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Questions in biology

📝 Answered - *Haylish had a common cold during the 6-month period. Mineral Supplement Study | Group | Dosage | Number of Common Cold Cases | | :---- | :------------ | :-------------------------- | | 1 | $50 mg /$ day | 10 | | 2 | $100 mg /$ day | 6 | | 3 | $150 mg /$ day | 5 | The company claims that the mineral supplement can effectively prevent the common cold. A scientist disputes the claim, saying an error exists in the setup of the groups for the investigation. Which change to the investigation would remove the source of this error? A. Test a fourth group, in which participants do not receive the mineral supplement. B. Test all three groups, with each participant receiving the mineral supplement for 12 months. C. Test only one group, with each participant receiving $200 mg /$ day of the mineral supplement. D. Test only two groups, one with each participant receiving $200 mg /$ day and one with $50 mg /$ day of the mineral supplement.

📝 Answered - Photosynthesis is an example of A. an exothermic reaction. B. an endothermic reaction. C. a reaction that gives off heat. D. a reaction that emits energy.

📝 Answered - Which organelle packages and distributes proteins that are received from the endoplasmic reticulum? A. vacuole B. cytoplasm C. Golgi apparatus D. ribosome

📝 Answered - 1. Name 3 organisms that break down their food outside. 2. Breakdown of food inside and breakdown of food outside depends upon ______ and ______. 3. Name 3 parasites which do not break down food either outside or inside. 4. Describe nutrition of human beings.

📝 Answered - Which two chemicals are mainly involved with nerve transmission? A. Potassium and Hydrogen B. Hydrogen and Nitrogen C. Sodium and Potassium D. Sodium and Nitrogen

📝 Answered - How can the green cover help to fight global warming?

📝 Answered - Red blood cells are termed A. metabolites B. leukocytes C. erythrocytes D. platelets

📝 Answered - If we ligate a foreign DNA at the BamHI site in pBR322, then the recombinant plasmid will: A. Show tetracycline resistance B. Grow on tetracycline containing medium C. Show ampicillin resistance D. Not grow on ampicillin containing medium

📝 Answered - Which of these organisms is a parasite? A. Fasciola hepatica B. Tape worm C. Paragonimus westermani D. Guinea worm

📝 Answered - (i) What is Integrated Pest Management? (ii) Give three advantages of Integrated Pest Management.