Tag: pictorial feature of plant kingdom

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Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

The giant redwoods of California are the tallest plants reaching a height of 110 m. But which are the longest plants in the world?

  1. Liane

  2. Ressurrection plant

  3. Sorrel

  4. Rattan Palm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rattan belongs to the palm family (Arecales or Palmea) and is found from sea level up to 3,000 m. Around 600 species and 13 genera of rattan are known. Although most rattan species are native to the tropical regions of Africa, Asia, and Australia, there is a large variety in their distribution.  Commercially-used rattan usually grows in hilly tropical areas, with a mean annual temperature of 25° C and an annual rainfall of -2,000 mm. As a result, the main area for rattan production is in the tropical regions of South and Southeast Asia. There are different types of rattan palms, such as high or low climbers, single stemmed or clustered rattan species. Some have very short and underground stems. Several rattan species are known to reach lengths of 100m. Rattan sheaths have spines for protection, along with ‘whips’ that are also covered with spines. These play a major role in supporting the rattan as it grows over trees and other plants in the rainforest. 

So the correct option is 'Rattan Palm'.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Vessels are found in

  1. All pteridophytes

  2. All angiosperms

  3. Some gymnosperms

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vessels are one of the type of water conducting tissue. These cells are long, cylindrical, dead cells. Vessels are absent in pteridophytes. These cells are present in all angiosperms and some gymnosperms. 

Therefore, the correct answer is option D.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Which of the following statements is not true about the life cycle of flowering plants.?

  1. Sporophyte is diploid

  2. Sporophyte produces heterospores

  3. Megagametophyte is the seed

  4. Megagametophyte is the embryo sac
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Megagametophyte develops from megaspore. The megaspore enlarges into an oval-shaped structure called the embryo sac, which is termed as megagametophyte.

Thus the correct answer is 'Megagametophyte is the seed'.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Which of the following statements is true about bryophytes?

  1. The sporophyte is dependent on gametophyte for support, shelter and nutrition

  2. The sporophyte is haploid

  3. The gametophyte is diploid

  4. The gametophyte is dependent on sporophyte for support, shelte and nutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes are gametophyte dominant, meaning that the more prominent, longer-lived plant is the haploid gametophyte. The diploid sporophytes appear only occasionally and remain attached to and nutritionally dependent on the gametophyte.

So, the correct answer is A. (The sporophyte is dependent on gametophyte for support,shelter and nutrition)

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Moss plants develop from

  1. Oospores

  2. Protonema

  3. Antherozoids

  4. Diploid spores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the life cycle of mosses, haploid spores germinate to produce a filamentous, creeping, green, and branched structure called a protonema. The leafy gametophyte, which represents the mature moss plant, then develops as a lateral bud from this protonema stage.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Largest moss is

  1. Pogonatum

  2. Funaria

  3. Dawsonia

  4. Polytrichum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dawsonia is a genus of acrocarpous mosses that includes the tallest and largest self-supporting mosses in the world. Specifically, Dawsonia superba can grow up to 50 to 60 cm in height, which is exceptionally large for a bryophyte. Other genera like Funaria and Pogonatum are much smaller.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

Sex organs of Anthoceros are

  1. Terminal

  2. Borne over dorsal surface of thallus

  3. Embedded

  4. Formed over gametophores
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the hornwort Anthoceros, the sex organs (antheridia and archegonia) are deeply embedded within the dorsal tissue of the gametophytic thallus. They develop from hypodermal cells and do not project outward on stalks or specialized gametophores, unlike in many liverworts.

Multiple choice botany pictorial feature of plant kingdom classification of bryophytes types of bryophytes bryophyta

In mosses gametophyte has $2$ stages. What are these stages?

  1. $1st$ stage is sporogonium phase and $2nd$ protonema stage
  2. $1st$ stage is protonema and the $2nd$ stage is leafy stage
  3. $1st$ stage is gemmae formation and $2nd$ one is meiosis.
  4. $1st$ stage is zygote and $2nd$ one is Spore mother cell
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In mosses, the gametophyte generation develops in two stages: the first stage is the creeping, filamentous protonema, and the second stage is the upright, leafy gametophore stage that develops from buds.