CBSE Questions for Class 11 Medical Biology Plant Kingdom Quiz 6 - MCQExams.com

• Transfusion tissue is composed of three types of cells tracheids, parenchyma and albuminous cells.
• Transfusion tissue is a specialized tissue present on either side of midrib in between the palisade and spongy tissues of the leaf of gymnosperms.
  
• These are the conducting tissues in leaves of Pinus & Cycas for both water and food.
• So, the correct answer is option D.

• The life cycle of Pteridophytes is dominated by the sporophyte (sexual) stage of the alternation of generations. 
• Sporophyte plant produces haploid spores after meiosis that germinate to produce a thallus-like gametophyte plant body i.e prothallus.
• Gametophyte plant body is responsible for formation of male and female gametes through mitosis only.
• These haploid gametes fuse to form diploid zygote that divides and differentiate to produce sporophyte plant body.

The classification of algae on the basis of pigmentation is given by Fritsch. The specialised plastids called chromophores are present in algae where pigments are found. Almost the major groups of algae have at least one characteristic pigment in it.

The correct answer is D.

• Gymnosperms bear naked seeds not enclosed in a fruit.
• Pteridophytes do not have flowers or seeds and have tiny spores which get scattered to form new plants.
• Bryophytes are the amphibians of the plant group, which although grows on land but need water for reproduction.

The red algae (Rhodophyta) contains phycoerythrin which reflects red light and absorbs blue light, but the pigment which is mainly responsible for photosynthesis in red algae is Chlorophyll A.

The correct Answer is B.

• The seeds of Angiosperms are covered by fruits and not naked.
• They have well developed vascular tissue.
• They do not fall under Cryptogams. They are Phanerogams.

Chlorophyceae are a type of red algae which are green in colour due to the presence of chlorophyll a, chlorophyll b and beta carotene.  Similarly higher plants also possess green colour due to the presence of chlorophyll.

The correct answer is B.

•     Protein: 4 grams.
•     Vitamin B1 (Thiamin): 11% of the RDA.
•     Vitamin B2 (Riboflavin): 15% of the RDA.
•     Vitamin B3 (Niacin): 4% of the RDA.
•     Copper: 21% of the RDA.
•     Iron: 11% of the RDA.

• Phycology is the scientific study of algae.
• Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties, their taxonomy, and their use to humans.
• Cytology is the branch of biology and medicine concerned with the structure and function of plant and animal cells.
• Bacteriology is the study of bacteria.

• Agar, carrageenan and alginate are extracted from seaweeds and used to thicken a variety of foods, including soy milk, chocolate milk, ice cream, yoghurt, soups, salad dressings and jellies.
• Most brown algae contain the pigment fucoxanthin, which is responsible for the distinctive greenish-brown colour that gives them their name. 
• Phycoerythrin is a red protein-pigment complex from the light-harvesting phycobiliprotein family, present in red algae and cryptophytes, accessory to the main chlorophyll pigments responsible for photosynthesis.
  
• The Horseshoe Crab or King Crab is called a "living fossil" because it has been on earth for millions of years. 
• Ginkgo biloba is called a living fossil because all the other members of its group are now fossils. Cycads are one of the oldest forms of plant life; they were here long, long before dinosaurs stomped the Earth and have remained essentially unchanged, that's why they are called living fossil.