Sieve tube elements - Study guides, Study notes & Summaries

A virus has been discovered. The virus has no envelope and consists of a helical capsid surrounding its dsDNA genome. During assembly, the pac site of the genome ensures that it is properly packaged by the capsomeres. Which of the following amino acids is/are expected to be on the capsomere domain that interacts with the pac site? A. lysine B. methionine C. glycine D. arginine E. A and D Answer: A and D Explanation: DNA has a negative charge, so positively charged amino acids, such as...

what is passive immunity and how is it produced? - ANSWER produced by the introduction of antibodies into individuals from an outside source. immunity is acquired immediately. no contact with pathogen/s needed. short term immunity: antibodies aren't replaced when broken down, memory cells not formed. e.g. anti-venom what is active immunity and how is it produced? - ANSWER produced by stimulating the production of antibodies by the individuals own immune system. contact with pathogen/s...

WSU Biology 106 Exam Questions AND CORRECT DETAILED ANSWERS Which of the follow statements concerning the is NOT correct? a) in the most-recent 550 million years Earth has experienced five mass-extinction events b) approximately 250 million years ago all of the continents were coalesced in a single, giant, super continent c) the first living organisms were Prokaryotes d) oxygen started accumulating in Earth's atmosphere with the invasion of land by plants approximately 400 million y...

BOT3015 Final 2024 Exam Answers All Correct In woody plants the cork cambium produces new tissues that increase the girth of the stem. When this happens the epidermis is sloughed off and replaced by the -ANSWER- periderm What is the function of phloem in plants -ANSWER- food conduction all components of phloem -ANSWER- sieve-tube members, companion cells What is the main function of xylem in plants -ANSWER- to transport water and minerals throughout the plant The outermost cell l...

BIO112 Spring 2024 Exam 1 Terms radiometric dating - ANS general approach used to determine the age of specimens using the rate of decay of radioactive isotopes radiocarbon dating - ANS a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14 potassium-40 dating - ANS radiometric dating method often used in the assessment of volcanic intrusions in sedimentary layers. It is based on measurement of the prod...

BIO 152 EXAM 4, questions and answers with rated solution Autotrophs organism that can use raw materials from environment to assemble its own carbon based molecules (green plants and bacteria) Heterotrophs consuming other organisms to obtain essential molecules (animals) light reaction part one of photosynthesis that absorbs energy from light, and transfers it to energy carrier molecules calvin cycle part two of photosynthesis that receives the transferred energy and ...

University of Minnesota: BIOL 1901 Biology 150 Notes Properties of organisms: o Highly ordered o Use energy o Genetic information o Reproduce o Composed of cells • (about) ~ 1.5 million species named • Up to 100 million total species • Classified into 3 domains or 6 kingdoms o Kingdoms: Plantae, fungi, Animalia, Protista, Eubacteria, Archaebacteria o Domains: Archaea, Bacteria, and Eukarya CELL THEORY • All living organisms are composed of one or more cells. • ...

Resolution - ANSWER-Ability of a microscope to distinguish two objects as separate What do you call a measurement of 10^-6 m? - ANSWER-Micrometer, or micron Light Microscope - ANSWER-microscope that uses a beam of light passing through one or more lenses to magnify an object What resolving power does a light microscope have? - ANSWER-0.25 micrometers Types of Light microscopes (4) - ANSWER-- Simple (Dissecting) - Compound (What we use in lab to view slides regularly) - Dark Field (...

University of Minnesota: BIOL 1901 Biology 150 Notes Properties of organisms: o Highly ordered o Use energy o Genetic information o Reproduce o Composed of cells • (about) ~ 1.5 million species named • Up to 100 million total species • Classified into 3 domains or 6 kingdoms o Kingdoms: Plantae, fungi, Animalia, Protista, Eubacteria, Archaebacteria o Domains: Archaea, Bacteria, and Eukarya CELL THEORY • All living organisms are composed of one or more cells. • ...

Which of the following documents is utilized for correspondence between the A/E or Owner and the Contractor? - ANSWER-Formal Business Letter Which of the following documents is used for correspondence between the home office and the job site? - ANSWER-Memorandum What is the best time to distribute the Working Agenda to the Participants? - ANSWER-About one day prior to the meeting Which document describes the Suggested Agenda for the Preconstruction Meeting? - ANSWER-General Requiremen...