Download UNIT A PAT Practice with Answers

Science 9 ­ Unit A ­ Practice PAT Questions Use the following information to answer the next three questions Use the following information to answer the next question While hiking through a meadow, Kerry spotted a small pond filled with activity. Julie collected data on the structure of the human ear from four members of her class. 1. The mallard ducks that Kerry saw in the pond had leeches, that survive on the mallards blood, living on them. This type of relationship is called. A. Mutualism B. Parasitism C. Competition D. Resource partitioning 2. The pond is an interaction of living and nonliving things. The term that describes the interaction of a typical meadow pond is A. Niche B. Population C. Ecosystem D. Community 3. Which of the following statements about variations within species is ​
false​
? A. Variations help species adapt to changing environments. B. Variations better equip species for survival. C. Variations produce new traits in species. D. Variations make species static. Use the following information to answer the next question Attached lobe Matt Free Lobe Mia Attached lobe Thai Free lobe Despite belonging to a single species, humans show great diversity in terms of the biological and physiological expression of their genetic makeup. This type of variation with a species is seen in many animals but is absent in organisms such as amoebas. The order in which the numbers stages of development occurs is _____, _____, _____, and _____. (Record your answer as a ​
four­digit​
number.) Jen 5. Which of the following two terms describe lobe traits? A. Heritable characteristic and continuous variation B. Heritable characteristic and discrete variation C. Non­Heritable characteristic and discrete variation D. Non­Heritable characteristic and continuous variation 6. Which flower structure produces the male gamete? A. Overy B. Stigma C. Anther D. Ovule Use the following information to answer the next question 3. Embryo 4. Zygote 4. NUMERICAL RESPONSE Type of Lobe A male sperm unites with a female egg to produce a new individual. Some of the terms that describe this process are listed. 1. Fertilization 2. Gametes Name 7. The absence of variation within a species of amoeba is a result of the fact that amoebas A. Are prokaryotic cells B. Do not photosynthesize C. Are unicellular in nature D. Do not reproduce sexually Use the following information to answer the next question The following descriptors are about reproduction: W. Results in variations in species X. Requires specialized reproductive cells Y. Requires a large amount of energy Z. Results in individuals that are genetically identical 8. NUMERICAL RESPONSE In the blanks below identify the statements above as either describing sexual reproduction or asexual reproduction. Use the code: 1 = Sexual reproduction
2 = Asexual reproduction _____ _____ _____ _____ W X Y Z 9. DNA is an important structural component of A. The cell wall B. A chloroplast C. The cytoplasm D. A chromosome 10. Normal human skin cells have 46 chromosomes. The division/formation of human sex cells is referred to as, A. Meiosis, which produces 23 chromosomes B. Mitosis, which produces 23 chromosomes C. Meiosis, which produces 46 chromosomes D. Mitosis, which produces 46 chromosomes 11. Which of the following situations is ​
not​
an example of asexual reproduction? A. A hydra producing a bud B. A plant propagating from a root C. Bacteria dividing by binary fission D. An embryo developing from a zygote Use the following information to answer the next question As a bee pollinates clusia flowers, it becomes covered with a sticky resin that contains a powerful antibiotic. This antibiotic kills bacteria in the beehive. 12. The association of a bee and the clusia flower is an example of A. Parasitism B. Mutualism C. Commensalism D. Heterotrophism 13. Which of the following factors is important for the ensured survival of a species in a changing environment? A. Symbiotic associations B. Interspecies competition C. Variation within a species D. Ability to reproduce asexually 14. DNA does ​
not​
contain A. Nucleotides B. Cytosine C. Guanine D. Uracil 15. Which of the following biomes has the ​
most diverse​
life forms? A. Deciduous forest B. Rain forest C. Grassland D. Tundra 16. The ​
main​
drawback in using hybridized species of plants or animals is that A. The cost of producing them is too high B. They usually fail to grow or live C. Genetic diversity is decreased D. They are unable to reproduce ANSWERS 1.
2.
3.
4.
B C D 2143 5.
6.
7.
8.
B C D 1112 9. D 10. A 11. D 12. B 13. C 14. D 15. B 16. C