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Question

Which one of the following four plant families has the largest number of species?

The correct answer is

Rosaceae

Comparing Plant Families by Species Count

The question asks us to identify which among the four listed plant families contains the largest number of species. To answer this, we need to consider the approximate number of known species within each family.

Let's look at the families provided and their estimated species counts:

Plant Family Approximate Number of Species
Brassicaceae Around 3,000 to 4,000 species
Cucurbitaceae Around 900 to 1,000 species
Cactaceae Around 1,500 to 2,000 species
Rosaceae Around 4,000 to 4,800 species

Rosaceae: Largest Species Number

Comparing the approximate numbers, we can see:

  • Brassicaceae has a significant number of species, roughly in the range of 3,000-4,000.
  • Cucurbitaceae is considerably smaller, with around 900-1,000 species.
  • Cactaceae has more species than Cucurbitaceae but fewer than Brassicaceae, estimated around 1,500-2,000.
  • Rosaceae shows the highest estimated number of species among the four families, ranging from approximately 4,000 to 4,800.

Based on these estimates, the Rosaceae family has the largest number of species when compared to Brassicaceae, Cucurbitaceae, and Cactaceae.

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Important Questions from Diversity of Life Forms

  1. Which one of the following fossils is no longer considered to be a true vascular plant based on the structure of the secondary thickening of the conducting elements?

  2. Select the correct former name for The International Code of Nomenclature (ICN) which was changed as part of the Melbourne code.

  3. Based on the reported estimates of biodiversity in India, select the correct option that represents the decreasing order of total number of species reported in these taxa.

  4. Select the rare or endangered species which also have exceptionally low genetic variability, as documented by multi-locus molecular methods.

  5. Given below are the list of some of the most rare species on our planet (Column X) and the regions of the world where they occur (Column Y).

    Column X

    Name of the organism

    Column Y 

    Region of occurrence

    A.

    Saola

    i.

    Tianshan mountains

    B.

    Ili Pika

    ii.

    Vietnam

    C.

    Greater Bamboo Lemur

    iii.

    Sahara Desert

    D.

    Addax

    iv.

    Madagascar

    Which one of the following options represents all correct matches between Column X and Column Y? 

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