(ELSC Grade 11) Earth and Life Science 2nd Quarter Exam

 

Where did Lindeman study the ecosystem concept?WisconsinIntraspecific competition is competition between two individuals from different species.TrueWhat is the ratio used for the precipitation of nucleic acids?2:1Phenotype refers to an organism's genetic makeup.TrueIf a cat always eats the white colored mouse, then there brown colored mouse will increse innumber.TrueCalcium chloride is used in DNA insertion.TrueThe chances of survival of organisms is maximized when they cooperate with one another.TrueEcosystem ecology is the implementation ofSynecologyThe vascular cambium can store water as well aid in wound repair and store carbohydrates.FalseWhen primary producers capture solar energy and produce complex molecules, this is known asGross primary productionYou can a leaf belongs to a _____ because it has parallel veins.MonocotThe Phelloderm is a thin layer of this type of cells.ParenchymaIndirect reciprocity occurs when a species is likely to help another due to lineageTrueWhat are pharyngeal pouches?Throat poucesThese cells have thin and flexible walls and lack a secondary wall.ParenchymaNucleic acids are recovered throughCentrifugationDirect reciprocity occurs when two organisms gain from helping each other.TrueTrichomes function as true roots.FalseThe xylem and phloem in stems and leaves are collectively called a stele.FalseThe enzyme method is also known as the Maxam-Gilbert Method.FalseThese are all mechanisms which cause microevolution, exceptMutationsWhat is the percentage of energy that is passed on to primary consumers?10%Artificial selection occurs when we breed dogs for a certain length of coat or certain height.TrueAn organism is said to be homozygous if it carries two of the same genes.TrueWho was the first one to propose a mechanism for evolution?LamarckThese are all heterozygous genes, exceptAbThese cells share their nucleus with seive tube elements.Companion cellsEnzymes that catalyze reactions will perish at temperatures below 250 KFalseThe cuticle, or the wax, functions to protect against insects and pathogens.TrueThis secretes polysaccharides to protect the young part of the plant.Root capHow many reactions are there in the Sanger-Coulson method?4The vascular cambium in woody plants consists of a layer of this type of cellParenchymaIf a G gene codes for green eyes and a g gene codes for blue eyes, and G is dominant, then a girlwith Gg genes will have green eyes.TruePhosohorous-32 is a medium-energy emitterFalseCarrots have fibrous rootsTrueA snake's pelvis is an example of a vestigial structure.TrueAll plants have secondary growth.FalseThe energy flow of the ecosystem starts with its primary producers.TrueThese cells function in photosynthesisParenchymaThere must be a balance between order and entropy.TrueThe Continental Drift theory provides evidence for evolution.TrueThe stomata allow the uptake of this gas.Carbon dioxideTwo different species can occupy the same niche.FalseWho developed the binomial naming of species?LinnaeusApical meristems are located at the stems of plants.FalsePAGE is suitable for RNA sequencingFalseAffinity chromatography removes all of the following, exceptRNAThese organisms can capture energy without light.ChemoautotrophsA260/280 for pure RNA shoul be2.0The xylem transports water

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