MCQ
Select the correct option w.r.t. Age pyramids.
- ✓$a$ - Expanding, $b$ - stable, $c$ - Declining
- B$a$ - stable, $b$ - Expanding, $c$ - Declining
- C$a$ - stable, $b$ - Declining, $c$ - Expanding
- D$a$ - Declining, $b$ - stable, $c$ - Expanding
✓
Answer
Correct option: A.
$a$ - Expanding, $b$ - stable, $c$ - Declining
a
The first graph represents a narrow top and wide base. Thus, it is considered to be expanding. The second graph represents similar width from top to bottom. Thus, it is considered to be stable. The third graph is considered to be declining because it has a wider top and narrow base.
The first graph represents a narrow top and wide base. Thus, it is considered to be expanding. The second graph represents similar width from top to bottom. Thus, it is considered to be stable. The third graph is considered to be declining because it has a wider top and narrow base.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$A$- In conifers, leaves reduce the surface area.
→$R$- Conifers have needle like leaves.
Enzymes that catalyse removal of groups from substrates by mechanism other than hydrolysis leaving double bonds.
What are the characteristics of the cells present in the root apex and shoot apex ?
→$a.$ Constantly dividing cells.
$b.$ Cell walls are primary in nature.
$c.$ New cell wall deposition.
$d.$ Increased vacuolation.
$e.$ Possess large conspicuous nuclei.
Spores of Dryopteris are
$A$ - The salt concentration is less than $5$ (parts per thousand) in inland waters.
→$R$ - The salt concentration is $45 -50$ (parts per thousand) in the sea.
Identify $A, B$ and $C$ in the given diagram of shoot apical meristem
→Read carefully the following statements
→$I.$ Funaria possesses unicellular and unbranched rhizoids
$II.$ Gemmae are asexual buds, which originate from small receptacles called gemma cups
$III.$ The Sphagnum plants have magnificent property of retaining water
$IV.$ Mosses along with lichens are the first organisms to colonise rocks
Which of the statements given above are correct?
Ginger is a stem which can be differentiated from root because it
Sleep movements of leaves in certain plants are or photonasty is due to
One pollen mother cell may produce four germinating pollen grains, each with two male nuclei and one tube nucleus. How many meiotic divisions are necessary to bring this about