Obj 2 & 3.

Name: Obj 2 & 3.
Uploaded: 2017-08-12T06:19:23+00:00
Duration: PTM18S10
Channel: Augustine Henderson
Description: Obj 2 & 3.

Obj 2 & 3

Question 1 A scientist is classifying organisms. One type of organism is classified as a protist. Another type of organism is classified as a eubacterium. What is definitely different about the two organisms?

Question 1 A scientist is classifying organisms. One type of organism is classified as a protist. Another type of organism is classified as a eubacterium. What is definitely different about the two organisms? One is prokaryotic and one is eukaryotic.

Question 2 What is the difference between a prokaryotic and an eukaryotic cell?

Question 2 What is the difference between a prokaryotic and an eukaryotic cell? A prokaryotic cell has no defined nucleus.

Question 3 In the late 1800’s, Overton discovered that substances that dissolve in lipids pass more easily into the cell than those that dissolve in water. How is this explained?

Question 3 In the late 1800’s, Overton discovered that substances that dissolve in lipids pass more easily into the cell than those that dissolve in water. How is this explained? Cells are surrounded by a lipid membrane.

Question 4 What is the function of the ribosomes in a cell?

Question 4 What is the function of the ribosomes in a cell?
To make proteins for the cell

Question 5 What happens during lysogeny or the lysogenic cycle?

Question 5 What happens during lysogeny or the lysogenic cycle?
A virus injects its genes into the host's.

Question 6 What are antigens?

Question 6 What are antigens?
Proteins or chemicals that cause the body to make antibodies.

Question 7 What type of bacteria causes food poisoning and typhoid fever?

Question 7 What type of bacteria causes food poisoning and typhoid fever? salmonella bacteria

Question 8 You collected data across the United States and noticed that the death rate went down after penicillin became available. Assuming there actually was a connection between the two events, how might you explain your data?

Question 8 You collected data across the United States and noticed that the death rate went down after penicillin became available. Assuming there actually was a connection between the two events, how might you explain your data? Penicillin was an effective treatment for bacterial infections.

Question 9 The difference between a prokaryotic and an eukaryotic cell is that the prokaryotic cell has?

Question 9 The difference between a prokaryotic and an eukaryotic cell is that the prokaryotic cell has? no membrane-bound nucleus

Question 10 Which of these organelles is found ONLY in plant cells?

Question 10 Which of these organelles is found ONLY in plant cells?
Chloroplasts

Question 11 Cells used in the production of proteins have many ribosomes, whereas cells used in digestion have many mitochondria. What is the most likely reason these two cells differ in their makeup?

Question 11 Cells used in the production of proteins have many ribosomes, whereas cells used in digestion have many mitochondria. What is the most likely reason these two cells differ in their makeup? Ribosomes aid in the production of proteins, whereas mitochondria provide energy used for digestion.

Question 12 Most nerve cells have extensions known as dendrites extending from the cell. Why are dendrites only features of nerve cells?

Question 12 Most nerve cells have extensions known as dendrites extending from the cell. Why are dendrites only features of nerve cells? Other cells in the body have functions that do not require dendrites.

Question 13 Arrange the levels of organization of multi-celled life forms from the MOST complex to the simplest.

Question 13 Arrange the levels of organization of multi-celled life forms from the MOST complex to the simplest. organism---organ systems---organs---tissues---cells

Question 14 Except for the heart, human internal organs are lined with?

Question 14 Except for the heart, human internal organs are lined with? smooth muscles.

Question 15 Every cell contains DNA. The main purpose of DNA is to store the cell’s genetic information. How does DNA control the cell?

Question 15 Every cell contains DNA. The main purpose of DNA is to store the cell’s genetic information. How does DNA control the cell? DNA determines what proteins are made.

Question 16 Which part of the DNA strand is the phosphate group?

Question 17 The DNA of a cell remains in the nucleus of the cell. What molecule carries the information from the nucleus of a cell through the cytoplasm to other organelles where proteins are made?

