Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
In which virus two single RNA strands are present? What is the role of reverse transcriptase?
HIV has two single RNA strands in its nucleoid. Reverse transcriptase enzyme catalyses the formation of DNA from RNA. It is found in some RNA viruses called retroviruses, e.g., HIV
HIV has two single RNA strands in its nucleoid. Reverse
See lesstranscriptase enzyme catalyses the formation of DNA
from RNA. It is found in some RNA viruses called
retroviruses, e.g., HIV
Plants are autotrophic. Can you think of some plants that are partially heterotrophic?
Plants are generally autotrophic. However, some plants like Nepenthes (pitcher plant), Utricularia (bladderwort), venus fly trap and some parasites like Cuscuta are examples of partially heterotrophic plants. They supplement their nitrogen requirement by capturing and digesting insects.
Plants are generally autotrophic. However, some plants
See lesslike Nepenthes (pitcher plant), Utricularia (bladderwort),
venus fly trap and some parasites like Cuscuta are
examples of partially heterotrophic plants. They
supplement their nitrogen requirement by capturing and
digesting insects.
Mention four industrial importance of lichens.
Lichens are industrially important in the following ways (i) They are used to make perfumes and soaps. (ii) They are used to obtain alcohol after brewing and distillation. (iii) Their absence in the environment indicates air pollution. (iv) They are used to create medicines to various lung diseasesRead more
Lichens are industrially important in the following ways
See less(i) They are used to make perfumes and soaps.
(ii) They are used to obtain alcohol after brewing and
distillation.
(iii) Their absence in the environment indicates air
pollution.
(iv) They are used to create medicines to various lung
diseases and hydrophobia.
Write the meaning of these terms.
(i) Lignocolous Growing on wood (ii) Saxicolous Growing on rock (iii) Certicolous Growing on bark (iv) Terricolous Growing on soil.
(i) Lignocolous Growing on wood
See less(ii) Saxicolous Growing on rock
(iii) Certicolous Growing on bark
(iv) Terricolous Growing on soil.
What do the terms phycobiont and mycobiont signify?
Phycobiont and mycobiont are parts of lichens. the phycobiont is the algal partner in lichens and mycobiont is the fungal partner in lichens.
Phycobiont and mycobiont are parts of lichens.
See lessthe phycobiont is the algal partner in lichens and mycobiont
is the fungal partner in lichens.
Give the name of the causative agents of
(i) Red rot Colletotrichum falcatum (ii) Early blight Alternaria solani (iii) Wilts Fusarium oxysporum (iv) Brown leaf spot of rice Helminthosporium oryzae
(i) Red rot Colletotrichum falcatum
See less(ii) Early blight Alternaria solani
(iii) Wilts Fusarium oxysporum
(iv) Brown leaf spot of rice Helminthosporium oryzae
Give the name of a fungus used in biological control of other fungi. How is it harmful to humans?
Trichoderma, is a soil fungus used in biological control of other fungi as it produces allelochemicals against them. If this fungus happens to pass into human alimentary canal, it produces leukopenia called alimentary canal aleukia.
Trichoderma, is a soil fungus used in biological control of
See lessother fungi as it produces allelochemicals against them. If
this fungus happens to pass into human alimentary canal,
it produces leukopenia called alimentary canal aleukia.
What are the criteria used to classify fungi?
Criteria used to classify fungi are (i) Morphology and appearance of fungus (ii) Life-cycle (iii) Types of spores and their dispersal (iv) Physiology and biochemistry
Criteria used to classify fungi are
See less(i) Morphology and appearance of fungus
(ii) Life-cycle
(iii) Types of spores and their dispersal
(iv) Physiology and biochemistry
What are the most common habitats of fungi?
Fungi are known to grow well in moist, dark and warm places so, they can be commonly seen in any habitat where organic matter and moisture are available.
Fungi are known to grow well in moist, dark and warm
See lessplaces so, they can be commonly seen in any habitat
where organic matter and moisture are available.
Why virus cannot grow on non-living culture medium?
A virus cannot grow on non-living culture medium because it needs living cells for its metabolism and multiplication.
A virus cannot grow on non-living culture medium
See lessbecause it needs living cells for its metabolism and
multiplication.