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Semiconservative mode of replication of DNA was proved by

Justify the following statements on the basis of external features:

(i) Underground parts of a plant are not always roots

(ii) Flower is a modified shoot

The size of a standard herbarium sheet is

Photorespiration is a characteristic feature of plants with

Advantages of selecting drosophila as an experimental organisms in genetics

In which one of the following pair the two items mean one and the same thing?

Choose the incorrect match:

Which among the following is/are residential birds of India?

Codes :

Question 42
Write briefly the significance of mitosis and meiosis in multicellular organism.

Chemicals of low molecular masses (~100u–500u) and which interact with macromolecular targets and produce a biological response are known as:

Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?

IUDs work as contraceptive device as they

The first atomic bomb was dropped on

Match the names of plant hormones mentioned under column I, with the physiological effects listed under column II. Choose the answer which gives the correct combinations of the alphabets

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ & \text{Plant Hormones}& & \text{Physiological Effect}\\ A& \text{Gibberellin}& e& \text{Cell division}\\ B& \text{Auxin}& f& \text{Internodal elongation}\\ C& \text{Kinetin}& g& \text{Ripening of fruits}\\ D& \text{Ethylene}& h& \text{Abscission}\\ & & i& \text{Apical dominance}\end{array}$

Glomerular capsule and Convoluted tubules always lie within the _______.

Define and understand the following terms:

(i) Phylum

(ii) Class

(iii) Family

(iv) Order

(v) Genus

Choose the incorrect pair:

Heartwood helps in

• Mitochondira contain ribosomes . Where these ribosomes are synthesized in nucleolus or mitochondria itself

Is pre mRNA the same as hnRNA?

Question 22
Does moonlight support photosynthesis? Find out.

Fill in the blanks with a suitable conjunction.

………... he was ill, he went to college.

Read the following four statements (i) – (iv) with certain mistakes in two of them.
(i) Adipose tissue is a type of dense connective tissue located beneath the skin.

(ii) In each body segment of earthworm except the first, fifth and clitellum there are rows of S-shaped setae, embedded in the epidermal pits in the middle of each segment.

(iii) Most of the cartilages in vertebrate embroys are replaced by bones in adults.

(iv) Smooth muscles are ‘involuntary’ as their functioning cannot be directly controlled.

Which of the above statements have mistakes?

Match the lists and find the correct option

$\begin{array}{cc}\text{I}& \text{II}\\ \text{(a) Colony hybridisation}& \text{1. Transfer of recombinant DNA into host cell}\\ \text{(b) Gel electrophoresis}& \text{2. Selection of cells containing the desired gene}\\ \text{(c) Gradient centrifugation}& \text{3. Separation of DNA fragments}\\ \text{(d) Polymerase chain reaction}& \text{4. Purification of DNA}\\ & \text{5. Gene cloning in thermocycler}\end{array}$

All the bscteria have the following organelle a.Mesosome b. Chloroplast c.golgi bodies d. Mitochondria

The NCERT defines living organisms as self replicating , evolving , self regulating interactive systems capable of responding to external stimuli. However , patients in coma who cannot respond to external stimuli are living . How is this definition justified?

What is need of having endosperm layers in fruit

I want list of Latin names with Morden names with genus and species. ( Five Kingdom Classification)

Examples of different types of tropisms

^{List out the characteristics that contribute to the success of reptiles on land​​​​​​}

State the different modes of $C{O}_2$ transport in blood.

Which of these groups vary from amino acid to another?

The arrangement of ovules within the ovary is known as placentation. What does the term placenta refer to? Draw various types of placentations in the flower as seen in TS and VS.

Fungi are cosmopolitan, write the role of fungi in your daily life.

Discuss the role of fungi, with respect to its economic importance to humans.

The number of amino acids in insulin molecule:

Choose the correct statement from among the following:

Identify the set of natural auxins (A) and synthetic auxins (B) from the following.

1. 2,4 - B

2 .NAA

3. 4-chloro AA

4.PAA

5.2,4,5-T

6. IBA

7. IAA