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Identify the muscular organ of the digestive system which receives food from the oesophagus.

Given below is the image depicting the steps involved in the manufacture of insulin using bacteria through genetic engineering. Match the numbers given in the image with the steps given below.

A. Joining the two DNA segments

B. Multiplication of bacteria

C. Identification of insulin gene

D. Insertion of the new genome into bacteria

E. Cutting the gene and bacterial genome

Sewage water from residential areas and used water from industries must be disposed of directly into the rivers and lakes

Raisins are soaked in water for determining the percentage of water absorbed. The formula for calculating the percentage of water absorbed, is

Which of following is the common feature of cat rat and bat?

Match the substages of prophase I of first meiotic division listed in column I with the important events pertaining to respective stages given under column II; choose the answer which gives the correct combination of alphabets of the two columns:

$\begin{array}{cccc}& ColumnISubstagesofprophaseI& & ColumnIIImportantevents\\ A& \text{Zygotene}& p& \text{Chromomeres}\\ B& \text{Pachytene}& q& \text{Bivalents migrate to periphery}\\ C& \text{Diplotene}& r& \text{Terminalization of chiasmata begins}\\ D& \text{Diakinesis}& s& \text{Crossing over}\\ & & t& \text{Synapsis}\end{array}$

Some of the important fossils which have been studied are those of organisms X, Y and Z, X were marine arthropods which were common between 400 to 600 million years ago. Y were the invertebrate animals (molluscs) with a flat, coiled, spiral shell which lived in the sea about 180 million years ago. Z are the extinct carnivorous or herbivorous reptiles which appeared on the earth about 250 million years ago and became extinct about 65 million years ago. What are X, Y and Z?

The accurate amount of DNA transfer takes place to offsprings when two parents contribute their DNA in sexual reproduction. What is the mechanism/process responsible for this?

The major source(s) of emissions of $S{O}_x$ is/are

Which of the following undergoes meiosis?

Which of the following is not a function of the kidney?

A fish unlike a spirogyra cannot reproduce through fragmentation process. The possible reason for inability of fish is …………………………………

Oxygen is carried by

What is the function of receptors in our body? Think of a situation where receptors do not work properly. what problems are likely to arise. explain.

Adrenaline hormone prepares the body to face emergency situations by__________________

For diffusion or osmosis to take place in root cells difference in ___ is essential.

Define breathing. State the differences between breathing and respiration.

Which of the following reproduces only inside a host cell?

What are the final product of carbohydrates and fats and proteins after digestion?

Which of the given set is mixed with the food in small intestine?

Which of these factors can cause erythroblastosis foetalis when it passes from mother to foetus through placenta?

List the precautions that are to be taken to prepare a temporary mount of leaf peel to show stomata.

In Drosophila, the red-eye character is dominant over white eye character. When a homozygous red-eyed individual is crossed with a homozygous white-eyed individual, and individuals of $F_1$ generation are intercrossed, 12 individuals are produced. White-eyed individuals of these will be:

Carbon monoxide poisoning happens dues to the formation of __________ when carbon monoxide reacts with Hb.

From which of the following do we get information regarding the population of our country?

Question 28

It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short children and vice-versa. Are there factors other than genes, that can cause these variations?

People relieve___by doing meditation.

Addition of which accessory gland secretion turns the sluggish sperms active?

Mendel said that the characteristics or traits of organisms are carried from one generation to the next by internal factors which occur in pairs. What is the modern name for these factors?

Light reaction occurs in ___ of chloroplasts and dark reaction occurs in __.

Name the following :

(a) The category of organisms that prepare their own food from basic raw materials.

(b) The kind of plastids found in the mesophyll cells of the leaf.

(c) The compound which stores energy in the cells.

(d) The first form of food substance produced during photosynthesis.

(e) The organisms that can be called "natural purifiers" of the air.

(f) The source of $C{O}_2$ for aquatic plants.

(g) The part of chloroplast where the dark reaction of photosynthesis takes place

(h) The tissue that transport manufactured type of starch from leaves to all parts of the plants.

Which of the following is responsible for protection of Spinal Cord: