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Answer the following:

(a) Which part of the ear determines the pitch of a sound?

(b) Which part of the human brain is the most developed?

(c) Which part of our central neural system acts as a master clock?

Formation of both peptide bonds and glycosidic bonds
(A) involve addition of a phosphate group to the precursor molecules.
(B) would not require a catalyst in biological systems.
(C) involve removal of a water molecule.
(D) involve addition of carboxyl group.

Which of the following is a male hormone?

When about 1500 ml of air remains in the lungs after forceful expiration, it is called the _________.

Assertion (A): The deficiency symptoms of N, P and Mg are visible first in senescent leaves.
Reason (R): Elements like N, P and Mg are mobile.

Name the artery that carries deoxygenated blood from the heart to the lungs?

Cardiac muscle is similar to smooth muscle in that both

Which of these is a characteristic of phycomycetes but not of zygomycetes?

Which is simple dead mechanical tissue?

Mendel’s typical dihybrid cross is

The external appendage-like structure put out by amoebae for ingestion is called as

Calcium is an essential plant nutrient because it is a component of

If a dwarf pea plant was treated with Gibberellic acid, it grows as tall as the pure tall plant. If the treated plant is crossed with a pure tall pea plant then the phenotypic ratio is likely to be:

Which of these do fungi use, to reproduce?

What are the various routes by which transmission of human immunodeficiency virus takes place ?

Match the column

$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ \left(I\right)& \text{Arsenic}& \left(P\right)& \text{Minamata}\\ \left(II\right)& \text{Nitrate}& \left(Q\right)& \text{Itai-Itai}\\ \left(III\right)& \text{Mercury}& \left(R\right)& \text{Blue baby syndrome}\\ \left(IV\right)& \text{Cadmium}& \left(S\right)& \text{Skeletal fluorosis}\\ \left(V\right)& \text{Fluoride}& \left(T\right)& \text{Black foot disease}\end{array}$

Venation is the term used to describe the pattern of arrangement of

Given here are figures of a few folded sheets and designs drawn about the fold. In each case, draw a rough diagram of the complete figure that would be seen when the design is cut off

Which of the following is true regarding background extinction?

परशुराम ने अपने विषय में सभा में क्या-क्या कहा, निम्न पद्यांश के आधार पर लिखिए -

बाल ब्रह्मचारी अति कोही। बिस्वबिदित क्षत्रियकुल द्रोही||

भुजबल भूमि भूप बिनु कीन्ही। बिपुल बार महिदेवन्ह दीन्ही||

सहसबाहुभुज छेदनिहारा। परसु बिलोकु महीपकुमारा||

मातु पितहि जनि सोचबस करसि महीसकिसोर।

गर्भन्ह के अर्भक दलन परसु मोर अति घोर||

A dorsiventral leaf has:

Vomit centre in the brain is present in

A heavily bleeding and bruised road accident victim was brought to a nursing home. The doctor immediately gave him an injection to protect him against a deadly disease.

1. Write what did the doctor inject into the patient’s body.
2. How do you think this injection would protect the patient against the disease?
3. Name the disease against which this injection was given and the kind of immunity it provides.

नसीरूद्दीन की बात सुनकर जमाल साहब पर तो मानो घड़ों पानी पड़ गया।

(क) घड़ों पानी पड़ना एक मुहावरा है। इसका क्या मतलब हो सकता है? पता लगाओ। तुम इसका मतलब पता करने के लिए अपने साथियों या बड़ों से बातचीत कर सकते हो या शब्दकोश देख सकते हो।

(ख) इस मुहावरे को सुनकर मन में एक चित्र सा बनता है। तुम भी किन्हीं दो मुहावरों के बारे में चित्र बनाओ। कुछ मुहावरे हम दे देते हैं। तुम चाहो तो इनमें से कोई पसंद कर सकते हो–

• सिर मुंडाते ही ओले पड़ना

• ऊँट के मुँह में जीरा

• दीया तले अँधेरा

• ईद का चाँद

Ribs move upwards and outwards when we-

Draw diagrams of a typical monocot an dicot leaves to show their venation pattern.

A virus is considered as a living organism and an obligate parasite when inside a host cell. But virus is not classified along with bacteria or fungi. What are the characters of virus that are similar to non-living objects?

Which of the following pairs are correctly matched?

(A) Poikilosmotic – Animals show osmotic changes with respect to the environment.

(B) Homoiosmotic – Animals maintain body fluid concentrations constant irrespective of fluctuations in the

environmental concentrations.

(C) Euryhaline – Animals withstand aquatic media of wide range of salt concentrations.

(D) Stenohaline – Animals survive with a wide range of salinities

The lowest level of organisation among Kingdom Animalia is