Explain the structure of human sperm with a neat labelled diagram.
Explain the structure of human sperm with a neat labelled diagram.
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Questions and Answers For
O Level Biology
234 Questions
1 Answer Describe a transmissible disease as a disease in which the pathogen can be passed from one host to another
Describe a transmissible disease as a disease in which the pathogen can be passed from one host to another
1 Answer Describe that a double circulation provides a low pressure circulation to the lungs and a high pressure circulation to the body tissues
Describe that a double circulation provides a low pressure circulation to the lungs and a high pressure circulation to the body tissues
1 Answer Describe the functions of the types of human teeth in physical digestion of food
Describe the functions of the types of human teeth in physical digestion of food
1 Answer How does the staining process with fast green differ from that with safranin
How does the staining process with fast green differ from that with safranin
1 Answer What are the most effective dyes for staining xylem vessels in plant stems
What are the most effective dyes for staining xylem vessels in plant stems
1 Answer What types of stains are best for visualizing water pathways in plant stems
What types of stains are best for visualizing water pathways in plant stems
1 Answer Investigate, using a suitable stain, the pathway of water in a cut stem
Investigate, using a suitable stain, the pathway of water in a cut stem
1 Answer Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run out
Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run out
1 Answer Explain how fish stocks can be conserved using education, closed seasons, protected areas, controlled net types and mesh size, quotas and monitoring
Explain how fish stocks can be conserved using education, closed seasons, protected areas, controlled net types and mesh size, quotas and monitoring
1 Answer
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Top Questions
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drifting movement in fishes during migration
Drifting movement is a significant aspect of fish migration, particularly
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classification of fishes based on migration in dams in india
Fish migration is a critical aspect of aquatic ecosystems, significantly
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Do fish migrate in the winter?
Fish exhibit diverse migratory behaviors during winter, influenced by species-specific
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Topoisomerase: – A. Separates the DNA strands at the origin – B. Keeps the single-stranded DNA regions from coming back together – C. Re-coils the DNA into a helix after replication is complete – D. Breaks DNA backbone to remove tension produced by the helicase – E. Breaks hydrogen bonds between DNA and the RNA primers
D. Topoisomerase breaks the DNA backbone to relieve supercoiling tension
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What end overhangs?
The 3' end of the telomere strand typically has a
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What kind of cells need cell replication of their telomeres?
Actively dividing cells, such as stem cells, germ cells, and
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What percent of all human cancers have high levels of telomerase?
Around 85–90% of human cancers have high telomerase activity. This
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