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Identify (i),(ii) and (iii) from the given table.

Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called :

(a) phototropism

(b) thigmonasty

(c) chemotropism

(d) photonasty

why is it neccssory to seprate oxygenated and deoxygenated blood in mammals and birds ?

A) The modern species and the Texas Duck seem to have diverged approximately one million years ago.

B) One, the well-documented Texas Duck Meleagris californica, became extinct recently enough to have been hunted by early human settlers, though its actual demise is more probably attributable to climate change at the end of the last ice age.

C) In the modern genus Meleagris, a considerable number of species have been described, as Duck fossils are robust, fairly often found, and Ducks show much variation among individuals.

D) Many of these supposed fossilized species are now considered junior synonyms.
___

Name the plant part:

(a) which bends in the direction of gravity but away from light

(b) which bends towards light but away from the force of gravity

Insulin dependent diabetes is caused by the degeneration of __ cells of pancreas due to a defective gene.

Mendel used true breeding pea lines for his experiments because -

Which of the following valves will shut during diastole of the left ventricle?

Mutation is deemed as a necessary evil because:

Fill in the following blanks with suitable words :
(a) The process of ___ ensures continuity of life on earth.
(b) Plasmodium reproduces by the process of ___ fission whereas Paramecium reproduces by the process of ___ fission.
(c) Rose plants and sugar cane crop are usually grown by the ___ method.
(d) Vegetative reproduction of potato plants is done by using ___
(e) Strawberry plants are propagated by the natural ___ method.

The pollen grains in a flower are transferred to stigma of another flower by

Mature ovum in human being is surrounded by

The embryo at the 16-celled stage is known as:

What is the role of estrogens in the female’s body ? Where are they produced?

Phenomenon in which hybrids acquire the superior characteristics of both the parents is known as

A higer concentration of ethylene is found in :

(a) green banana (b) ripe banana

(c) fresh potato tuber (d) green apple

Bacteria that are useful for cleaning the hydrocarbon and oil pollutants.

DifferDiff between Pepsin and trypsin.

Which among the following are water-borne diseases?

The position occupied by a gene or a factor on a chromosome is called:

Pituitary gland is located at a specific part of the brain called as _____.

Which of the following phylum has pseudocoelom?

Choose the incorrect statement

The organism studied for industrial melanism was a

Different types of cement have different setting time. What could be the possible reason for this?

”Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues ". State the reason to explain how and why it happens?

Which of these symptoms would be common among individuals suffering from diabetes insipidus and diabetes mellitus?

Select the right option, with respect to the given statements:

Statement 1: Lamarck said that all the acquired characters are inherited by the next generation.

Statement 2: Darwin sais that only useful variations are transferred to the next generation.

Which of the following will produce genetically identical individuals?

According to the accepted concept of hormone action, if receptor molecules are removed from target organs, the target organ will

The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body.
(a) What is (i) tissue A (ii) pigment B, and (iii) colour C?
(b) Name (i) D (ii) E (iii) F, and (iv) G.
(c) Name one substance (other than oxygen) which is transported by tissue A in the human body.
(d) Which two components of tissue A are the cells without nucleus
(e) Name any two organisms (animals) which do not have liquid like A in their body.

What is ADH and what is its function?

Choose the correct statement.

Question 04(vi)
Indicate whether the following statements are True (T) or False (F).
Amoeba reproduces by budding. ( )

Question 3
What are the raw materials that are obtained by an organism externally?

Question 26
The internal (cellular) energy reserve in an autotroph is

(a) Glycogen
(b) Protein
(c) Starch
(d) Fatty acid

What is progeny? Explain it.

Question 27
Dwarfism results due to:

(a) Excess secretion of thyroxin
(b) Less secretion of growth hormone
(c) Less secretion of adrenaline
(d) Excess secretion of growth hormone

Which parts of speech are the underlined words?

Drink your milk before going to play.

I want to have a cold drink.