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Questions in biology

[Answered] Is [blank] necessary for muscle function? 1) Iron 2) Potassium 3) Zinc 4) Phosphorus

[Answered] What type of environment does oil spill mainly affect? QUESTION 12 List two land-based sources of oil spill or leak. QUESTION 13 Animals living in

[Answered] In the double fertilization of angiosperms, one sperm cell fertilizes the egg cell. With which cell type does the second sperm fuse? A. Another egg cell B. The polar nuclei C. One of the synergids D. One of the antipodal cells

[Answered] Sending plastic-eating fungi to landfills to remove pollutants is an example of A. biodiversity hotspots. B. biodiversity expansion. C. bioremediation. D. biological augmentation.

[Answered] Animal cells have an organelle in which their DNA is located. This organelle is called a A. plasmid B. nucleus C. plasma membrane D. nucleoid

[Answered] Which of the following scientists is known as the founder of modern genetics? A. Johann Kepler B. Sir Charles Lyell C. Gregor Mendel D. Robert Hooke

[Answered] What factor is NOT necessary for evolution by natural selection to occur? A. Heritability of traits B. Variation in traits C. Genetic drift D. Differential survival and reproduction

[Answered] Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end of the activity, write a brief evaluation of your work. Activity: In this activity, you'll analyze and interpret data about a population. A scientist has been monitoring the height of a small population of wild sheep for 30 years. He monitored 200 adult male sheep from each year and then broke down their height into ranges. Study the data in the chart, and then answer the questions that follow. | Height | Less than 1 m | 1 m - 1.19 m | 1.2 m - 1.4 m | Greater than 1.4 m | | --------------- | ------------- | ------------ | ------------- | ------------------ | | 30 Years Ago | 45 | 110 | 40 | 5 | | Present Data | 15 | 84 | 75 | 26 |

[Answered] Researchers use the term _______ to describe biological characteristics associated with being male/female/intersex/other. A. gender B. sex C. sexual behavior D. sexual orientation

[Answered] Answer any three questions only. 1. (a) List four floral whorls of Hibiscus flower. (b) Explain the processes involved in digestion of protein in man. (c) In a tabular form, give two differences between mitosis and meiosis. 2. (a) Draw a well labelled diagram (8-10 cm long) of the mammalian skin. (b) List four types of placentation in flowering plants. (c) State four methods of birth control in human. 3. (a) Describe the mechanism of opening and closing of stomata in a leaf. (b) Name two pollutants each of air and water. (c) Name three abiotic factors that affect organisms in an ecosystem. 4. (a) Name three supporting tissues in plants. (b) List three characteristics of enzymes. (c) Give three excretory organs in mammals. 5. (a) List four examples of reflex action. (b) Why are chromosomes regarded as the basis of heredity?