SPSC Biology 25 years Past Papers

All-in-One Exam Prep Platform

Home
Important MCQs
Past Papers
Subject Wise
All Category

SPSC Biology 25 years Past Papers

Q201: Enlargement of the thyroid gland is called ______?

تائرواڈ گلٹی کی توسیع ______ کہلاتی ہے؟

Grave's disease

Goiter

Hypothyroidism

None of these

Explanation

Goiter is an abnormal enlargement of the thyroid gland.

It often due to iodine deficiency.

It can also result from hormonal imbalances or thyroid disorders.

Q202: Lampreys belong to the vertebrate class ______?

لیمپریوں کا تعلق کشیراتی کلاس ______ سے ہے؟

Cyclostomata

Myxini

Chondrichthyes

None of these

Explanation

Lampreys are jawless fish classified under Cyclostomata.

It is a group of primitive vertebrates.

They have a cartilaginous skeleton.

They are eel-like in appearance.

Q203: Which fruit is a type of true nut?

کون سا پھل ایک قسم کا سچا نٹ ہے؟

Cashew nut

Ground nut

Walnut

None of these

Explanation

A true nut is a dry, indehiscent fruit with a hard shell that does not split open at maturity.

Walnut fits this definition.

While cashew and groundnut are not true nuts.

Q204: Conditions necessary for germination of seed are _____?

بیجوں کے انکرن کے لئے ضروری شرائط _____ ہیں؟

Moisture, O₂, and suitable temperature

CO₂, light, and O₂

Light, O₂, and suitable temperature

None of these

Explanation

Moisture is essential to activate enzymes and initiate metabolic processes in the seed.

Oxygen is required for respiration, and a suitable temperature ensures proper enzymatic activity for growth.

Q205: The term meiosis was coined by ______?

مییوسس کی اصطلاح ______ کے ذریعہ تیار کی گئی تھی؟

Robert Brown

Farmer

Morgan

None of these

Explanation

The term meiosis was coined by J.B. Farmer and J.E.S. Moore in 1905.

Meiosis is a type of cell division that reduces chromosome numbers by half.

It producing gametes in animals and spores in plants.

Q206: A plant in the subdivision Psilopsida has no true ______?

ایک ایسا پودا جس میں سب ڈویژن سیلپسیڈا میں کوئی سچ نہیں ہے؟

Sporophyte

Gametes

Leaves and roots

None of these

Explanation

Plants in Psilopsida (whisk ferns) lack true leaves and roots but have vascular tissue.

They rely on rhizomes for water and nutrient absorption.

Q207: Minerals absorbed by roots move to leaf through _____?

جڑوں سے جذب معدنیات _____ کے ذریعے پتے میں جاتے ہیں؟

Sieve Tube

Xylem

Phloem

None of these

Explanation

Xylem transports water and minerals absorbed by roots to the leaves.

This movement occurs through transpiration pull and capillary action.

Q208: The stems with hollow internodes are known as ______?

کھوکھلی انٹرنڈس والے تنوں کو ______ کے نام سے جانا جاتا ہے؟

Firstular stems

Jointed stems

Cylindrical stems

None of these

Explanation

The stems with hollow internodes are known as jointed stems.

This characteristic is commonly found in plants like bamboo and Equisetum (horsetails).

Q209: Larva of Anopheles mosquito floats in water _____?

انوفیلس مچھر کا لاروا پانی میں تیرتا ہے؟

Vertically with head upwards

Vertically with head downward

Horizontally with tail exposed in air

None of these

Explanation

The Anopheles mosquito larva floats horizontally in water, with its tail exposed to the air for breathing through spiracles.

This is different from Culex mosquito larvae, which hang vertically in water.

Q210: Urinary bladder is present in embryonic _____?

پیشاب مثانے برانن _____ میں موجود ہے؟

Birds

Snakes

Both A & B

None of these

Explanation

Birds develop a urinary bladder during embryonic stages, but it is usually absent in adults.

Snakes lack a urinary bladder entirely, as they excrete nitrogenous waste mainly in solid or semi-solid form.

«1...19 20 21 22 23...44 »

Install App

Install this app on your device for quick access right from your home screen.