Question 17 The DNA of a cell remains in the nucleus of the cell. What molecule carries the information from the nucleus of a cell through the cytoplasm to other organelles where proteins are made? RNA

Question 18 The first step in DNA replication occurs when the DNA molecule separates into two strands. What is the next step in DNA replication?

Question 18 The first step in DNA replication occurs when the DNA molecule separates into two strands. What is the next step in DNA replication? Enzymes produce two new complementary strands.

Question 19 A change in genetic material that produces a variation in a species may be a result of—

Question 19 A change in genetic material that produces a variation in a species may be a result of— Mutation

Question 20 Genetic mutations drive changes in a population. Which one of the following statements is true about mutations?

Question 20 Genetic mutations drive changes in a population. Which one of the following statements is true about mutations? mutations can have a positive or negative effect on an organism

Question 21 The plant developmental process is different from that of an animal in that the plant?

Question 21 The plant developmental process is different from that of an animal in that the plant? continues to grow throughout its life.

Question 22 Sex-linked genes are located on ? .

Question 22 Sex-linked genes are located on ?
the X-chromosome in most cases.

Question 23 There are two types of reproduction: sexual and asexual. Each has its benefits. What is one benefit of asexual reproduction?

Question 23 There are two types of reproduction: sexual and asexual. Each has its benefits. What is one benefit of asexual reproduction? It has exponential growth potential.

Question 24 Scientists have discovered a type of fungi that is genetically identical to fossilized fungi from 460 million years ago. How is it possible that these modern fungi have the same genetic combination?

Question 24 Scientists have discovered a type of fungi that is genetically identical to fossilized fungi from 460 million years ago. How is it possible that these modern fungi have the same genetic combination? They asexually reproduce.

Question 25 What is this and what does it indicate?

Question 25 What is this and what does it indicate? Human karyotype
Male Down Syndrome

Question 26 In a dihybrid cross, what is the proportion of offspring with both recessive traits?

Question 26 In a dihybrid cross, what is the proportion of offspring with both recessive traits? 1/16

Question 27 A scientist is studying the fossils of different species of monkey. What information would the scientist be most likely to gain from studying the fossils of monkeys?

Question 27 A scientist is studying the fossils of different species of monkey. What information would the scientist be most likely to gain from studying the fossils of monkeys? how the size of the monkey brain changed over time

Question 28 A scientist discovers the fossilized backbone of an ancient whale. What would the scientist be able to conclude most accurately about the whale?

Question 28 A scientist discovers the fossilized backbone of an ancient whale. What would the scientist be able to conclude most accurately about the whale? its size

Question 29 Scientists have discovered bacteria that can survive in the hot temperatures found in the lava of volcanoes. Which statement best explains how bacteria could survive in this environment?

Question 29 Scientists have discovered bacteria that can survive in the hot temperatures found in the lava of volcanoes. Which statement best explains how bacteria could survive in this environment? Bacteria have mutated and those suited to the environment survive there.

Question 30 Why is this important?

Question 30 It allows the great diversity of living things to be classified and organized.

Question 31 Which of the following sequences demonstrate the levels of organization of an organism?

Question 31 Which of the following sequences demonstrate the levels of organization of an organism? chemicals----cells----tissues----organs----systems----organism

Question 32 A scientist has discovered a new organism. The scientist wants to find out if the organism is a fungus or a plant. What information would be best for the scientist to find out?

Question 32 A scientist has discovered a new organism. The scientist wants to find out if the organism is a fungus or a plant. What information would be best for the scientist to find out? whether the organism produces food by photosynthesis

Question 33 The similarity between proteins, fats, and polysaccharides is that they are all made up of monomers that ?

Question 33 The similarity between proteins, fats, and polysaccharides is that they are all made up of monomers that ? combine together to form polymers via a condensation process.

