Q. In forest ecosystem, the pyramid of energy is

1. Always upright
2. Always inverted
3. first upright then inverted
4. None of the above

Q. When is world environment day celeberated?

Q. Write the full form of H.I.V.

Q. Write the name of four respiratory disorders with symptoms.

Q. Draw a labelled diagram of L.S. of human teeth.

Q. ............ is the chief component of chlorophyll.

Q.

Write any four physiological adaptions found in aquatic plants.

Q. Sertoli cells are found in

1. Ovary
2. Testis
3. Kidney
4. Liver

Q. Write names and functions of enzymes present in gastric juice of human.

Q. The loss of water in the form of droplets from the margins of leaves is called as what?

Q. The process of double fertilization (triple fusion) was discovered by

1. Nawaschin
2. Leeuwenhock
3. Starsburger
4. Hafmeister

Q. Match the followings :

Q.

Explain two physiological effects of auxia.

Q.

What is green house effect? Write its two control measures.

Q. Write four differences between spermatogenesis and oogenesis.

Q. Write the name of the genetically engineered human Insulin.

Q. What is called the statistical study of human population?

Q.

Write the botanical name of two medicinal value of safed musli and amla.

Q. Glycolysis process completes in what part of the cell?

Q. Cacsuta is a .......... parasite plant.

Q.

What is biodiversity? Write three efforts for conservation of biodiversity.

Q. Number of cervical vertebrae in human being is

1. 9
2. 6
3. 7
4. 12

Q. Write the name harmful chemical substances of tobacco.

Q. There are ............ chambers in the heart of the cockroach.

Q.

What is double fertilization? Write its significance.

Q.

What is ageing ? Write three important symptoms in human body.

Q. Draw a labelled diagram of T.S. of spinal cord and write its one important function.

Q. Tendons join

1. Bones with bones
2. Muscles with muscle
3. Muscles with nerve
4. Muscles with bones

Q. Write the names of active ingredients and the medicinal uses of the following medicinal plants:
(i) Amla, (ii) Haldi, (iii) Tulsi, (iv) Neem.

Q. Write the role of liver in excretion.