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Questions in biology

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - (b) (i) Explain the term ruminant as used in animal production. (ii) State one function each of the following organs in the digestive system of ruminants: (a) rumen (B) omasum (y) abomasum (c) (i) Distinguish between potential energy and kinetic energy. (ii) Calculate the kinetic energy of a car of mass 1.0×103kg moving with a velocity of 108.0km/h. (d). (i) Mention two greenhouse gases (ii) state three effects of greenhouse gases on climate

📝 Answered - Enzymes are A. monosaccharides B. proteins C. amino acids D. lipids

📝 Answered - Which form of energy is an input for photosynthesis? A. Nuclear energy B. Mechanical energy C. Light energy D. Electrical energy

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - Which equation shows how cells use the energy stored in an energy carrier? A. [tex]$NADPH \rightarrow NADP ^{+}+ H ^{+}$[/tex] B. [tex]$NADP ^{+}+ P \rightarrow$ ATP[/tex] C. [tex]$ATP \rightarrow ADP + NADPH$[/tex] D. [tex]$ADP + H ^{+} \rightarrow ATP$[/tex]

📝 Answered - Elevated portions of the cerebral cortex are called a. sulci b. plexuses c. gyri d. ventricles

📝 Answered - Which structure is found in the cytoplasm of a prokaryotic cell, but is not found in the cytoplasm of a eukaryotic cell? A. DNA B. ribosomes C. nucleus D. mitochondria

📝 Answered - This table lists examples of plants. \begin{tabular}{|l|l|l|}\hline \multicolumn{3}{|c|}{Plant Classifications} \\\hline & Gymnosperms & Ang \\\hline A & Flowering plants, grains, and fruit trees & Conifers, cy \\\hline B & Grains, flowering plants, and gingkos & Fruit trees, c \\\hline C & Fruit trees, cycads, and grains & Conifers, gingko \\\hline D & Conifers, cycads, and gingkos & Flowering plants, \\\hline\\\end{tabular} Which row ($A, B, C$, or D) in the table accurately categorizes the plants as gymnosperms?

📝 Answered - Which one of the following statements is correct about the nervous system? A. It takes air into and out of the body to supply oxygen and remove carbon dioxide. B. It uses blood vessels to transport blood around the body through the heart. C. It receives and processes sensory information from internal and external parts of the body. D. It consists of cells that produce and secrete chemicals into the bloodstream via a duct. What is the best justification for the role of voltage-gated ion channels in nerve impulse transmission? A. They actively respond to membrane potential changes, leading to depolarization. B. They block the ions movement across the membrane to sustain the neuron. C. They produce energy when the sodium ions move to the inside of the axon. D. They allow potassium ions to diffuse to the inside of the axon, forming repolarization.