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Generic name of common toad is

The golgi complex participates in ?

Diffusion
of gases occurs in the alveolar region only and not in the other
parts of respiratory system. Why?

Nucleoside differs from nucleotide with the absence of:

The major cause of cancer is due to uncontrolled cell division which forms a cell mass called ___(i)___. This may occur due to failure in cell regulation. This cell mass reaches other organs through a multi-step process termed ___(ii)___ .

Question 3
Meiosis occurs in organisms during
(a) sexul reproduction
(b) vegetative reproduction
(c) Both (a) and (b)
(d) None of these

Pick up the synthetic auxins:

In bryophytes, the sporophytic phase is represented by

The taxonomic unit 'Phylum' in the classification of animals is equivalent to which hierarchial level in classfication of plants.

(a) Class

(b) Order

(c) Division

(d) Family

Match the element with its associated functions/roles and choose the correct option among given below

$\begin{array}{cc}Column-I& Column-II\\ \text{A.Boron}& \text{i. Splitting of}{H}_{2}O\text{to liberate}{O}_2\text{during photosynthesis}\\ \text{B. Manganese}& \text{ii. Needed for synthesis of auxins}\\ \text{C.Molybdenum}& \text{iii. Component of nitrogenase}\\ \text{D.Zinc}& \text{iv. Pollen germination}\\ \text{E.Iron}& \text{v. Component of ferredoxin}\end{array}$

Which of these options is correct about the leaves at each node in Alstonia?

Difference between binary and multiple fission?(5 amrks)

The stomatal pore is guarded by two kidney shaped guard cells. Name the epidermal cells surrounding the guard cells. How does a guard cell differ from an epidermal cell? Use a diagram to illustrate your answer.

(Bt) strains have been used for designing novel

Chitin is a constituent of a fungal cell wall. Its hydrolysis yields

Chemosensitive area of the respiratory centre in medulla is affected by

Colchicine is a drug known to stop the formation
of spindle fibres. what will happen to when dividing cells in a cell culture
are treated with colchicines

___ is the number of species and the abundance of a particular species that inhabits a particular community.

Chromosomal abnormalities occur during meiosis, a process that produces gametes (eggs and sperm) within human bodies. Abnormalities occur when there is an uneven split of chromosomes into each gamete. The following table shows 6 of the most common syndromes associated with chromosomal abnormalities.
$\begin{array}{cccc}\text{Syndrome name}& \text{Chromosome Affected}& \text{Incidence per 10,000 births}& \text{Type of mutation}\\ \text{Polyploidy}& \text{Extra complete set of chromosomes}& \text{Fatal, doesn't reach full term}& \text{Addition}\\ \text{Patau syndrome}& \text{13}& \text{2}& \text{Addition}\\ \text{Edwardsn syndrome}& \text{18}& \text{3}& \text{Addition}\\ \text{Down syndrome}& \text{21}& \text{15}& \text{Addition}\\ \text{Klinefelter syndrome}& \text{23}& \text{10(affects only males))}& \text{Addition}\\ \text{Turner Syndrome}& \text{23}& \text{2(affects only females))}& \text{Deletion}\end{array}$

(I) Following 30,000 of all births, how many children would be predicted to have Turner syndrome?
(a) 0
(b) 3
(c) 4
(d) 6

(II) From above mentioned table, what is the sex chromosome makeup of a child with Klinefelter syndrome?
(a) XO
(b) XY
(c) XXY
(d) XX

(III) The incidence of Down’s syndrome increases with maternal age, and not significantly with paternal age. What may reasonably explain this trend?
(a) Failure of muscular contractions to correctly fuse the two gametes.
(b) Gradual accumulation in germ-line chromosomal mutations throughout reproductive age.
(c) Maternal oocytes have a longer period of meiosis than paternal spermatozoa, and thus, there are more opportunities for mutations to develop.
(d) Maternal mitochondrial DNA is mutated in Down’s syndrome.

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Which is the correct arrangement of muscle structures from biggest to smallest?

Fill in
the blank spaces:

(a) All
mammals (except a few) have __________ cervical vertebra.

(b) The
number of phalanges in each limb of human is __________

(c) Thin filament of myofibril contains 2 ‘F’ actins and
two other proteins namely __________ and __________.

(d) In a
muscle fibre Ca⁺⁺ is stored in __________

(e)
__________ and __________ pairs of ribs are called floating ribs.

(f) The human cranium is made of
__________ bones.

Which is correct for Threatened (T) species?

Question 5

If a round, green-seeded pea plant (RRyy) is crossed with wrinkled, yellow-seeded pea plant (rrYY), the seeds produced in F1 generation are



(a) round and yellow

(b) round and green

(c) wrinkled and green

(d) wrinkled and yellow

( Round-R, Green-y, Wrinkled-r, Yellow-Y)

Which of the following muscles contract during normal expiration?

If thyroid extract is added to the water containing tadpole, it will

Give the equivalent terms for the following:

(a) Pressure exerted by the cell contents on the cell wall

(b) The condition in which the cell contents are shrunken.

(c) Loss of water through a cut stem.

Organelles having enzymes required for photorespiration are