Explore topic-wise InterviewSolutions in .

Which of the following type of energy is usedby livingorganisms to perform vital lifeprocesses? Kinetic energy, Chemical energy, Nuclear energy.

Which part is connected to the uterus through the cervix?

The rate of transpiration in plants is dependent upon

Answer the following.

Who implement the laws related to pollution?

Question 5

If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?



(a) Proteins breaking down into amino acids

(b) Starch breaking down into sugars

(c) Fats breaking down into fatty acids and glycerol

(d) Absorption of vitamins

What are the raw materials needed for the photosynthesis ?for 2or &3marks

A. Most primitive member of the human race.

B. Cranial capacity is $460{\text{cm}}^3$.

C. First fossils were discovered from France.

Which of the above are true regarding Ardipithecus ramidus?

If the reabsorption of aqueous humour does not occur, it causes a defect known as _________.

Match the items in column I with those in column II and write down the matching pairs (some may not match)

Column I Column II

(a) Acrosome (i) An embryo which looks like human baby

(b) Gestation (ii) Luteinizing hormone

(c) Menopause (iii) Ovum producing cells

(d) Foetus (iv) Semen

(e) Oogenesis (v) Spermatozoa

(f) Ovulation (vi) Complete stoppage of menstrual cycle

(vii) Time taken by a fertilised egg till the delivery of babay.

When is dialysis carried out?

Match the following columns and select the correct option:

(क) नीना चुन्नू और टिंकू से ही दाल क्यों बनवाना चाहती होगी?

(ख) बच्चों ने खाने-पीने की चीज़ें छींके में क्यों रखीं?

(ग) चुन्नू ने दाल को पहले खट्टा फिर मीठा क्यों बताया?

Kalam owes his honesty and self-discipline to his

(a) brothers

(b) father

(c) mother

When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by the tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D pushes the food into the stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of the stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into the small intestine for further digestion.
(a) What is (i) gland A (ii) substance B, and (iii) enzyme C?
(b) Name the tube D.
(c) What is the movement E known as?
(d) What are (i) F (ii) G, and (iii) H?

Which organelle(s) help Amoeba to capture food?

Question 9
Prepare a brief speech on global warming. You have to deliver the speech in your class.

Assertion: Length of the small intestine in cows is longer than in tigers.

Reason: Cellulose digestion takes lesser time than digestion of flesh.

A person has problems with calcium absorption in his body. Which one of the following glands may not be functioning properly?

Match the following.

$\begin{array}{cc}\text{a. Pepsinogen is secreted}& \text{i) Liver}\\ \text{b. Trypsin is secreted}& \text{ii)Pancreas}\\ \text{c. Bile is produced}& \text{iii) Gall bladder}\\ \text{d. Bile is stored in}& \text{iv) Gastric glands}\end{array}$

Identify the factors affecting respiration in plants.

In which state does water enter and leave a plant?

The probability of the $F_1$ dihybrid producing gametes with two recessive genes is:

Which of the following is not an air pollutant?

Which of the following may be used to obtain an $F_2$ generation ?

(a) allowing flowers on a parent plant to be self -pollinated

(b) allowing flowers on an $F_1$ plant to be self -pollinated

(c) cross-pollinating an $F_1$ plant with a parent plant

(d) cross-pollinating two parent plants

Who coined the term cytology

During a breathing cycle, why do lungs always contain a residual volume of air in it?

The diagram below shows undisturbed sedimentary strata at the bottom of an ocean. The fossils found in layer B resemble the fossils found in layer A. This similarity suggests that:

_______is the unwanted/undesirable _______.

Chromosomes are present inside the nucleus of cells. There are ___________ pairs of chromosomes found in human beings. A pair of corresponding chromosomes of the same size and shape is called a __________________ pair. In the pair both parents contribute one chromosome.

Haploid cells have only ______________ the chromosomes of diploid cells. If an organism has more than a pair of homologous chromosomes, the organism is said to be ______________________________. E.g.: ____________________________. The number of chromosomes varies from organisms to organisms.

How does blood circulate between lungs and heart in human beings ?

Following (A,B,C and D) are four closely related species, having similar amino acid sequences in their haemoglobin chain. If amino acid substitution occurs in the chain of haemoglobin in an order given in table, then their evolutionary pattern can be depicted by

Sewage contains harmful nutrients such as phosphorus and ________.