Plant Kingdom Test - 42

Gymnosperms are seed-bearing plants where seeds are naked and are not enclosed by the ovary.

• The cryptogams are a group of plants that do not produce seeds. This group contains algae, bryophytes, and pteridophytes. These are spore-producing plants. 
• Pteridophytes are vascular plants which means that these plants have xylem and phloem. These tissues are together known as vascular bundles. 

A filter is used to filter bacteria is called as a bacteriological filter. Cosmarium is also called as a bacteriological filter because its plasma membrane is porous and which filters the small organism like bacteria. Thus, the correct answer is option D.

Bryophytes are called as amphibians of plant kingdom because even though they mostly grow on land, they require water for fertilizaton. Hence they usually grow near water. Thus the correct option is A.

Irish moss is a species of red algae that grows in cold water and used in food recipes. Club moss is the seedless vascular plant. Reindeer moss is a type of lichen found in the Arctic land. Whereas Bog moss is also called as peat moss and belongs to Bryophyta and follows key characteristics of the mosses such as alternation of generation and stores water due to the presence of cuticles. Thus, the correct answer is option B.

• A sporophyte is the diploid multicellular stage in the life cycle of a plant or alga. It develops from the zygote produced when a haploid sperm cell is fertilized a haploid egg, and each sporophyte cell, therefore, has a double set of chromosomes, one set from each parent. 
• All vascular plant, and most multicellular algae, have life cycles in which a multicellular diploid sporophyte phase alternates with a multicellular haploid gametophyte phase.

The gametophyte generation is also called a sexual phase. Here the haploid gametes are produced from the mother cell. Gametes have a single set of chromosomes, which gradually combine with another haploid gamete to give rise to a diploid cell.

The correct answer is B.

Spirulina is a type of cyanobacteria or blue-green algae, which is grown in both salt and freshwater. Human urine acts as liquid fertilizer, rich in nitrogen, in spirulina culture. IT is decomposed by spirulina very well in diluted form.

The correct answer is A.