Bio Unit Test 1

  1. What are the seven characteristics of life? Using a human as an example, explain how we meet the 7 characteristics of life.
    • 1) Ability to reproduce
    • 2) Maintain Homeostasis
    • 3) Grow and development
    • 4) Hereditary
    • 5) Cell Organization
    • 6) Respond to Environment 
    • 7) Nutrients/Energy for metabolism
  2. What is biotic? Give an example.
    • Biotic is something that is living. 
    • Examples are deer, humans, mice, birds, and other animals/plants.
  3. What are abiotic factors? Give examples.
    • Abiotic factors are things that are not living. 
    • Examples are rocks, dirt, sticks, and other non-existing items.
  4. Why are biotic and abiotic factors important to an ecosystem?
    Biotic and abiotic factors are important to an ecosystem because they help run the ecosystem and create a stable food chain.
  5. What are the different ways things can reproduce?
    Asexually and sexually.
  6. What are the pros and cons of reproducing asexually?
    • Pros: it is much simpler, and you only need a single organism.
    • Cons: reproducing asexually makes exact copies of organisms, if one gets a sickness and dies, all of them can.
  7. What are the pros and cons of reproducing sexually?
    • Cons: you need another organism to reproduce.
    • Pros: if one organism dies from sickness, others have a chance of living since they aren't copies of one another.
  8. What does it mean for an organism to be single-celled?
    A single-celled organism is an organism with one cell, example is bacteria.
  9. How does being single-celled affect lifestyle?
    Being single-celled is much simpler, and reproduction is asexual.
  10. What does it mean for an organism to be multicellular?
    For an organism to have more than one cell, to have multiple.
  11. How does being multicellular affect lifestyle?
    Organisms that are multicellular can have different functions, but all work together in the end to thrive. Reproduction can be sexual and asexual.
  12. What is the definition of homeostasis?
    To have a stable state of condition that is needed for life.
  13. What are three examples of the human body maintaining homeostasis?
    • One, when the body is too hot, it sweats.
    • Two, when the body is too cold, it shivers.
    • Three, the body has glucose homeostasis, maintain a stable state of glucose (sugar).
  14. How does a plant, animal, and fungus respond to stimulus in the environment?
    • Plants, respond to light, and move towards light because of photosynthesis. 
    • Animals, respond to seasonal changes, where in the winters animals like bears will hibernate. 
    • Fungi, can change structure and also where they grow.
  15. What is the function of the nucleus?
    The nucleus controls the cell, stores DNA, and makes copies of DNA into RNA (transcription).
  16. What is the process of transcription and how does it relate to the production of proteins?
    When the nucleus takes DNA and copies it into RNA. This relates to the production of proteins because the RNA blueprint is used to make proteins.
  17. How does the ribosome carry out translation? Mention RNA and amino acids.
    The ribosome uses the RNA blueprint to take the amino acids that are form broken down food, to organize the acids into more proteins.
  18. How is a solar panel and chloroplast similar?
    Both use the sun to create energy.
  19. What role does chloroplast play for plants and algae? How does it relate to the food chain?
    Chloroplast helps plants and algae in photosynthesis, which is their way of getting energy/food. This relates to the food chain because the Sun is the ultimate source of energy, and without photosynthesis to feed plants/algae, there would be no food chain.
  20. What takes place during cellular respiration in the mitochondria?
    Cellular respiration is when sugar (glucose) is broken down into energy, which is stored in the form of ATP.
  21. What does the cell membrane do? 
    Know how to draw a picture of the lipid bilayer.
    The cell membrane regulates what comes in and out of the cell.
  22. What is the ultimate source of energy for life on Earth?
  23. What happens to heat in the food chain?
    More and more heat is lost in the food chain, till eventually most of it goes into the environment.
  24. How do producers (plants, algae, etc) get their nutrients?
    Nutrients comes from the decomposers where they provide nutrients in the dirt or water.
  25. How is nutrients recycled by decomposers?
    Decomposers eat dead animals or other things, and their waste goes into the water or soil with lots of yummy nutrients.
  26. What is the main function of carbohydrates?
    To give glucose (sugar) to the body.
  27. What are good sources of carbohydrates?
    Potatoes, starches, fruit, veggies, wheat, grains, dairy, legumes, corn, rice.
  28. What par to fate cell uses carbohydrates? What process is carried out there?
    The mitochondria uses carbohydrates for cellular respiration.
  29. What is the main function of proteins?
    Keep the cell alive.
  30. What are good sources of proteins?
    Meat, dairy, cheese, fruits, veggies, nuts, eggs, lentils, and soy.
  31. When proteins are broken into amino acids, what part of the cell do they go to and how are they used?
    Once they are broken down into amino acids, they go into the ribosome. The ribosome uses the amino acids to make more proteins for the body using RNA blueprints.
  32. What are the different functions of lipids?
    Maintain hormones, transport fat-soluble nutrients, and store energy.
  33. What are good sources of lipids?
    Butter, avocados, fish, cheese, meats, and nuts.
  34. What parts of a nucleotides stay the same and which parts are different?
    The phosphate and 5 carbon sugar stay the same. The nitrogenous bases are different.
  35. What are the four nitrogenous bases?
    Adenine, Guanine, Thymine, and Cytosine.
  36. How are the four nitrogenous bases used to create the genetic code?
    They create the genetic code by being organized in different variations of nucleotides.
  37. What makes one person's genetic code different from another?
    Everyone has different chromosomes (usually) that gives instructs to the DNA to make certain proteins, and there are infinite amount of variations of combinations.
  38. What is the sequence of the template strand if following the coding strand?
    The template strand is the opposite of the coding strand. Pairing roles.
  39. What is the relationship between DNA's two strand and how it's copied?
    One strand is the coding strand which contains the actually DNA. The other strand is the template strand, which doesn't contain DNA but copies it for other uses. It is copied by unraveling the DNA strand then copying.
  40. What are the key differences between an asexual and sexual organism?
    asexual only needs itself and sexual needs another person. The asexual organism copies it self, while the sexual takes half of its chromosomes with its partner to go to off-spring.
  41. How do key terms like fertilization, sperm, egg, mitosis, and meiosis relate to the life cycle of a sexual organism?
    Fertilization is when sperm and egg meet, and successfully combine. Mitosis is when the parents cell gets copied into a two daughter cells. Meiosis is when the parent cell get divided and copied to the daughter cells, then divided again but the two cells then contain half o the daughter cell.
  42. How do chromosome numbers work with chromosomes found in zygote? Compare the number of chromosomes founded in sperm and eggs. Why are these numbers important?
    There are 46 chromosomes found in a zygote. Both, sperm and eggs have 23 chromosomes each, together you get 46 (a zygote). These numbers are important, because if you do not have 46 chromosomes, children can have things like down syndrome.
  43. When is it necessary for a living thing to copy its DNA?
    Copying DNA is needed when things grow repair, and reproduce. Also, DNA needs to be copied to make RNA.
Card Set
Bio Unit Test 1