Tag: science(biology)
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Solar Panels and Application of Solar Energy in Practical Daily Activities
Solar Panels and Application of Solar Energy in Practical Daily Activities. SOLAR PANELS Solar panels or photovoltaic (PV) cells for electricity consist of solar cells (semiconductor material such as silicon). It is a device that converts heat energy from the solar radiation(sunlight) directly into electricity using the photoelectric effect. The photoelectric effect is the name…
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2018 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS.
2018 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS. QUESTIONS 1. The scientist who introduced binomial nomenclature in the classification of organisms was A. Carolus Linnaeus. B. John Ray. C. Charles Darwin. D. Louis Pasteur. 2. Which of the following statements is true about arthropods? A. Prothorax bears only, wings B. Prothorax bears only legs C.…
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2019 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS.
2019 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS. QUESTIONS 1. Which of the following structures will NOT be found in the nucleus of a cell? A. DNA B. Nucleolus C. Lysosome D. Centriole 2. An example of organ level of organization is _______ A. bird B. kidney C. spermatozoon D. xylem 3. A structural similarity…
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2017 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS.
2017 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS. QUESTIONS 1. Which of the following groups of animal do not possess a nervous system? A. Porifera B. Cnidaria C. Platyhelminthes D. Nematoda 2. The structural similarities in Paramecium and Euglena are in the A. shape of locomotory organs B. blunt anterior and pointed posterior C. presence…
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2016 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS.
2016 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS. QUESTIONS 1. An example of an organism that exists as a colony is A. Spirogyra B. Paramecium C. Euglena D. Volvox 2. Gymnosperms bear naked seeds because they A. ovary B. colourful flowers C. pollen grains D. stigma 3. DNA formation is associated with A. Golgi bodies…
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2022 WASSCE BIOLOGY 1 OBJECTIVE, QUESTIONS AND ANSWERS.
2022 WASSCE BIOLOGY 1 OBJECTIVE, QUESTIONS AND ANSWERS. QUESTIONS 1. Which of the following organisms is slipper-shaped? A. Chlamydomonas B. Euglena C. Amoeba D. Paramecium The diagram below is a pie chart showing the size of the four main Classes of the Phylum Arthropoda. Study it and answer questions 2 and 3. 2. Which of…
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2016 WASSCE; BIOLOGY PAPER 2 QUESTIONS AND ANSWERS.
2016 WASSCE; BIOLOGY PAPER 2 QUESTIONS AND ANSWERS. QUESTION 01 (a) (i) List three forms in which living cells exist Forms in which living cells exist Single/free-living Colony/colonial Filamentous/filament Part of a living (ii) Give one example each of the forms listed in 1 (a) Single/free-living Amoeba Chlamydomonas Paramecium Euglena Colony/colonial Eudorina Pandorinallolvox Sponges Filamentous/filament…
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2024 WASSCE; BIOLOGY PAPER 1 QUESTIONS AND ANSWERS.
2024 WASSCE; BIOLOGY PAPER 1 QUESTIONS AND ANSWERS. QUESTIONS 1. Animals that can vary their body temperature in response to changes in their environments are A. poikilothermic. B. homoiothermic. C. diploblastic. D. triploblastic, The diagram below is an illustration of the drawing of a mammal by a student. Use it to answer question 2. 2.…
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WASSCE 2015 BIOLOGY PAPER 2 QUESTIONS AND ANSWERS.
