FREE NEET Biology Practice MCQ Test: Biological Classification Exercise 4 Questions Answers With Detailed Explanations [PDF]

Answer: (d)

Answer: (a)

Morel and truffles are used as food and they are members of Ascomycetes fungi.

Answer: (c)

Answer: (d)

Answer: (a)

All prokaryotic organisms come under Kingdom Monera. Escherichia coli is a bacterium. Monera includes bacteria, mycoplasmas, cyanobacteria (blue green algae) and actinomycetes.

Answer: (c)

Black stem rust is caused by Puccinia graminis tritici. The genus Puccinia includes 700 species, which cause rust diseases of many economic plants such as wheat, barley, oats, etc. It is called a rust because of the reddish brown color of the spores that are found chiefly upon the surface of the host leaves and stems. P. graminis is heteroecious i.e., requiring two hosts, wheat and barberry for the completion of normal life cycle. According to the nature of the spores, the life cycle of the P. graminis is divided into five stages. It is during, teleuto stage, the teliospore (or teleutospores ) produce dark brown to black pustules on the surface of stems and leaves of the wheat that results into 'black stem rust of wheat'.

Answer: (d)

Answer: (b)

Answer: (d)

Answer: (a)

Answer: (b)

The tailed bacteriophages contain a hollow helical tail which serves both as cell attachment organ and as a tube that facilitates the entry of nucleic acid into the host cell. The tail consist of tail plate and the caudal fibres.

Answer: (d)

Answer: (c)

Sticky character of the bacterial wall is due to glycocalyx which is rich in glycoproteins.

Answer: (c)

Answer: (c)

Cyanobacteria are aquatic and photosynthetic, i.e., they live in the water, and can manufacture their own food. They are quite small and usually unicellular, though they often grow in colonies large enough to see. They are the first organisms to make the atmosphere aerobic.

Answer: (a)

Answer: (c)

Answer: (c)

Answer: (d)

Answer: (b)

Plasmodium has two hosts.

(i) Female Anopheles mosquito : Here the sexual phase of the malarial parasite occurs and it is considered the definitive host of malarial parasite.

(ii) Human beings : Here the asexual phase of malarial parasite occurs. It is considered as the intermediate host. Options (b), (c) and (d) are the stages of the asexual phase of Plasmodium.