Biology question and answers for June 30, 2024
- Q A DNA sample gave a purity ratio of 1 That means that the sample is Pure DNA O Contaminated with proteins Contaminated with lipids Contaminated with carbohydrates
- Q The reliable absorption range of a spectrophotometer is O Oo 0 5 1 0 0 1 0 0 1 1 0 0 01 1 0
- Q The best tool to measure 346 L microliters O A PTP plastic transfer pipette A 1 1000 L micropipette A 5 50 L micropipette A 20 200 L micropipette
- Q Kate made a solution that needs to be at a pH of 12 The solution has a pH of 5 8 What should Kate do Add drops of HCl until...
- Q The absorbance of a sample as measured by UV visible spectrometry is inversely proportional to the concentration of the sample such that as the concentration increases the absorbance decreases True...
- Q Molarity is defined as the number of moles of solute that are dissolved in 1 mL of solution True False
- Q There are 100 1000 10 1 ml in 1 L
- Q The best tool to measure 146 l solution is O P 200 P 2 P 1000 P 20
- Q erg law is a logical consequence of Mendel s first law of segregation and expresses the tendency toward equilibrium inherent in Mendelian heredity Let us select for our example a...
- Q 17 Assume that you are sampling a trait in animal populations the trait is controlled by a single allelic pair A and a and you can distinguish all three phenotypes...
- Q How do sedimentary rocks differ from igneous and metamorphic rocks Sedimentary rocks are made from the weathered materials of previously existing rocks Sedimentary rocks crystallize from molten rock O Sedimentary...
- Q Limestone forms through the precipitation of calcite on the seabed or a lake bed O True O False
- Q Breccia is well sorted O True O False
- Q Sedimentary rocks form through a sequence of events I don t list all the steps in the choices below but I list most of them Choose the answer that lists...
- Q Conglomerate has rounded grains True O False
- Q Detrital sedimentary rocks differ from chemical sedimentary rocks in that detrital sedimentary rocks form by chemicals precipitating on the the sea floor or a lake bed True False
- Q Match the term with its definition endosymbiotic theory germ theory of disease spontaneous generation cell theory Choose cells are the fundamental units of organisms life arises from non life disease...
- Q Which of the following is a difference between prokaryotic and eukaryotic plasma membranes prokaryotic plasma membranes have a lipid bylayer while eukaryotic plasma membranes do not O prokaryotic plasma membranes...
- Q Eukaryotic cell walls contain peptidoglycan O True False
- Q Which of the following external structures can help prevent a bacterium from being destroyed by phagocytosis O flagella O pili O capsule O fimbriae
- Q Which of the following structures are used by some bacteria as they transfer DNA between bacterial cells O pili flagella fimbriae capsule
- Q Which of the following types of cell walls is are made up of many layers of peptidoglycan none of the choices are correct O acid fast O Gram negative O...
- Q What is the name of the waxy lipid found in the cell wall of acid fast bacteria O teichoic acid O lipid A O mycolic acid Olipopolysaccaride
- Q How would you describe streptococci O cluster of circles Ochain of circles Ochain of spirals
- Q What is contained within the nucleoid O a chromosome O ribosomes O lipids proteins
- Q Which of the following is small circular piece of DNA independent of the bacterial chromosome O ribosome O endospore O inclusion O plasmid
- Q Which of the following is a survival structure made by members of the genera Bacillus and Clostridium O nucleoid O ribosome O endospore O inclusion
- Q Which of the following structures controls what enters and exits a cell O capsule Ocell wall O flagella O plasma membrane
- Q If a cell were placed in a hypertonic solution what direction would water move O the water would flow in and out of the cell equally O the water doesn...
- Q Which of the following structures serves as the site for protein synthesis O plasma membrane O nucleoid O inclusions ribosomes
- Q 1 Interpret these data and explain how they relate to natural selection and the definition of evolution 3 points
- Q Distinguish between convergent evolution and divergent evolution
- Q Which of the following is a distinguishing characteristic of a prokaryotic cell O DNA is double stranded O has a cell wall O does not contain a nucleus O contains...
- Q 2 An observer suggested that during drought years all the seeds were large and tough to open This meant that birds exercised their beaks more making the beaks stronger Is...
- Q True or False All prokaryotes are unicellular True O False
- Q Genetic drift may occur when a small group of individuals colonize a new habitat True O False
- Q The fossil record although incomplete provides evidence about the history of life and illustrates that most species have remained unchanged over time O True False 1 p
- Q According to Lamarck geological forces acting today are the same ones that have been acting in the past O True O False
- Q Evidence that the surface of a mountain was once under the sea includes the presence of marine fossils on the mountain True False
- Q In natural selection humans rather than the environment select the variations of traits to be passed to offspring O True O False
- Q In Charles Darwin s time many people thought that Earth and its living things were formed about a few thousand years ago True False
- Q A lack of mutations that introduce new alleles into a population is one condition of genetic variation O True False 1 po
- Q An epidemic killed a large proportion of a population of deer in California thereby reducing the gene pool This is an example of directional selection genetic isolation the bottleneck effect...
