Biology — Plants, Photosynthesis, Reproduction

Question 1

Photosynthesis takes place in:‌​‍

Accepted Answer

Chloroplast — Chloroplasts contain chlorophyll that absorbs sunlight for photosynthesis.‌​‍

Answer

Mitochondria

Answer

Nucleus

Answer

Ribosome

Question 2

The green pigment in plants is:‌​‍

Accepted Answer

Chlorophyll — Chlorophyll absorbs sunlight (mainly red and blue) and reflects green — making plants look green.‌​‍

Answer

Haemoglobin

Answer

Melanin

Answer

Carotene

Question 3

The gas released during photosynthesis is:‌​‍

Accepted Answer

Oxygen — 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. Plants release oxygen as a byproduct.‌​‍

Answer

Carbon Dioxide

Answer

Nitrogen

Answer

Hydrogen

Question 4

The part of the plant that absorbs water from soil is:‌​‍

Accepted Answer

Root — Root hairs absorb water and minerals from the soil through osmosis.‌​‍

Answer

Stem

Answer

Leaf

Answer

Flower

Question 5

Pollination is:‌​‍

Accepted Answer

Transfer of pollen to stigma — Pollination = transfer of pollen grains from anther to stigma. ‌​‍Done by wind, insects, birds, water.

Answer

Seed dispersal

Answer

Germination of seeds

Answer

Absorption of water

Question 6

The process of water loss from leaves is:‌​‍

Accepted Answer

Transpiration — Transpiration = loss of water vapour through stomata in leaves. ‌​‍Creates suction for water uptake.

Answer

Respiration

Answer

Photosynthesis

Answer

Osmosis

Question 7

Stomata are found on:‌​‍

Accepted Answer

Leaves — Stomata are tiny pores on leaf surfaces that allow gas exchange (CO₂ in, O₂ out) and transpiration.‌​‍

Answer

Roots

Answer

Stem

Answer

Flowers

Question 8

The male reproductive part of a flower is:‌​‍

Accepted Answer

Stamen — Stamen (anther + filament) is the male part. ‌​‍Pistil (stigma + style + ovary) is the female part.

Answer

Pistil

Answer

Petal

Answer

Sepal

Question 9

Seeds are formed from:‌​‍

Accepted Answer

Ovules — After fertilisation, ovules develop into seeds and the ovary develops into fruit.‌​‍

Answer

Petals

Answer

Sepals

Answer

Anthers

Question 10

Nitrogen fixation is done by:‌​‍

Accepted Answer

Rhizobium bacteria — Rhizobium bacteria in root nodules of leguminous plants fix atmospheric nitrogen into usable form.‌​‍

Answer

All plants

Answer

Animals

Answer

Fungi only

Question 11

The powerhouse of the cell is:‌​‍

Accepted Answer

Mitochondria — Mitochondria perform cellular respiration, producing ATP (energy) — hence 'powerhouse of the cell'.‌​‍

Answer

Nucleus

Answer

Chloroplast

Answer

Ribosome

Question 12

Cell wall is found in:‌​‍

Accepted Answer

Plant cells only — Plant cells have a rigid cell wall (made of cellulose) outside the cell membrane. ‌​‍Animal cells don't.

Answer

Animal cells only

Answer

Both

Answer

Neither

Question 13

The basic unit of classification is:‌​‍

Accepted Answer

Species — Species is the basic unit of biological classification. ‌​‍Hierarchy: Kingdom > Phylum > Class > Order > Family > Genus > Species.

Answer

Kingdom

Answer

Genus

Answer

Family

Question 14

Mushrooms belong to:‌​‍

Accepted Answer

Fungi — Mushrooms are fungi — they are neither plants nor animals. ‌​‍They decompose organic matter.

Answer

Plants

Answer

Animals

Answer

Bacteria

Question 15

Amoeba reproduces by:‌​‍

Accepted Answer

Binary fission — Amoeba reproduces asexually by binary fission — splitting into two daughter cells.‌​‍

Answer

Budding

Answer

Fragmentation

Answer

Spore formation

Biology — Plants, Photosynthesis, Reproduction