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Questions in biology

📝 Answered - An example of xylem tissue is: A. openings in leaves B. long fibres in celery C. cells that cover the surface of leaves D. small projections extending from roots

📝 Answered - If bryophytes developed vascular tissue, they would be able to: Select one: A. fertilize their eggs without the need for a thin film of water B. better compete for light C. return to an aquatic environment D. withstand higher temperatures

📝 Answered - Unlike animal cell mitosis, during mitosis in a plant cell, __________________. Select one: A. Cell wall formation occurs along the same line that chromosomes lined up for metaphase. B. A parent cell divides twice to create four haploid gametes. C. The number of chromosomes doubles between parent and daughter cells. D. Chromosomes do not condense.

📝 Answered - Restriction enzymes: A. Weld together fragments of DNA. B. Attach to DNA molecules at specific sites and cut both strands of DNA at that place. C. Only cut RNA molecules at specific sites and cut both strands of DNA at that place. D. Are chemical machines that make parts of the cell membrane.

📝 Answered - What are the products of the replication of one DNA molecule? Select one: A. Two strands joined into one double-stranded DNA molecule B. Two identical double-stranded DNA molecules C. A set of four sister chromatids D. A pair of homologous chromosomes E. Four identical double-stranded DNA molecules

📝 Answered - Fill in the blanks of the following sentences. A chromosome contains one long __________ molecule. Each gene in this molecule gives the instructions for making a __________________. Both chromosomes in a pair of ______________________ chromosomes have the same ___________, but the two chromosomes may have different _________________. Chromosomes that are not homologous have different ______________ which give the instructions for making different kinds of proteins.

📝 Answered - Write a caption to describe how the butterfly's long mouthpart helps it survive.

📝 Answered - A scientist finds a new life form and determines that it performs photosynthesis. Which of the six kingdoms could it belong to? Select the list that contains all the possible kingdoms. A. Protista, Fungi, and Plantae B. Eubacteria, Archaebacteria, Fungi, and Plantae C. Eubacteria, Archaebacteria, Protista, and Plantae D. Protista and Plantae

📝 Answered - For biological evolution to occur by way of natural selection, the trait being selected for need NOT: A. be heritable B. vary among individuals C. increase an individual's lifespan D. increase an individual's reproductive success

📝 Answered - Explain how the use of chemicals designed to kill grasshoppers could reduce the population of peregrine falcons.