Free Biodiversity and Variety of Life MCQs with Answers

2541. Algae are:

• A. Unicellular organisms only
• B. Filamentous organisms only
• C. Ranges from unicellular to filaments to huge multicellular organisms only
• D. Simple acellular organisms
• E. Ranges from unicellular to filaments to huge multicellular organisms

Explanation: Algae exhibit a wide range of forms, including unicellular, colonial, filamentous, and multicellular structures.

2542. Flagellum helps to propel the body of Euglena is enveloped by a flexible pellicle made of:

• A. Carbohydrates
• B. Starch & Lipids
• C. Proteins
• D. Lipids

Explanation: In the case of Euglena, the flexible pellicle that envelops its body is primarily made of proteins. These proteins provide structural support, maintain the shape of the organism, and allow for flexibility and movement. The proteins in the pellicle work in coordination with other components, such as the flagellum, to facilitate motion and locomotion in Euglena.

2543. Protozoa are divided into_classes.

• A. Two
• B. Three
• C. Four
• D. Five

Explanation: Phylum protozoa is classified into 4 classes: Rhizopoda, Mastigophora, Sporozoa, and Ciliata.

2544. Rhodophyta belong to:

• A. Algae, Protista
• B. Zygomycota, Fungi
• C. Zooflagellates, Protista
• D. Slime molds, Protista

Explanation: Rhodophyta, commonly known as red algae, are classified under the kingdom Protista. They are a distinct group of algae characterized by their red pigmentation.

2545. The characters common and different in protists and other kingdoms except monera

• A. Eukaryotic cell and blastula
• B. Prokaryotic cell and no blastula
• C. Eukaryotic cell and no embryo
• D. Prokaryotic cell and no embryo

Explanation: Protists are eukaryotic and, unlike plants and animals, they do not develop from embryos.

2546. Chloroplast of Chlamydomonas is

• A. Stellate
• B. Cup-­shaped
• C. Collar ­shaped
• D. Spiral

Explanation: Chlamydomonas has a single, large, cup-shaped chloroplast which is typical of many unicellular green algae.

2547. Pyrenoids are the centres for formation of

• A. Porphyra
• B. Enzymes
• C. Fat
• D. Starch

Explanation: Pyrenoids are the centers for the formation of starch. They are commonly found in certain photosynthetic protists, such as algae. Pyrenoids function as sites for starch synthesis and storage within the chloroplasts of these organisms.

2548. Protoctista is considered exclusive due to

• A. Their diverse body form
• B. Types of reproduction
• C. Modes of nutrition and lifestyles
• D. All of these

Explanation: Protoctista is unique due to its diverse body forms, various reproductive types, and multiple nutritional modes.

2549. Protista evolved from prokaryotes but which one of the followings evolved from protista

• A. Fungi
• B. Plantae
• C. Animalia
• D. All of these

Explanation: Protists are considered ancestors of fungi, plants, and animals in evolutionary history.

2550. All of the following are included in protoctista except

• A. Single celled protozoa
• B. Unicellular or multicellular algae
• C. Slime molds and choanocytes
• D. Cyanobacteria

Explanation: Cyanobacteria are prokaryotes and belong to Kingdom Monera, not Protista.