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Thread like structures in the ventricles that prevent valves from turning inwards during ventricular systole.

Enter 2 words only.

Human is dependent on plants for his nutritional requirements. If he starts eating only meat for the entire life, Can we say that he is no longer dependent on plants for survival?

The term 'father of genetics' is used for the scientist :
(a) Morgan
(b) Mendel
(c) Darwin
(d) Marie Curie

Arrange these discoveries in chronological order from oldest to latest.
i. Isolation of a compound called nuclein.
ii. “Heredity factors”
iii. Genes are located on chromosomes
iv. DNA is genetic material

The main dictate(s) of Lamarck's theory is/are:

Which method of reproduction is employed by hydra?

In the given cross section of the seminiferous tubules, which of the labelled cells produce testosterone?

Take three test tubes and label them as A, B and C. Fill $\frac{3}{4}$th of each with water. Keep a snail in test tube A, a water plant in test tube B and in C, keep both snail and plant. In which of these test tubes $C{O}_2$ (carbon dioxide) level will be higher? What does this experiment show? Explain what happens in each test tube separately. [5 MARKS]

The food goes down the oesophagus by:

What is a target site?

Please explain the aerobic respiration and it's three steps

What is replication of DNA.

In absence of oxygen and in lack oxygen (in glucose breakdown pathway) how the energy produced is 2 ATP even though both have different oxygen level?

Stomata remain closed in desert plants during day time. How do they do photosynthesis?

Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?

Only _______ percent of the total water absorbed by the plant is used in photosynthesis and other activities.

During meiosis, crossover occurs between

Write the functions of the following in human female reproductive system:Ovary, oviduct, uterus

How does the embryo get nourishment inside the mother's body? Explain in brief.

Marine mammals possess huge subcutaneous fat deposits to conserve__.

The renal corpuscle is composed of the glomerulus and _______ .

In the following experiment for photosynthesis, a leaf is inserted into a conical flask containing potassium hydroxide. What is the aim of the experiment?

​​

Which of the following statements is/are FALSE?

In cactus, photosynthesis is carried out in the ___.

Which of the following combinations of sex chromosomes produce a male child

XX or XY ?

Q9. Consider the following statements about Blackbuck species of birds:

1. The blackbuck is a large species of antelope native to the Indian subcontinent.

2. They are the “state animal” of Rajasthan.

3. They are considered sacred by the Bishnoi community of Rajasthan.

Which of the above statements are correct?

Which of the following hormone(s) directly control the menstrual cycle?

The layer of fibrous connective tissue that surrounds each kidney is

Match the following:

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(A) High metabolic rate, weight loss}& \text{(1) Graves' disease}\\ \text{(B) Stunted growth}& \text{(2) Hyperthyroidism}\\ \text{(C) Bulged eyeballs}& \text{(3) Cretinism}\\ \text{(D) Low metabolic rate, increased body weight}& \text{(4) Hypothyroidism}\end{array}$

The number of autosomes in human beings is

Identify the following food chain:

Dead animal ---> maggots ---> common frog --->snake

Write a short note on fossil fuels. [3 MARKS]

Question 37
If a potted plant is covered with a glass jar, water vapour appear on the wall of glass jar. Explain why?

Bulk flow is achieved due to a positive hydrostatic pressure gradient in _____and negative hydrostatic pressure gradient in _____ respectively.

___ accounts are direct indicators of the country's economy.

(a) Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.

(b)Write the names of male and female reproductive parts of a flower.

OR

(a)What is fragmentation in organisms? Name a multicellular organism which reproduces by this method.

(b)What is regeneration in organism? Describe regeneration in Planaria with the help of a suitable diagram.

Cytokinins are known to

The nucleolus sits on a semi-solid substance called ___.

Match the following sense organs with the sensations they respond to.

Sense OrganSensations1. Ears A. Sight 2. Nose B. Taste 3. Eyes C. Touch4. Tongue D. Hearing 5. Skin E. Smell

1 - C, 2 - D, 3 - A, 4 - B, 5 - E

1 - D, 2 - E, 3 - A, 4 - B, 5 - C

1 - C, 2 - E, 3 - A, 4 - B, 5 - D

1 - A, 2 - D, 3 - E, 4 - B, 5 - C

Which part of brian is involved in thinking