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Leeches and Earthworms belong to which phylum?

A crop needs to be protected from rodents like rats, fungi and bacteria. They affect the stored grains and are called the _________ factors.

Complete the following table: [5 MARKS]

$\begin{array}{ccc}Digestivejuicesandenzymes& Substancedigested& ProductFormed\\ Saliva& & \\ \text{Amylase}& & \\ Gastricjuice& & \\ \text{Protease (pepsin) and hydrochloric acid}& & \\ Pancreaticjuice& & \\ \text{Proteases (trypsin)}& & \\ \text{Lipases}& & \\ \text{Amylase}& & \\ Intestinalenzymes& & \\ \text{Peptidases}& & \\ \text{Sucrase}& & \\ \text{Lactase}& & \\ \text{Maltase}& & \\ Bilefromtheliver& & \\ \text{Bile salts}& & \end{array}$

Milk is usually adulterated with ____.

Rainforest offer hospitable climatic conditions to support huge population of animals. Explaine how?

Which of the following organisms breath through skin?

Name the chemical used to test the presence of $C{O}_2$ in exhaled air. [1 MARK]

Fertilization in plants occurs in the ________.

Organisms that feed on both plants and animals are called ____.

How is a laboratory thermometer calibrated?

Water from undigested food is absorbed in the _______ .

Satyendra Bose doubted whether all the changes in our daily life were good. To answer his question, Aristotle asked him to do an activity. He asked him to classify the following changes into helpful and non-helpful from their perspective.

1. Farmers harvesting crop

2. Ripening of Fruits

3. Rancidity of food

Define Nitrogen fixation.

Grafting is not possible in________ plants.

Raman took 3 pots namely a,b and c. In all of them , he added soil, a gram seed each aand equal amount of water. In A:, he added chemical fertilizer. In B, he added manure . He didn't add anything in pot C.

A) which pot shows maximum growth of plant?

B) which pot shows minimum growth?

C)which pot shows better growth of plant?

D) give reasons for difference of growth in plants.

Budding is a mode of reproduction observed in _________ .

The maximum temperature of the day is generally recorded in the:

Which chamber of heart has the thickest wall?

Which of the following is the ideal symbolic representation of an immunoglobulin molecule?

Match the following:

$$\begin{array}{ccc}coloumn1& coloumn2& coloumn3\\ a.Calcium& i.Thyroxin& 1.Milk\\ b.Iron& ii.Strengthensourteethandbones& 2.Kelp\\ c.Iodine& iii.Hemoglobin-oxygentrasnport& 3.Kheer,Jaggery\end{array}$$

The respiratory system is regulated by

Statement 1: The body breaks down complex substances in food into smaller components in the digestive system.

Statement 2: Breaking down of food into simpler substances helps in easy and efficient absorption of nutrients.

Which of the following options describes the correct relationship between the two statements?

In which of the organisms is fragmentation and/or regeneration a mode of reproduction?

Write notes.

(a) Homeostasis

(b) Endocrine system

"स्वामीनाथन दादी के पास... बहुत प्रसन्न और सुरक्षित महसूस कर रहा था।"

तुम कब असुरक्षित महसूस करती हो?

Select the incorrect match w.r.t. materials reabsorbed in different parts of the nephron of kidney.

Name three functions of water in the body. [3 MARKS]

Complete the following table:

$$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{Testes}& \text{Production of male gametes called \_\_\_\_\_ (a)}\\ \text{Scrotum}& \text{Climate control system for the \_\_\_\_\_ (b)}\end{array}$$

The number of organisms in population are added by