Read the given statements and select the correct option.
Statement 1 : It takes a much longer time and covers more distance to stop a moving ship in water than a moving car with same speed on the road.
Statement 2 : The friction on water surface is much less than the solid surface.
ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.
Select the correct statement regarding cell wall of plant cells.
APrimary cell wall is chiefly composed of a soluble fibrous polysaccharide called suberin.
BSecondary cell wall is mainly composed of lignin and is deposited on the outer surface of primary wall.
CPits are present in primary walls whereas they are absent in secondary walls.
DThe primary cell walls of adjacent cells are cemented through middle lamella which is composed of calcium and magnesium pectate.
Neetu took equal amount of three types of soil X, Y and Z in three different troughs.
Then, she poured 100 mL of water in each trough. The results obtained after some time are shown below.
Now, select the INCORRECT option regarding this.
ASoil X is most suitable for making pots.
BSoil Y is most suitable for making base of an artificial pond.
CPlants like cactus can grow well in soil Z.
DSoil X is suitable for growth of most plants.
Which of the following is an incorrect statement regarding adaptations of polar bear ?
AShort and thick feathers of polar protect them from cold.
BPolar bear has a layer of fat under its skin which insulates its body from extreme cold.
CPolar bear has white fur so that it is not easily visible in the snowy background and is protected from its predators.
DPolar bear has long curved and sharp claws which help it to walk on ice.
A polar bear does not have feathers.
Refer to the given flow chart and select the correct option regarding P, Q, R and S.
AP could be wild buffalo whereas Q could be chinkara.
BQ could be golden langur whereas S could be passenger pigeon.
CR could be Hawaiian crow whereas S could be Asiatic lion.
DQ could be Asiatic wild ass whereas R could be Tibetan antelope.
crct ans=b ...just learn the name
Identify P, Q, R and S in the given Venn diagram and select the incorrect option regarding them.
AP could be a colourless organelle that helps to store reserve food in the form of lipids, carbohydrates and proteins.
BQ could be an organelle that is involved in formation of spindle during cell division.
CR could be an organelle that contains genetic material organised as DNA along with proteins to form chromosomes.
DS could be an organelle that produces energy currency of the cell, ATP through cellular respiration.
P,Q,R,S Could be leucoplast, centrosome,ribosome,mitochondria respectivelyC Is correct answer...nucleus contains genetic material
Ans 1: (Master Answer)
According to the given Venn diagram, cell organelles P, Q, R and S could be leucoplast, centrosome, ribosome and mitochondria respectively. Nucleus is a specialised double membrane bound protoplasmic body which contains genetic material organised as DNA along with proteins to form chromosomes.
Refer to the given figure and select the incorrect statement regarding labelled parts W, X, Y and Z.
ADeficiency of hormone released by W could result in retarded growth of the body.
BDeficiency of hormone released by X during childhood could cause mental impairment and reduced growth whereas in adults it leads to reduced metabolism.
CDeficiency of hormone released by Y could negatively affect development of gametes and differentiation of secondary sexual characters in males and females.
DDeficiency of hormone released by Z may cause a rise in blood sugar level leading to a condition called diabetes mellitus.
W-Pitutary gland X-Thyroid gland Y-Adrenal gland Z-Pancreas adrenal glands control emotions