Home
Class 12
BIOLOGY
Refer to the given statements and select...

Refer to the given statements and select the correct ones.
(i) Fossils are remains of hard parts of life forms in rocks.
(ii) Dinosaurs disappeared about 65 mya.
(iii) Animals called lobe fins evolved into reptiles.
(iv) Study of fossils is called palaentology.

A

I,ii and iv

B

ii and iv

C

i,iii and iv

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Refer to the given figure and select the correct statement. (i) A, B, and C are histogen of shoot apex. (ii) A Gives rise to medullary rays. (iii) B Gives rise to cortex. (iv) C Gives rise to epidermis.

Read the given statements and select the correct option. (i) Loamy soil is best suited for plant growth as it contains a mixture of silt, sand and clay. (ii) The process ofhumification is slow in case of organic remains containing a large amount of lignin and cellulose. (iii) Capillary water is the only water available to plant roots as it is present inside the micropores. (iv) Leaves of shade plant have more total chlorophyll per reaction centre, low ratio of chl a and chl b are usually thinner leaves.

Study the following statements and select the incorrect ones. (i) Physical removal of large and small particles through filtration and sedimentation is called primary sewage treatment. (ii) Secondary sewage treatment is mainly a mechanical process. (iii) Activated sludge sediment in a sewage treatment plant is a rich source of aeroic bacteria. (iv) Biogas, commonly called as gobar gas, is pure methane.

Read the following statements and select the correct ones. (i) Conidia are the asexual propagules restricted to Kingdom Fungi. (ii) Apiece of potato tuber having at least one eye (or node) is capable of giving rise to a new plant. (iii) Ginger propagates vegetatively with the help of its underground roots. (iv) Fleshy buds which take part in vegetative propagation are called bulbilsm present in Dioscorea, Agave, etc.

Read the following statements and select the correct option (i) Blood cells secrete fibres of structural proteins called collagen and elastin (ii) Neuroglial cells protect and support the nephrons (iii) Osteocytes are present in spaces called lacunae (iv) Striated muscle fibres are bundled together in a parallel fashion (v) Biceps are involuntary and striated.

Read the given statements regarding human excretory system and select the correct ones. (i). Presence of glucose in urine is known as uremia. (ii). Distal convoluted tubule (DCT) selectively secretes hydrogen ions, ammonia and potassium ions into the filtrate. (iii). Macule densa is formed by cellular modification in the distal convoluted tubule and the afferent arteriole at their contact location. (iv). Atrial natriuretic factor (ANF) can cause vasoconstriction when blood flow is low to the atria of the heart.

Following is the figure of a saggital section of a human brain.Match the labelled parts with the respective statements given below and select the correct option. (i)Consists of fibre tracts that interconnect left and right hemispheres (ii)Secretes a hormone melatonin (iii)Alcohol interferes with the function of this part (iv)Contains centres which control respiration , cardiovascular reflexes and gastric secretions.

Consider the following three statements and select the correct option stating which one is true (T) and which one is false (F). (i) Some land reptiles went back, into water to evolve into fish like reptiles probable 200 mya. (ii) The first mammals were like shrews. (iii) The work of Thomas Malthus on populations influenced Lamarck.

Study the following statements regarding food chains and select the correct ones. (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. (ii) Removal of most of the carnivores resulted in an increased population of deers. (iii) The lenght of food chains is generally limited to 3-4 trophic levels due to energy loss. (iv) The lenght of food chains may vary from 2 to 8 trophic levels. A) i and ii B) ii and iii C) i and iii D) iii and iv