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The stalk of a leaf is derived from which one of the following types of plant tissue?

Triticale is produced by the crossing of

Plants capture approximately _______________ of the sun's energy while other trophic levels capture about ____________________ of the energy available to them in their food.

Choose the crosses which do not form the plants with the genotypes as YYRR.
I. Yy Rr X Yy Rr II. YY Rr X Yy rr III. YY rr X yy RR IV. Yy RR X YY Rr

In urinary system, aldosterone takes part in

An inactive period when the embryo puts its development on hold is termed as

Regarding assertion and reason, choose the correct option.
Assertion [A]: Interferon alpha helps in treatment of cancer indirectly.
Reason [R]: Interferons alpha is a biological response modifier.

Some of the properties of tissues are not the constituents of its cells. Give three examples to support the statement.

Match the following methods of cell disintegration with the tools they use.
$\begin{array}{cc}ColumnI& ColumnII\\ \text{i. Ultrasonication}& \text{p. treating cells with organic solvents, alkalis and detergents.}\\ \text{ii.Enzymatic lysis}& \text{q. passing cell through narrow tube.}\\ \text{iii. High pressure homogenization}& \text{r. lysozyme treatment.}\\ \text{iv. Chemical disruption}& \text{s. sound.}\end{array}$

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because

The term biodiversity was coined by

Which of the following is correctly matched?

Does our blood have proteases and nucleases?

Briefly give the contributions of the following scientists in formulating the cell theory

(a) Rudolf Virchow

(b) Schleiden and Schwann

Discuss the factors responsible for ascent of xylem sap in plants.

Differentiate between microsporogenesis and megasporogenesis.

What are the cells that make the leaves curl in plants during water stress?

What would happen if number of centrioles will be increased per cell

Natural killer lymphocytes are an example for

Which among the following is not a real difference between a dicot stem and monocot stem regarding their vascular bundles?

A monohybrid cross between heterozygote F1 progeny and its homozygous recessive parent was done. Assuming it to be a mendelian cross, What will be the ratio of different phenotypes in F2 generation?

Gigantism in childhood is caused by:

Which character unified bacteria,BGA,mosses together in the earlier systems of classification

LH is secreted by

Rhizome of ginger is like the roots of other plants that, grows underground. Despite this fact ginger is a stem and not a root. Justify.

Brown hair(B) is dominant to blonde hair (b). If blonds occur in 36% of the population, what is the predicted frequency of homozygous dominant

Is self (fertilization) pollination possible in date palm? Give reasons

Though there are many dissimilarities between the 3 subcategories of bryophytes they are still grouped together based on their similarity in?

Match the level of organization in structure of protein (Column I) with its feature/type of folding (Column II) and functional status (Column III):

In 4 ‘o’clock plants, the crossing of pure-bred red and white flowered parental stocks produced pink flowered plants. This type of genotypic expression is called

Define digestion in one sentence.

I have some fundamental questions. Please answer these

According to cell theory-All cells take birth from pre-existing cells then where did the first cell came from? Also how are new kind of cells formed which lead to advancement and evolution of new race?

The double strand helix structure for DNA was given by:

Match the descriptions with the images a,b,c,d.

A.B.

C. D.

i. Egg and the sperm are injected into the fallopian tubes.

ii. The embryo is transferred to the uterus.

iii. The sperm is directly inserted into the egg and then implanted in the uterus.

iv. The sperm are injected into the uterus.

QUES. Which one of the following is not used in organic farming?

A. Snail

B. Earthworm

C. Glomus

D. Oscillatoria