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The fluid part of semen is contributed by

i. Seminal vesicle

ii. Prostate

iii. Urethra

iv. Bulbourethral gland

Consider the diagram below which represents photosynthetic reactions. Choose the option that correctly matches the labels (i), (ii), (iii). Also the option must match for the involvement of chlorophyll in a-Light reaction or b-Calvin-Benson Cycle.

The process in which new organisms are formed by an existing organism is called .................

Why is sleeping under a tree at night not advisable?

Which is correct sequence of Binary fission in a bacterium?

Shankar wants to grow disease resistant variety of a plant in an area. Which of the following method will help him to do so ?

Lac operon is called negative regulation because__________

The organisms appear to be endangered due to their some behavioral habits like shyness

Choose the correct option regarding sustainable development?

Sub-aerial stem modification with long internode is

Find molarity of $H^{+}$ ions if 49 g $H_{2}S{O}_4$ is dissolved 250 mL solution​.

A mixture containing DNA fragments, A, B, C and
D, with molecular weights of A+B=C, A>B, D>C, was subjected to agarose
gel electrophoresis. The positions these fragments from anode to cathode sides
of the gel would be

What are the functions of the labeled parts 1 and 2 in the diagram?

(a) In cockroaches, air enters the body through

(i) lungs

(ii) gills

(iii) spiracles

(iv) skin

(b) During heavy exercise, we get cramps in the legs due to the accumulation of

(i) carbon dioxide

(ii) lactic acid

(iii) alcohol

(iv) water

(c) Normal range of breathing rate per minute in an average adult person at rest is

(i) 9 - 12

(ii) 15 - 18

(iii) 21 - 24

(iv) 30 - 33

(d) During exhalation, the ribs

(i) move outwards

(ii) move downwards

(iii) move upwards

(iv) do not move at all

Ozone layer _________ the sun's harmful UV rays and protects the Earth from its harmful effects.

What is the name of the chemicals present in the swollen terminal endings of neurons?

Enter 1 word only

Name the hormone that regulates the rate of basal metabolism.

Enter 1 word only.

(a) What is the function of the respiratory system ?

(b) What are the major organs of respiratory system in man (or humans) ?

(c) Draw a labelled diagram of the human respiratory system.

Why do insectivorous plants trap insects?

Among the given options, which one is not correct about the use of large amount of fertilizers and pesticides?

The union of veins from legs and trunks form the _____

Identify the important function of spinal cord from the given choices

list the characteristics of respiratory surface in vertebrates

In an aquatic ecosystem, the trophic level equivalent to cows in grasslands is:

The loss of water as water vapour from the aerial parts of a plant is known as

(a) evaporation (b) perspiration

(c) guttation (d) transpiration

How is movement of leaves of touch me not plant and movement of plant towards light different ? (3 points)

Define the terms pollination and fertilization. Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:

OR

Describe in brief the role of (i) testis (ii) seminal vesicle, (iii) vas deferens, (iv) ureter and (v) prostate gland in human male reproductive system.

Find what is common in the images given below.

Is there difference between ptyalin and salivary amylase secreted in mouth ?

What is the significance of the testes being located in scrotal sacs outside the abdomen? Can there be any abnormal situation regarding their location? If so, what is that and what is the harm caused due to it?

Schwann cells are associated with ___.

Which plant hormone bend towards the light?

In respiration, air passes through