- Q Which of the following does not produce evolutionary change genetic drift gene flow directional selection none of the above
- Q Which of the following ideas was developed by Thomas Malthus Peppered moths living near English industrial cities provide a good example of evolution All above 1 point The diversity of...
- Q Darwin s primary contribution to biological theory was the idea that 1 point an important mechanism of biological evolution is natural selection new alleles arise through mutation evolution is the...
- Q The most prevalent form of evolution and the one proposed by Darwin is 1 saltation gradualism macroevolution O punctuated equilibrium
- Q Individuals that are well adapted to their environment will survive and produce fewer mutations more offspring stronger genes better traits
- Q An example of mimicry would be a butterfly that resembles a leaf Otwo species of frogs one poisonous that resemble one another in coloratio a minnow with spots that look...
- Q Gene flow is the exchange of genes during fertilization the movement of genes between species populations the migration of species populations to new areas mating between close relatives
- Q Microevolution can be thought of as 26 changes in the frequencies of alleles in a gene pool genes mutating in response to environmental change creating new species where none existed...
- Q Genetic drift is O generational fluctuations in gene frequencies that produce no effect O the effect of mutations as they spread through neighbouring populations O changes due to interbreeding with...
- Q The concept of genetic bottlenecks includes which of the following a loss of genetic diversity in descendent populations extensive gene flow sharing of genetic material between two populations O increased...
- Q The example of the peppered moths living near English industrial cities demonstrates that 1 point a change in an environment can result in the evolution of species living there evolution...
- Q Genetic drift is most powerful in O small populations Olarge populations O changing environments
- Q Oxygen dissociation curve exit ticket The graph below shows the oxygen dissociation curve at a low CO2 concentration Oxygen saturation 100 50 DO a Outline the main changes in the...
- Q Contrast the probability of these two different tissues being preserved as fossils
- Q Describe the depositional environment of where this creature might get buried and fossilized
- Q A paleontologist finds a locality that yields many different kinds of mammal and reptile fossils The absence of insect fossils at a fossil this locality indicates that O Insects didn...
- Q Depositional environment describes O the sorting of sediment O the grain size of sediment O the mass of the sediment O the physical environment at the site of deposition the...
- Q The fossil in the figure below represents a trace fossil Correct this statement and explain why this example is not a trace fossil
- Q Replacement describes soft tissue being compressed and blackened minerals precipitating into the pore spaces of tissue the dissolution of organismal tissue and minerals precipitating in their place an impression of...
- Q Which choice describes the steps in the formation of a fossil in the correct order erosion of sediment alteration burial in sediment O burial in sediment alteration erosion of sediment...
- Q Give an example of an advance in biotechnology that you have heard about in the news or read about in this chapter Explain the benefits of the application of biotechnology...
- Q day I want to talk about Mating Position in Bombay Night Frogs An Unconventional Approach 1 Our exploration today delves into the Bombay Night Frog Nyctibatrachus humayuni and its unique...
- Q 1 Fungi are multicellular but the cells walls are for the most part lacking between cells These series of cells between which cytoplasm may flow freely are called hyphae see...
- Q 1 Examine the moss sample which is a bryopsid Also examine the individual mess plant under the binocular scope Sketch it and estimate the length from green to tip to...
- Q 1 Is Brown Algae more closely related to Slime Molds or Dinoflagellates
- Q Are molluscs more closely relate to arthropods or to chordates
- Q Do Cnidarians display radial or bilateral anatomical symmetry Bilateral means two sides which are mirror images of each other our bodies for example radial is just what it sounds like...
- Q Annelids are most commonly known worms Are Annelids more closely related to Mollusca or to Arthropoda
- Q These are sponges Sponges when alive are little more than a bunch of similar cells that decided to live close together There are only a few different types of cells...
- Q ermata Echinoderms include sand dollars and sea urchins and sea stars Are Echinoderms more closely related to Chordates or Arthropods
- Q Chordata Chordates have a central nerve cord running down their backs Many also have a backbone surrounding this cord of nerves Name three chordates with which you are familiar other...
- Q Arthropoda Arthropods include insects and scorpians and spiders An evolutionary novelty of Arthropods i an exoskeleton i e body armor made of chitin an organic material List two possible uses...
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