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Questions in biology

[Answered] The shorter and longer arm of a submetacentric chromosome are referred to as ____. A. m-arm and n-arm respectively B. q-arm and p-arm respectively C. p-arm and q-arm respectively D. s-arm and l-arm respectively

[Answered] 1. Assertion (A): Rhododendrons found in the forests of Nilgiris have short height and small leaves. Reason (R): These adaptations help them to survive heavy winds on mountain tops. 2. Assertion (A): Cactus plants have thick and fleshy stems. Reason (R): Such adaptations help to maximise water loss. 3. Assertion (A): Cheetah reintroduction project was initiated in the year 1973. Reason (R): This project aimed to restore the declining population of cheetahs.

[Answered] Scientists plotted data for two animal populations on a scatterplot: Population A, which they graphed along the x-axis, and Population B, which they graphed along the y-axis. The data showed a strong negative correlation. Which of the following statements is justified? A) The rise in Population A caused the decline in Population B. B) The decline in Population B caused the rise in Population A. C) Because the correlation is negative, there cannot be causation between the two populations. D) The rise in Population A is correlated to the decline in Population B, but causation is unknown.

[Answered] 4. Why do we sweat more on a humid day? How does sweating help us in cooling our body? 5. Why does a desert cooler work better on a hot dry day? What is the principle behind its working?

[Answered] QUESTION 5 Living organisms in an ecosystem can be divided into three nutritional groups. Name these three groups. QUESTION 6 Name and explain the two types of competition. (i) QUESTION 7 Where can you find large herbivores like cows and horses? QUESTION 8 In a healthy ecosystem, what would trophic level A be composed of?

[Answered] Which statement best describes how the environment influences the traits of an individual? A. The environment influences the gene expression which can change the genotype. B. The environment influences the gene expression which can change the phenotype. C. The environment influences only external factors. D. The environment influences only internal factors.

[Answered] Which environmental change is considered short term? A. forest fire B. ice age C. mountain building D. solar energy changes

[Answered] Explain in a short essay how these five mechanisms enable evolution to occur. Your essay should include the following: (i) Title (ii) Introduction (iii) Content (iv) Conclusion

[Answered] Which statement correctly describes how greenhouse gases increase Earth's temperature? A. Earth's surface reflects short-wavelength radiation from the sun. Greenhouse gases absorb the short-wavelength radiation and warm the atmosphere. B. Greenhouse gases absorb short-wavelength radiation from the sun. The radiation increases their temperature and warms the planet. C. Greenhouse gases block long-wavelength radiation from the sun, leaving only short-wavelength radiation to pass through the atmosphere. This radiation warms the planet. D. Earth's surface absorbs short-wavelength radiation from the sun and re-radiates it as long-wavelength radiation. Greenhouse gases prevent the long-wavelength radiation from escaping the atmosphere.

[Answered] Which microorganism is correctly matched with its industrial use? (1) Streptococcus – Vinegar production (2) Rhizobium – Antibiotic production (3) Saccharomyces – Alcohol fermentation (4) Penicillium – Nitrogen fixation