What do \"fimbriae\" of bacteria do? catch food absorbing liquid food. sticking
ID: 181335 • Letter: W
Question
What do "fimbriae" of bacteria do? catch food absorbing liquid food. sticking to a substrate help in sexual reproduction all of the above What is the evolutionary advantage of closed circulatory system over an open circulatory system? open circulatory system are subject to contamination from the environment. blood pressure is higher in an open circulatory system. blood in a closed circulatory system can be shunted where it is most needed. blood loss is greater in open circulatory system. A and D only. Picking up naked extracellular DNA molecule is accomplished during transcription conjugation transformation. transduction translation Iodine is added to commercially prepared table salt to help prevent deficiencies of this essential mineral. Which gland(s) require iodine to function properly? Parathyroid gland Adrenal gland Ovaries and testes. thyroid gland. pancreas Ovaries and testes. Which of the following do all fungi have in common? meiosis in basidia symbioses with algae sexual life cycle. coenocytic hyphae absorption of nutrients To which kingdom would a multicellular, eukaryotic, photosynthetic organism belong? Protista Fungi Plantae. Animalia None of the above Protonephridia are excretory organs found in Earthworms insects jellyfish Flatworms vertebrates Animals are distinct among multicellular organisms because: their cells lack rigid cell walls and are flexible. They can move rapidly and are in more ways than members of other eukaryotic kingdoms. they develop from a zygote in characteristic embryonic development. they show great diversity in size, form and structure. all of the above choices are correct.Explanation / Answer
86.Fimbriae are short tube like projections in grame negative bacteria. Ends of fimbriae have a protein called adhesin which helps it in sticking on to a sustrate or to another bacteria. Answer is C.
87.In open circulatory system as blood flows through open spaces blood flow happens at slow rate. So the supply and elimination of raw materials to organs is slow. While in closed circulatory system blood flows at higher velocity so that the demand of various organs in a higher level organism can be coped up as and when required. Answer is C
88.Transformation is the process where DNA is transferred from one bacteria to another, provided the recepient bacteria is competent. Competence occurs naturally during stress or can also be induced articially in a lab so that you can add any DNA of interest into a bacteria and get many copies of your desired DNA. Answer is C
89.Iodine is essential for synthesis of thyroid hormones namely throxine and triiodothyronine. Deficiency of iodine leads to inefficient production of these hormones thereby causing enlargement of thyroid gland. This condition is also called goiter.Answer is D.
90.Fungi are eukaryotic heterotrophs. They absorb nutrients from the environment by releasing enzymes into the surrounding. They can reproduce both sexually and asexually and have both septate and aseptate hyphae. Meiosis in basidia and relation with algae occurs only in some special classes of fungi. Answer is E.
91.Plants are multicellular, eukaryotic, photosynthetic organisms. Hence answer is C
92.Protonephridia are bundles of specialized excretory cells called flame cells found in flat worms. Answer is D
93.Animal cells do not have cell wall. Embryonic development in animals is peculiar.Animals can move rapidly and show great range of diversity in size, form and structure. Answer is E.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.