upper side facing the sun, then will the leaf still absorb light energy??

The short and thick structure found in a nucleus which contains the genetic material and is only visible during cell division is called ___ .

What is the end products of meiosis?

Still working in groups of three, find any ten "happy" words and ten "unhappy" words from the passages you have just read. First, copy and complete the table below:

Based on observations in monohybrid cross, Mendel postulated which of the following laws?

The part of brain which takes part in regulating respiration in the human body is :

(a) medulla

(b) pons

(c) cerebellum

(D) the brain

What is the role of stomata in transpiration?