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Question 2952

The primary producer in an ecosystem are:

ABacteria

BWomen

CMen

DPlants

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D. PlantsExplanation: In any ecosystem, green plants (and some algae and cyanobacteria) act as primary producers. They convert solar energy into chemical energy through the process of photosynthesis, producing glucose and oxygen. This stored energy becomes the foundation of all food chains, supporting consumers and decomposers. Thus, plants form the first trophic level in an

Question 2951

Nitrogen is an essential constituent of all:

ACarbohydrates

BFats

CProteins

DVitamins

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C. ProteinsExplanation: Proteins are complex organic compounds composed of smaller units called amino acids. Each amino acid contains an amino group (–NH₂), which contributes nitrogen to the molecular structure. This makes nitrogen an essential element in all proteins. Carbohydrates and fats lack nitrogen, while only some vitamins contain it.

Question 2950

Who discovered electromagnetic nature of light?

AYoung

BSnell

CNewton

DMaxwell

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D. MaxwellExplanation not yet available.

Question 2949

Persistence of vision is the principle behind:

ACamera

BBinocular

CCinema

DPeriscope

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C. CinemaExplanation not yet available.

Question 2948

Malaria is transmitted from one person to another by:

AAedes Mosquito

BCulex Mosquito

CAnopheles Mosquito

DAll of the above

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C. Anopheles MosquitoExplanation: Malaria is caused by the protozoan parasite Plasmodium (species such as *P. vivax*, *P. falciparum*, *P. malariae*, and *P. ovale*). It spreads through the bite of an infected female Anopheles mosquito. The mosquito injects sporozoites (infective stage of *Plasmodium*) into the human bloodstream. These parasites infect liver cells, multiply, and later invade red blood cells, causing symptoms like fever, chills, and

Question 2947

Cuscuta is a :

AParasite

BSaprophyte

CEpiphyte

DXerophyte

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A. ParasiteExplanation: Cuscuta, commonly known as dodder plant or amarbel, is a total stem parasite. It lacks chlorophyll and cannot perform photosynthesis. Instead, it attaches itself to the host plant using specialized structures called haustoria that penetrate the host’s vascular tissues to absorb nutrients and water. Cuscuta is usually seen twining around host plants such as lucerne, hedg

Question 2946

Which one of the following hormone is called "Emergency Hormone"?

AInsulin

BAdrenaline

CThyroxine

DVasopressin

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B. AdrenalineExplanation: Adrenaline (also known as epinephrine) is secreted by the adrenal medulla in response to stress, fear, anger, or excitement. It prepares the body for “fight or flight” by increasing heart rate, blood pressure, and glucose levels, and by dilating the air passages to supply more oxygen. Because it helps the body respond instantly to emergencies, it is called the “emergency hormone.”

Question 2945

The study of population is called:

ABiography

BCartography

CAnthropology

DDemography

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D. DemographyExplanation not yet available.

Question 2944

The layer of the atmosphere in which Radio Waves are reflected back is called:

AExosphere

BIonosphere

CTroposphere

DStratosphere

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B. IonosphereExplanation not yet available.

Question 2943

Who founded the Indian National Party in Berlin during 1914?

AChampakaraman Pillai

BSubhash Chandra Bose

CW.C. Banerjee

DLala hardayal

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A. Champakaraman PillaiExplanation: The Indian National Party in Berlin was founded in 1914 by Champakaraman Pillai. He was an Indian revolutionary who worked in Germany to mobilize international support for India’s independence during World War I. The party collaborated with other expatriate revolutionaries to challenge British rule from abroad.

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Explore the question bank

The primary producer in an ecosystem are:

Nitrogen is an essential constituent of all:

Who discovered electromagnetic nature of light?

Persistence of vision is the principle behind:

Malaria is transmitted from one person to another by:

Cuscuta is a :

Which one of the following hormone is called "Emergency Hormone"?

The study of population is called:

The layer of the atmosphere in which Radio Waves are reflected back is called:

Who founded the Indian National Party in Berlin during 1914?

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