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Australopithecus afarenesis emerged in ___ epoch.

In plants, transportation of water is due to _______.

Assertion: Filariasis causes abnormal swelling in our legs.

Reason: Worms stay in the lymph ducts blocking the ducts.

Match the following of column A with column B

$$\begin{array}{cc}ColoumnA& ColoumnB\\ 1.\text{Parathyroid}& a.\text{fight or flight response}\\ 2.\text{Growth hormone}& b.ADH\\ 3.Adrenaline& c.Tetany\\ 4.Hypothalamus& \text{d.Pituitary gland}\end{array}$$

\end{array} "

In which of the following are the largest amounts of nitrogen excreted from a mammalian body ?
(a) breath
(b) sweat
(c) urine
(d) faeces

Question 61

Name the energy currency in the living organisms. When and where is it produced?

Name the major veins which pour blood into right atrium.

Statement I:Breathing through mouth is not recommended.

Statement II: It is because mouth doesn't have any filter mechanism like nostrils to filter dust from air while breathing.

Mendelism is related with________.

Which type of sex chromosomes are carried by male gametes-sperms in human male?

The floral formula of Indigofera is represented by

What is the full form of BCG?

Enter not more than 5 words.

Match the following diseases and their causes.

$\begin{array}{cc}Disease& Causes\\ 1)Stroke& A)Depositionofexcessfatintheliver\\ 2)Diabetes& B)Decreaseindiameterofarteries\\ 3)Hypertension& C)Ruptureofbloodvesselsinthebrain\\ 4)Fattyliver& D)Malfunctioningofinsulin\end{array}$

Question 35

During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the



(a) Cytoplasm

(b) Chloroplast

(c) Mitochondria

(d) Golgi body

Which of the following statement is the correct meaning of afforestation?

How is the equal genetic contribution of male and female parents ensured in the progeny? [5 MARKS]

Question 12
The correct sequence of anaerobic reactions in yeast is

(a) $Glucose\stackrel{cytoplasm}{\to }Pyruvate\stackrel{mitochondria}{\to }Ethanol+Carbondioxide$
(b) $Glucose\stackrel{cytoplasm}{\to }Pyruvate\stackrel{cytoplasm}{\to }Lacticacid$
(c) $Glucose\stackrel{cytoplasm}{\to }Pyruvate\stackrel{mitochondria}{\to }Lacticacid$
(d) $Glucose\stackrel{cytoplasm}{\to }Pyruvate\stackrel{cytoplasm}{\to }Ethanol+Carbondioxide$

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans

Evolutionary change is not possible in:

A population of red beetles lives in green bushes in a garden. Once during the process of breeding, a green beetle is produced.
(a) State whether the change in colour of beetle is a process of evolution or not.
(b) Can the new colour of green beetle be passed on to its next generations?
(c) What will be the advantage (if any) of the green colour to the beetle?
(d) State whether the production of green colour involved a change in genetic material or not.

The vaccine for which disease is made up of cellular parts of the pathogen?

What
was the terrible deed done by the Mariner? Why do you think he did
it?

Another name for birth rate is ___.

How does the female body limit the number of follicles that would prepare for eggs to be released?

Match the following

$$\begin{array}{cc}\text{A. Fight or flight}& \text{1. Pituitary}\\ \text{B. Growth Hormone releasing factor}& \text{2. Thyroid}\\ \text{C. Growth hormone}& \text{3. Adrenaline}\\ \text{D. Iodine}& \text{4. Hypothalamus}\end{array}$$

The process of converting nitrate to nitrogen gas and nitrous oxide is called

Which among the following is not a function of the amniotic fluid?

Which one of the following cannot be detected in
a developing foetus by amniocentesis

(a) The reproductive part of a plant is the

(i) leaf

(ii) stem

(iii) root

(iv) flower

(b) The process of fusion of the male and female gametes is called

(i) fertilisation

(ii) pollination

(iii) reproduction

(iv) seed formation

(c) Mature ovary forms the

(i) seed

(ii) stamen

(iii) pistil

(iv) fruit

(d) A spore producing organism is

(i) rose

(ii) bread mould

(iii) potato

(iv) ginger

(e) Bryophyllum can reproduce by its

(i) stem

(ii) leaves

(iii) roots

(iv) flower

Given below is a diagram of two systems together in the human body.

(a) Name the systems

(b) Name the parts numbered 1-10.

(c) Describe the functions of the parts 3, 4, 5 & 6.

Which of the following stimulates other white blood cells for defense activity?

brain contains fluid filled balloon. give reason

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

Match the following transcellular fluids with their functions:

$$\begin{array}{cc}\text{i. Synovial Fluid}& \text{a. Maintains shape and size of cell}\\ \text{ii. Intraocular fluid}& \text{b. Acts as a shock absorber}\\ \text{iii. Cerebrospinal fluid}& \text{c. Maintains pressure}\\ \text{iv. Intracellular fluid}& \text{d. Acts as lubricant}\end{array}$$