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O level chemistry videosEXPLORE ALL

Genotype
Bbosa Science- 06/05/2021 0

Genotype This is the genetical constitution of an organism i.e. the particular set alleles, leading to observable characteristics Please Subscribe to promote this website. Subscription ... Read More

Preparation of hydrogen
Bbosa Science- 07/11/2020 1

procedure of preparation of hydrogen and worked examples Read More

Preparation of oxygen with worked examples
Bbosa Science- 07/08/2020 2

principles of preparation of gases i.e. preparatory state, purification stage, drying stage, and collection stage. Preparation oxygen, sample questions and answers Read More

Preparation of gases
Bbosa Science- 06/24/2020 0

Stages of gas preparation, preparation of oxygen, testing for oxygen Read More

Biology Learning Videos - Dr. BbosaEXPLORE ALL

DNA, RNA and protein synthesis

Bbosa Science- 02/19/2021 0

Nucleotides, bases, evidences that DNA is the genetic material, comparison between the structure of DNA and RNA; replication, transcription, and translation Read More

Asexual reproduction and alternative generation

Bbosa Science- 02/19/2021 0

Advantages and disadvantages of asexual reproduction, alteration of generations in bryophytes and ferns; comparison of life cycle of moss and ferns Read More

Meiosis and mitosis revision questions

Bbosa Science- 02/19/2021 0

Questions set to test and aid understanding of cell division at a-level Read More

A-level biology videosEXPLORE ALL

DNA, RNA and protein synthesis

Bbosa Science- 02/19/2021 0

Nucleotides, bases, evidences that DNA is the genetic material, comparison between the structure of DNA and RNA; replication, transcription, and translation Read More

Asexual reproduction and alternative generation

Bbosa Science- 02/19/2021 0

Advantages and disadvantages of asexual reproduction, alteration of generations in bryophytes and ferns; comparison of life cycle of moss and ferns Read More

Meiosis and mitosis revision questions

Bbosa Science- 02/19/2021 0

Questions set to test and aid understanding of cell division at a-level Read More

Cell divisions (meiosis and mitosis)

Bbosa Science- 02/19/2021 0

Stages of meiosis and mitosis and comparison between mitosis and meiosis Read More

Ecology Essay questions

Bbosa Science- 02/19/2021 0

Questions selected to test and enable understanding of ecology Read More

Ecology structured questions

Bbosa Science- 02/19/2021 1

Questions selected to test and enable understanding of the topic of ecology Read More

Bio Questions and AnswersEXPLORE ALL

Bio Questions and answers

Differences between inhaled air and exhaled air

Bbosa Science- 05/02/2021 3

Differences between inhaled air x and exhaled air Inhaled air x Exhaled air y Contains more oxygen Contains less oxygen Contains little carbon dioxide Contains ... Read More

Differences between inhaled air and exhaled air
Bio Questions and answers

Hearing o-level

Bbosa Science- 05/02/2021 0

Hearing o-level Sound funnels into the ear canal and causes the eardrum to move. The eardrum vibrates with sound. Sound vibrations move through the ossicles ... Read More

Hearing o-level
Bio Questions and answers

Accommodation of the eye

Bbosa Science- 05/02/2021 2

Accommodation of the eye Is the ability of the eye to near and far objects To see near objects, the ciliary muscle contract releases the ... Read More

Accommodation of the eye
Functions of active transport

Functions of active transport

Bio Questions and answersBbosa Science- 05/02/2021 0

Functions of active transport Absorption of minerals in the stomach Absorption of minerals in ascending loop of Henle Absorption of mineral in the root hair ... Read More

Adaptations of spongy mesophyll of a leaf

Adaptations of spongy mesophyll of a leaf

Bio Questions and answersBbosa Science- 05/02/2021 0

Adaptations of spongy mesophyll of a leaf - loosely packed to allow free movement of air - contains chloroplast for trapping light energy and carry ... Read More

Adaptation of the leaf cuticle

Adaptation of the leaf cuticle

Bio Questions and answersBbosa Science- 05/02/2021 1

Adaptation of the leaf cuticle - thin to allow easy penetration of light - transparent to allow passage of light - perforated to allow exchange ... Read More

Adaptation of leaves to photosynthesis

Adaptation of leaves to photosynthesis

Bio Questions and answersBbosa Science- 05/02/2021 2

Adaptation of leaves to photosynthesis The leaf is only a few cells thick for easy penetration of light and gases. Wax cuticle prevent excessive water ... Read More

Testing for starch in the leaves

Testing for starch in the leaves

Bio Questions and answersBbosa Science- 05/02/2021 0

Testing for starch in the leaves A leaf is boiled in water to kill protoplasm and burst starch granule present Then, it is boiled in ... Read More

Adaptations of halophytes to their habitat

Adaptations of halophytes to their habitat

Bio Questions and answersBbosa Science- 05/02/2021 0

Adaptations of halophytes to their habitat Possess succulent leaves and/or stem for storage of water Have salt glands to secrete excess salts Have thick cuticle ... Read More