Heredity Post Test exam new update

Heredity Post Test exam new update A hydra is an aquatic organism that lives in fresh water. During reproduction an outgrowth begins to form on the parent. The outgrowth continues to develop into the daughter organism and eventually breaks off of the parent. Which type of reproduction does this represent? A. vegetative propagation B. regeneration C. binary fission D. budding Select the correct answer from each drop-down menu. Starfish are able to reproduce both sexually and asexually. In an area of the ocean that is gradually changing due to increasing temperatures, it is more advantageous for starfish to reproduce__________ because they will be able to ___________. To reproduce, female elephants produce eggs and male elephants produce sperm. Offspring are produced by the fusion of an egg with a sperm cell. Which statement is true about the offspring? A. The offspring are genetically distinct from the parents because the egg and sperm are both diploid. B. The offspring are genetically identical to the parents because they are produced by sexual reproduction. C. The offspring are genetically identical to the parents because the egg and sperm are both diploid. D. The offspring are genetically distinct from the parents because they are produced by sexual reproduction. As a child, Alex was short for his age. But during his teenage years, his height increased and he surpassed most of his friends. What must have occurred to create this growth spurt? A. Cells in Alex's body underwent meiosis to create new tissue. B. Cells in Alex's body underwent mitosis to create new tissue. C. Cells in Alex's body produced haploid cells that formed new muscle. D. Cells in Alex's body produced new tissue by budding. A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides into cells of each group and allowed DNA replication to begin. When replication was halfway completed, she injected a drug into the cells to stop replication. She then examined the cells to determine the distribution of the newly-synthesized DNA. She found each cell of group A had many segments of new DNA in its nucleus, while each cell of group B had a single segment of new DNA in its cytoplasm. What can the researcher conclude about the cells? A. The cells in group A are eukaryotic because they replicate their DNA in the cytoplasm or nucleus. B. Group A cells are prokaryotic because they must have many origins of replication. C. The cells in group B are prokaryotic because they replicate their DNA in the cytoplasm. D. Group B cells are eukaryotic because they must have a single origin of replication. - What is the importance of DNA replication to all living organisms? A. DNA replication removes harmful traits from an organism. B. DNA replication determines which genes are active. C. DNA replication ensures that gametes have unique genes. D. DNA replication passes on traits from parents to offspring. Which statement about DNA replication is true? A. Prokaryotes only have one origin of replication to initiate replication. B. Eukaryotes can only replicate one segment of a chromosome at a time. C. Prokaryotes can only replicate their single circular chromosome in the nucleus. D. Eukaryotes only have one circular chromosome that unwinds at multiple locations. - Match the terms with their definitions. A.) dominant gene B.) phenotype C.) gene D.) genotype D.)the complete range of alleles an organism carries for a specific trait A.) an allele that determines the outward trait of a heterozygous organism B.)the observable characteristics of an organism How do mutations lead to variation? A. by providing a source of energy for cells B. by giving organisms new features for survival C. by producing changes in the genetic code D. by signaling proteins to be synthesized Which mutation does the given change in nucleotide sequence represent? ATTGCATC → ATACGTTC A. translocation B. substitution C. inversion D. duplication