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Name any three diseases that are transmitted by direct contact.

The rate of transpiration will be very less in a situation where

The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gamete produced by the plant ?

(a) 56 (b) 28 (c) 14 (d) 4

A)What is genus?(1mark)

B)What is species?(1mark)

Oxygen is carried by

कुछ खेल कुछ खास जगहों में ही खेले जा सकते हैं और कुछ खेल प्रचलन के कारण कुछ खास लोगों द्वारा ही खास स्थानों पर खेले जाते हैं। बताओ कि–

(क) कौन-से खेल अंदर खेले जाते हैं?

(ख) कौन-से खेल बाहर खेले जाते हैं?

(ग) कौन-से खेल अकेले खेले जाते हैं?

The movement of stem against gravity is called__________.

Exceptionally talented people are born so; talent cannot be cultivated.

When we blow exhaled air into the solution of lime water, it turns milky. What actually happens in the solution?

The 'speckles'
refer
to:

i.
a pink object

ii.
the opposite wall which has spots on it

iii.
a person with pink pimples

iv.
pink spots in general

Which of the following response is not evoked by adrenaline?

The energy produced during respiration is stored in __.

______ contains 40 different enzymes that help in destroying foreign substances.

Nervous System consists of:

i. Brain

ii. Spinal cord

iii. Stomach

iv. Nerves

v. Spleen

What is a biological preparation that provides active acquired immunity to a particular disease?

Select the right match of endocrine gland and their hormones among the options given below

$\begin{array}{cc}ColumnI& ColumnII\\ A.Pineal& 1.Epinephrine\\ B.Tryroid& 2.Melatonin\\ C.Ovary& 3.Estrogen\\ D.Adrenalmedulla& 4.Tetraiodothyronine\end{array}$

Codes

A B C D

(a) 4 2 1 3

(b) 2 4 1 3

(c) 3 2 1 4

(d) 2 4 3 1

Mention 3 reasons for adopting contraceptive methods? [3 MARKS]

The functional segments of DNA are called ___ .

Given below is a set of four terms. In this set, one term is odd and cannot be grouped into the category to which the other three belong. Identify the odd one.

ADH, TSH, NADP, ACTH

Addition of which accessory gland secretion turns the sluggish sperms active?

Structural and functional units of testes are

The product of anaerobic respiration of yeasts is _______.

(a) Define phototropism. Give one example of phototropism.

(b) How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.

(c) What is meant by positive phototropism and negative phototropism ? Give one example of each type.

A variety of pea plant with round yellow seeds and violet flowers (AABBCC) was crossed with a plant having wrinkled green seeds and white flowers (aabbcc). The frequency of plants with genotype AaBbCc in the $F_2$ generation would be

During the downpour in a village, the rain water carried away excess away excess of nitrogenous and other compounds present in the soil to a pond. How will they affect the growth of algale and phytoplankton in the pond ?

Match the following:

$\begin{array}{cc}\text{A}& \text{B}\\ \text{(1) Growth of sunflower towards a light source}& \text{(i) Chemotropism}\\ \text{(2) Growth of tree roots towards earth}& \text{(ii) Hydrotropism}\\ \text{(3) Growth of plant roots towards or away from moisture}& \text{(iii) Phototropism}\\ \text{(4) Growth of a plant part in response to a chemical stimulus}& \text{(iv) Geotropism}\end{array}$​

If the first batch code of a day is ‘font gave it clean to mark’, which of the following will be the code of fourth batch?