Biology Learning Videos - Dr. BbosaEXPLORE ALL
Transport in flowering plants objective question, video
Questions selected to test and facilitate understanding Read More
DNA, RNA and protein synthesis structured questions
Questions selected to assist in understanding the topic at A-level Read More
DNA, RNA and protein synthesis objective questions
Questions selected to assist a candidate to understand the topic Read More
DNA, RNA and protein synthesis
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
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
Questions set to test and aid understanding of cell division at a-level Read More
PLE VIDEOSEXPLORE ALL
Well illustrated and explained revision video for integrated science PLE 2018 for primary seven, p7 Read More
PLE science 2017 section A
PLE science 2017 section A Read More
PLE 2012 integrated Science
Revision of primary leaving integrated science 2012 Read More
PLE science 2016 section A -video
Revision of PLE integrated Science 2016 section A Read More
A-level biology videosEXPLORE ALL
Transport in flowering plants objective question, video
Questions selected to test and facilitate understanding Read More
DNA, RNA and protein synthesis structured questions
Questions selected to assist in understanding the topic at A-level Read More
DNA, RNA and protein synthesis objective questions
Questions selected to assist a candidate to understand the topic Read More
DNA, RNA and protein synthesis
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
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
Questions set to test and aid understanding of cell division at a-level Read More
Cell divisions (meiosis and mitosis)
Stages of meiosis and mitosis and comparison between mitosis and meiosis Read More
Ecology Essay questions
Questions selected to test and enable understanding of ecology Read More
Ecology structured questions
Questions selected to test and enable understanding of the topic of ecology Read More
O level chemistry videosEXPLORE ALL
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
procedure of preparation of hydrogen and worked examples Read More
https://youtu.be/mBPSCDU8jws principles of preparation of gases i.e. preparatory state, purification stage, drying stage, and collection stage. Preparation oxygen, sample questions and answers Read More
https://youtu.be/uewj-Arxnys Stages of gas preparation, preparation of oxygen, testing for oxygen Read More
how to determine the rate of reaction Plus worked examples Read More
Bio Questions and AnswersEXPLORE ALL
Explain why measles vaccine administered at the age of 9 month
It was estimated that weaning on average occurs at this age, and the baby no longer gets antibodies against measles from the mothers. Read More
Explain why the impermeability of an axon membrane to sodium ion in part of a neuron helps to maintain resting potential in that part of the neuron
Impermeability of the membrane prevents entry of sodium ions which would cause depolarization Read More
Explain the effects of the heterozygote advantage in a population with increasing gene
Increasing gene flow reduces the probability of recessive alleles or disadvantageous alleles in the population as it introduces new alleles. This reduced the selection pressure ... Read More
State four physiological differences between C3 and C4 plants.
Difference between C3, and C4 plant C3 pathway C4 pathway 1 Photosynthesis occurs in mesophyll cells Photosynthesis occurs in mesophyll cells and bundle sheath cells ... Read More
Explain how light influences stomatal opening in a plant that has been previously in the dark.
When exposed to light, starch of the guard cells is converted into malic acid, Malic acid dissociate into malate and H+ ions in the guard ... Read More
Does milk contain iron?
Dairy products such as cheese, cottage cheese, milk and yogurt, although rich in calcium, have negligible iron content Read More
What part is played by the mammalian skin in excretion?
Sweating eliminates urea, a by-product of protein catabolism, excess water and salts Read More
What is the role of stored proteins during seed germination
Provide a source of amino acids and reduced N necessary for synthesis of enzymes, and for formation of structures in developing embryo. some may be ... Read More
Methods to reduce soils erosion are
Afforestation Planting grass cover Mulching Strip cropping Terracing Contour cropping Read More