Junior Science Olympiad Quiz 7 & 8 (Eng)

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Junior Science Olympiad Quiz 7 & 8 (Eng)


Junior Science Olympiad Quiz 7 & 8 (Eng)Versión en línea Biology, Chem, Earth, Phys quiz por RIZQI - BEKASI 1 1) The main role of the heat in this Pasteur experiment was: a B. To provide a source of energy for the growth of microorganisms b D c A. To add bacteria to the flask d C. To regulate the temperature of the broth for the effective growth of microorganisms 2 2) Which of the statements below best describes the specific purpose of setup II in Pasteur's experiment? a D. To test whether bacteria will grow in the medium if bacterial cells are not allowed to reach the medium at all b A. To test whether bacteria is the microorganism which grows in the medium c B d C. To test whether bacteria in the neck of the flask can enter the solution and hence grow in the medium 3 3) Condors have evolved to have almost no feathers on their head and upper neck. Based on its appearance and lifestyle, what is the most likely benefit of this adaptation? a D b B. Greater visibility to spot and hunt prey from a great distance c C. Greater appeal of males to mating females and hence greater chance of reproductive success d A. Reduced air resistance and hence ability to reach high heights when flying 4 4) Based on the phylogenetic diagram, which statement is most accurate? a D. Diprotodontia is the only branch relating to Australian marsupials b A c C. Of all branches, Diprotodontia shows the greatest genetic difference to Australian marsupials d B. The branches Dromiciops and Notoryctes are more closely linked to each other than Isoodon and Notoryctes 5 5) The best explanation for the widespread and diverse occurrence of marsupials in Australia is that a C. An extinction event wiped out marsupials elsewhere but created opportunities in Australia b D. Introduction of non-native mammals forced marsupials to adapt in Australian ecosystems c B. They were introduced by early colonial settlers d A 6 6) Trilobites classification debate highlights which of the following about taxonomy? a A. It reflects disagreements about the number of species within the phylum b B c D. It shows that trilobites have always been classified as a single species d C. It indicates that morphological features of trilobites are not useful for classification 7 7) Based on the information about red foxes and related canids, which statement is least accurate? a C. Dingoes are genetically more similar to the grey wolf than to the red fox b A. Dingoes and domesticated dogs evolved from grey wolves, either separately or via a common ancestor c D. Domesticated dogs are likely to be able to reproduce with dingoes but not with foxes to produce viable young d B 8 8) In the food web, which statement about the given Gulf of Naples food web is LEAST correct? a C. The number and type of phytoplankton increases in high nutrient conditions b D c A. An increase in microzooplankton would cause a decrease in picoplankton and phytoplankton and an increase in mesozooplankton d B. Overfishing small fish would cause mesozooplankton to increase and pressure lower levels 9 9) Which statement about the food chain and energy pyramid is correct? a D. Secondary consumers store more energy than primary producers b B. Primary producers pass on most energy to primary consumers c C d A. Decomposers receive most of the energy 10 10) Which feature would you most expect to see in muscle cells, given their need to undertake a large amount of work? a D. A large cell membrane b A c B. A large number of ribosomes d C. A large number of nuclei 11 11) Which statement matches the cell type to an incorrect structural feature linked to its function? a C. Epithelial cell – Small cells which are easy to replace from lower layers if upper layers are damaged b D c A. Nerve cell – Cell body branched into dendrites to receive signals d B. Red blood cell – Absence of nucleus which creates more capacity for carrying oxygen 12 12) Which advantage and disadvantage correctly identify coral reproductive strategies? a B. Advantage of sexual reproduction - greater genetic diversity. Disadvantage of fragmentation - limits spread b C. Advantage of sexual reproduction - requires more energy. Disadvantage of sexual reproduction - relies on gametes joining c D d D. Advantage of asexual reproduction - beneficial traits passed on; Disadvantage - limited genetic diversity e A. Advantage of fragmentation - results in the genes from healthiest part of the coral forming offspring. Disadvantage of sexual reproduction - traits from two corals expressed 13 13) Which statement is true about the diagram showing pigments and light absorption? a D. Chlorophyll b and β-carotene b B. Chlorophyll a and Chlorophyll b c A d C. Chlorophyll a and β-carotene 14 14) This diagram represents which of the following because there is more than one type of atom making up each molecule? a D. An element b F. A solution c B. A compound d C. A mixture e A f E. A pure substance 15 15) Read the statements about the pictures. Which statements are true? a B. I and II b C c E. None are true d A. I only e D. All are true

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Junior Science Olympiad Quiz 7 & 8 (Eng)

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Junior Science Olympiad Quiz 7 & 8 (Eng)Versión en línea

por RIZQI - BEKASI

1) The main role of the heat in this Pasteur experiment was:

2) Which of the statements below best describes the specific purpose of setup II in Pasteur's experiment?

3) Condors have evolved to have almost no feathers on their head and upper neck. Based on its appearance and lifestyle, what is the most likely benefit of this adaptation?

4) Based on the phylogenetic diagram, which statement is most accurate?

5) The best explanation for the widespread and diverse occurrence of marsupials in Australia is that

6) Trilobites classification debate highlights which of the following about taxonomy?

7) Based on the information about red foxes and related canids, which statement is least accurate?

8) In the food web, which statement about the given Gulf of Naples food web is LEAST correct?

9) Which statement about the food chain and energy pyramid is correct?

10) Which feature would you most expect to see in muscle cells, given their need to undertake a large amount of work?

11) Which statement matches the cell type to an incorrect structural feature linked to its function?

12) Which advantage and disadvantage correctly identify coral reproductive strategies?

13) Which statement is true about the diagram showing pigments and light absorption?

14) This diagram represents which of the following because there is more than one type of atom making up each molecule?

15) Read the statements about the pictures. Which statements are true?