WASSCE 2015 BIOLOGY PAPER QUESTIONS AND ANSWERS. QUESTION 01 (a)Explain briefly sexual reproduction in Rhizopus. Answer: Sexual reproduction in Rhizopus – By conjugation. It is usually between two strains of hyphae Known as + and – plus and minus/ opposite mating types The hyphae come in contact And produce small projections of their walls Which…
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2015 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS (QUIZ)
Energy, Enzymes, Biological Reactions, and 2015 WASSCE BIOLOGY PAPER 1 QUESTIONS AND ANSWERS (QUIZ). Life, Energy, and the Laws of Thermodynamics Energy Energy is the capacity to do work. Kinetic energy is the energy of motion. Potential energy is energy stored in an object because of its location or chemical structure. Energy may be readily converted…
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2014 WASSCE; BIOLOGY PAPER 2 QUESTIONS AND ANSWERS
2014 WASSCE; BIOLOGY PAPER 2 QUESTIONS AND ANSWERS. Question 1 a. (i) List three characteristics of living Answer: Movement/Locomotion, Excretion, Respiration, Reproduction, Irritability/Sensitivity/Response, Growth/Development, Nutrition/Feeding. ii. Explain briefly the characteristics listed in (a)(i) Answer: Movement/Locomotion: Living things change the position of their whole body or parts of their body from one place to another in…
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Understanding Bright‐Field and Phase‐Contrast Microscopy.
Understanding Bright‐Field and Phase‐Contrast Microscopy. Different types of light microscopes use different types of illumination. In a bright‐field microscope, the cone of light that illuminates the specimen is seen as a bright background against which the image of the specimen must be contrasted. Bright‐field microscopy is ideally suited for specimens of high contrast, such as…
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When ants leave their nest to search for food, how do they find their way back?
How Do Ants Navigate? When ants leave their nest to search for food, how do they find their way back? The Saharan desert ant lives in colonies and makes a living by scavenging the dead carcasses of insects. Individuals leave the burrow and search for food at midday when temperatures at the surface can reach…
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Why Mosquitoes Are So Dangerous Now.
Why Mosquitoes Are So Dangerous Now. Mosquitoes carry a number of viruses and parasites that can be harmful to human health, including malaria, dengue, yellow fever, chikungunya, West Nile virus, and eastern equine encephalitis. Different species of mosquitoes are adept at spreading different viruses. The species primarily responsible for spreading eastern equine encephalitis, Culiseta melanura,…
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How the Brain Builds Memory and Knowledge; Through Patterning and Prediction.
How the Brain Builds Memory and Knowledge; Through Patterning and Prediction. When your brain turns sensory input into memory, you learn. The construction of new memories allows your brain to learn by experience and predict the outcome of your behavior. Memory is a survival requirement for animals that must learn, store, and recall how they…
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Neuroplasticity and the Continually Growing Brain.
Neuroplasticity and the Continually Growing Brain. Neuroplasticity (often shortened to plasticity) includes the growth of new neuronal connections and the pruning of unused connections between neurons. Neuroplasticity is a physical reshaping of the brain in response to life experiences and mental manipulation of information. Plasticity growth adds new memories by linking new information to existing…
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The Key to Building Better Brain.
The Key to Building Better Brain. Everything we learn comes to the brain through our senses. However, the brain has built-in obstacles to sensory information input. It is an amazing organ, but it cannot process the billions of bits of information that bombard it every second. To deal with the barrage, it is equipped with…
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Navigating Our Brain Waves for a Successful Meditation.
Navigating Our Brain Waves for a Successful Meditation. If meditation is about entering the autonomic system so that we can become more suggestible and overcome the challenges just mentioned, then we need to know how to get there. The short answer is that we get there on a brain wave. The brain state we happen…
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Demystifying the Act of Meditation and Why Meditation Can Be So Challenging.
Demystifying the Act of Meditation and Why Meditation Can Be So Challenging. Like hypnosis, meditation is another way to bypass the critical mind and move into the subconscious system of programs. The whole purpose of meditation is to move your awareness beyond your analytical mind to take your attention off your outer world, your body,…
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Declarative/Explicit Memories and Nondeclarative/Implicit Memories.
Declarative/Explicit Memories and Nondeclarative/Implicit Memories. NONDECLARATIVE MEMORIES We have implicit, or nondeclarative, memories, sometimes also called procedural memories. This kind of memory kicks in when you’ve done something so many times that you aren’t even consciously aware of how you do it. You’ve repeated it so often that now your body knows it as well…
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