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Which of the following chemicals cause changes leading to the

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Which of the following chemicals cause changes leading to the vasodilation? Select all that apply.

Granzyme
Perforin
Kinins
Complement system
Leukotriene
Histamine

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Question 1

Easy

Which of the following statements are correct?
(i) Genus comprises a group of related species.
(ii) Taxon represents a taxonomic group of individual organisms.
(iii) Family comprises a group of related genera.
(iv) Taxonomic category class includes related orders.

(i), (ii), and (iv)
(ii) and (iv)
(i), (iii) and (iv)
(ii), (iii) and (iv)

Topic:

The Living World

Book:

Xtract Objective Biology for NEET (Disha)

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Question 2

Medium

From the options given below, find out the correct floral formula for a flower having the following characters namely actinomorphic, bisexual, five united sepals, five united petals, stamens five and epipetalous, bicarpellary, syncarpous with superior ovary :

$\oplus ⚥ K_{(5)} \underline{C}_{(5)} \underline{A_{5}} \underline{G}_{(2)}$
$\oplus ⚥ K_{(5)} C_{(5)} A_{(5)} \underline{G}_{(2)}$
$\oplus ⚥ K_{(5)} \underline{C_{(5)}} A_{(5)} \underline{G}_{(2)}$
$\oplus ⚥ K_{(5)} C_{(5)} A_{(5)} G_{(2)}$

Topic:

Morphology of Flowering Plants

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Question 3

Easy

At maturity, which of the following is nonnucleated-

Sieve cell
Companion cell
Palisade cell
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Topic:

Anatomy of Flowering Plants

Book:

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Question 4

Easy

Which one of the following pairs of animal comprises ‘jawless fishes’?

Lampreys and eels
Mackerals and rohu
Lampreys and hag fishes
Guppies and hag fishes

Topic:

Animal Kingdom

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Generally speaking, identify the overall structure of the cell membrane?

Topic:

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Question 2

Which statement best describes the logic of the process of science?a. If I generate a testable hypothesis, experiments and observations will support it.b. If my prediction is correct, it will lead to a testable hypothesis.c. If my observations are accurate, they will support my hypothesis.d. Test results may or may not support my hypothesis.

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Question 3

A variety of opium poppy (Papaver somniferum) with lacerate leaves was crossed with a variety that has normal leaves. All the

F_{1}

had lacerate leaves. Two

F_{1}

plants were interbred to produce the

F_{2} .

Of the

F_{2}, 249

had lacerate leaves and 16 had normal leaves. Give genotypes for all the plants in the

P, F_{1},

and

F_{2}

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Topic:

Biology

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Question 4

T-)You discovered a mutation in the gene LRP4 that causes abnormal limb development in mice when homozygous. You cross two mice, both heterozygous for this mutation, to produce multiple litters and get the following live offspring: 51 mice with normal limbs and 9 mice with abnormal limbs. This result is surprising to you: you expected to see more mice with abnormal limbs. You suspect that some of the embryos with abnormal limbs are dying in utero (perhaps due to other abnormalities) and are not being born. a. Which null hypothesis can you use to analyze these data: #1 only, #2 only, both or neither? Explain your choice. (5 marks) Null hypothesis #1: Alleles of LRP4 follow simple Mendelian inheritance, so there should be a 3:1 ratio of normal to abnormal progeny (Aa x Aa = 3 AA : 1 aa). Null hypothesis #2: Some of the embryos with abnormal limbs are dying in utero and are not being born. b. Show your work to determine if the null hypotheses are supported or not.

Topic:

Biology

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Question Text	Which of the following chemicals cause changes leading to the vasodilation? Select all that apply.
Topic	All topics
Subject	Biology
Class	Class 11

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