简答题Eukaryotic cells contain an assortment of membrane-enclosed cytoplasmic structures called ________. A、eukarya B、organelles C、cytoplasm D、ribosomes简答题Both of the _______ are Prokaryotes. A、Bacteria and Archaea B、Bacteria and fungi C、Archaea and fungi D、protozoa and animals简答题A microbial ___________ is a collection of cells that have been grown in or on a nutrient medium. A _________ (plural, media) is a liquid or solid nutrient mixture that contains all of the nutrients required for a microorganism to grow. A、medium, culture B、culture, medium C、culture, nutrient D、medium, microbe简答题The first person to see bacteria, the smallest microbial cells, was ____________ A、Antoni van Leeuwenhoek B、Robert Hooke C、Louis Pasteur D、Robert Koch简答题The chromosome aggregates within the prokaryotic cell to form the ___________, which is a mass visible in the electron microscope. A、gene B、genome C、nucleoid D、nucleus简答题Carl Woese (1928–2012) realized in the 1970s that the sequence of ____________ molecules and the genes that encode them could be used to infer evolutionary relationships between organisms. A、mRNA B、ribosomal RNA C、ribosomal protein D、mitochondria RNA简答题Protein-coding sequences of DNA are known as_______. A、genes B、RNA segments C、chromosomes D、genome简答题Many prokaryotic cells can also exchange genes with neighboring cells, either of the same species or of a different species, in the process of ____________. A、growth B、vertical gene transfer C、horizontal gene transfer D、evolution简答题Which one has the membrane-enclosed organelles? A、viruses B、all cells C、prokaryotic cells D、eukaryotic cells简答题The universal tree of life based on rRNA gene sequences is a genealogy of all life on Earth. The tree is called ___________. A、phylogenetic tree B、molecular tree C、genome tree D、ribosomal tree