Is the following statement true or false? Explain
The phenotype of an organism reflects all of the alleles carried by that individual.
What will be an ideal response?
False. The phenotype, or the observable traits, of an organism often does not fully reflect its genotype, or the catalog of all alleles in the chromosomes. The reason is that some alleles are dominant (call these A) and other alleles are recessive (a). An individual who is heterozygous (Aa) for a dominant allele will have the same phenotype as one who is homozygous (AA).
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The main factor that leads to the loss of biodiversity is _____
A) habitat fragmentation B) habitat destruction C) industrialization D) transportation
The formation of the bivalent during meiosis
A. is required for the pairing of homologous chromosomes. B. contributes to the genetic diversity of a species. C. ensures that the resulting haploid cells will have the same combination of homologous chromosomes as the original diploid cell. D. aids the alignment of sister chromatids in a single row along the metaphase plate. E. occurs during meiosis I and meiosis II.
What does the term biogenesis mean?
A. Formation of life from nonliving chemicals B. Formation of self-replicating molecules C. Formation of chemicals from organic monomers D. Formation of life from preexisting cells
Which is an example of macroevolution?
a. conserved ancestral features of the modern day coelacanth b. the mass extinction of the dinosaurs 66 million years ago c. the evolution of humans from primates d. the adaptations of flowering plants driven by changes in pollinator behavior e. the evolution of antibiotic-resistant bacteria