Botany MCQs - Everyday Science Practice | PakExamPoint
Practise Botany MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Botany MCQs and revision practice
Study Botany through multiple-choice questions in Everyday Science. This subtopic contains 333 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Botany MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
فائٹولیکسین اینٹی فنگل یا فنگسٹٹک مادوں کی طرح ہیں جو میزبان کے ذریعہ انفیکشن کے بعد دفاعی اقدام کے طور پر تیار ہوتے ہیں اور عام طور پر ______ ہوتے ہیں؟
A. None of these
B. Phenolic compounds
C. Lipids
D. Proteins
Check answer and explanation
Answer: Phenolic compounds
Explanation Phytoalexins are antimicrobial compounds synthesized by plants in response to pathogen attacks, primarily consisting of phenolic compounds. These compounds help restrict pathogen growth and prevent further infection.
سائکاس کے بارے میں درج ذیل میں سے کون سا بیان غلط ہے؟
A. Cycas have vessel elements in their xylem.
B. Cycas plants are gymnosperms.
C. Cycas leaves are pinnately compound.
D. Cycas produce seeds but do not form flowers.
Check answer and explanation
Answer: Cycas have vessel elements in their xylem.
Explanation The statement that Cycas have vessel elements in their xylem is incorrect. Cycas, like other gymnosperms, do not have vessel elements; instead, they have tracheids for water conduction. Vessel elements are a characteristic of angiosperms (flowering plants). Cycas are gymnosperms and produce seeds, but they do not form flowers, and their leaves are typically pinnately compound.
فطرت میں نامیاتی مادے کے بنیادی پروڈیوسر _____ ہیں؟
A. Human beings
B. Green plants
C. Bacteria
D. None of these
Check answer and explanation
Answer: Green plants
Explanation Green plants are primary producers because they convert sunlight into organic matter through photosynthesis . They form the base of the food chain . It producing oxygen and energy-rich compounds essential for life.
Explanation Poaceae and Asteraceae are plant families. While Capitulum head is an inflorescence type. Since the first two are taxonomic groups and the third is a floral structure . Capitulum head is the odd one out.
Explanation Transpiration is ultimately the main driver of water movement in xylem, combined with the effects of capillary action. The cohesion-tension model works like this: Transpiration (evaporation) occurs because stomata in the leaves are open to allow gas exchange for photosynthesis.
جیوٹروپزم _____ کے جواب میں پودوں کی اشنکٹبندیی تحریک ہے؟
A. Water
B. Gravity
C. Light
D. None of these
Check answer and explanation
Answer: Gravity
Explanation Geotropism is the growth response of plants toward or away from gravity . Roots show positive geotropism (grow downward) and shoots show negative geotropism (grow upward).
Explanation The main biopolymers that comprise a fungal cell wall are chitin and glucans, Chitin provides a strong structural network through N-acetylglucosamine units Glucans (glucose polymers) cross-link to further strengthen the wall. Other components, such as mannoproteins, are also present in the outer layer, contributing to the wall's integrity and function.
Explanation The central metal atom in chlorophyll is Magnesium . Chlorophyll, the green pigment in plants, has a magnesium atom at its core, which is crucial for its function in photosynthesis.
Explanation Psilotum is called a whisk fern . Because it lacks true leaves and roots , resembling early vascular plants. It belongs to the division Psilotophyta and reproduces through spores .
Explanation The prothallus of Nephrolepis (a type of fern) is haploid. The prothallus is haploid, since it grew from a spore which had been formed by meiosis. It does not have any vascular tissue and uses small rhizoids to anchor it to the ground. On the underside of the prothallus the sex organs form.
Found a mistake? Use “Report correction” in the practice tool or contact us with the question and a supporting source.