Consider the following statements about biological communities. I. Their members share a common gene pool II. The community remains stable even though some physical aspects of the environment may undergo a change. III. It consists of all the populations living in a particular area. IV. A community interacts with a non-living environment and both function together to form an ecosystem Which two of the above statements are true?
Correct answer: E. 3 and 4
- A. 1 and 2
- B. 1 and 3
- C. 2 and 4
- D. 2 and 3
- E. 3 and 4
Explanation
Different living and nonliving things in a single habitat form a single community. Since different species are present they have different characteristics so the gene pool is not the same. Change in the environment does cause a change in the balance of genes in the environment so the community does not remain stable. The last two statements (iii) and (iv) are right that as previously mentioned the community is all the population living in a particular area. Secondly, the community involves biotic(living) and abiotic(non-living) factors interacting with one another.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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