Question 34 The products of photosynthesis become the reactants in—

Question 34 The products of photosynthesis become the reactants in—
aerobic cellular respiration

Question 35 A factor that affects an enzyme’s ability to work efficiently is—

Question 35 A factor that affects an enzyme’s ability to work efficiently is— shape

Question 36 In a simple oceanic food chain, phytoplankton, which obtain their energy by photosynthesis of light from the Sun, are eaten by small shrimp, which are then eaten by whales. However, the amount of energy that the phytoplankton have obtained from the Sun is far greater than the amount of energy available to the whales. Which of the following provides the best explanation for this loss of energy?

Question 36 In a simple oceanic food chain, phytoplankton, which obtain their energy by photosynthesis of light from the Sun, are eaten by small shrimp, which are then eaten by whales. However, the amount of energy that the phytoplankton have obtained from the Sun is far greater than the amount of energy available to the whales. Which of the following provides the best explanation for this loss of energy? There is a loss of useful energy in the form of heat at each stage of the food chain.

Question 37 The heart, the blood vessels, and the lungs all work together to deliver oxygen to the cells of the body. Which structural level does this describe?

Question 37 The heart, the blood vessels, and the lungs all work together to deliver oxygen to the cells of the body. Which structural level does this describe? system

Question 38 Trace the traveling pathway of an impulse that is being transmitted in the peripheral nervous system of a mammal.

Question 38 Trace the traveling pathway of an impulse that is being transmitted in the peripheral nervous system of a mammal. from the sense organs----central nervous system----muscles or the glands

Question 39 Leaf cells of a plant contain a special type of photosynthetic cells called ?

Question 39 Leaf cells of a plant contain a special type of photosynthetic cells called ? parenchyma.

Question 40 A mammal is able to maintain its body temperature partially by the proper functioning of these organs ?

Question 40 A mammal is able to maintain its body temperature partially by the proper functioning of these organs ? liver, kidney, and skin

Question 41 A snail lives in an ever changing environment, and even the vibration of a nearby footstep can cause it to retract into its shell. Why does the snail retract?

Question 41 A snail lives in an ever changing environment, and even the vibration of a nearby footstep can cause it to retract into its shell. Why does the snail retract? The snail is reacting to external stimuli.

Question 42 Why do mice get fatter on sugar coated seeds rather than normal seeds?

Question 42 Why do mice get fatter on sugar coated seeds rather than normal seeds? The sugar-coated seeds contain more energy, so excess energy could be stored as fat.

Question 43 Bacteria are important in the nitrogen cycle. What important role do nitrogen-fixing bacteria play? .

Question 43 Bacteria are important in the nitrogen cycle. What important role do nitrogen-fixing bacteria play? They change nitrogen gas into nitrates.

Question 44 The carbon cycle is very important to all biotic and abiotic factors in an ecosystem. Why is this cycle so essential to all living members of an ecosystem?

Question 44 The carbon cycle is very important to all biotic and abiotic factors in an ecosystem. Why is this cycle so essential to all living members of an ecosystem? Plants remove carbon from the air and use it to make food and oxygen in photosynthesis.

Question 45 The roots of a mistletoe plant absorb nutrients from living oak trees causing some damage to the tissues of the trees. This is an example of—?

Question 45 The roots of a mistletoe plant absorb nutrients from living oak trees causing some damage to the tissues of the trees. This is an example of—? parasitism

Question 46 An Arctic tundra is an area where the subsoil remains frozen throughout the year. What does this prevent from growing in the area?

Question 46 An Arctic tundra is an area where the subsoil remains frozen throughout the year. What does this prevent from growing in the area? trees

Question 47 A species of rabbit is introduced into a new area. After ten years, the population of rabbits has increased and the rabbits are a major pest. What does this indicate about the environment the rabbit was introduced into?

Question 47 A species of rabbit is introduced into a new area. After ten years, the population of rabbits has increased and the rabbits are a major pest. What does this indicate about the environment the rabbit was introduced into? The environment had few predators before the rabbits.

Question 48 A town is located on the banks of a small lake that contains a food chain of mosquitoes, frogs, and owls. After a particularly bad season for mosquito bites, the people in the area decide to treat the lake with a pesticide to kill mosquitoes. Which of the following is the most likely result for the lake ecosystem?

Question 48 Less frogs…..less owls……dead mosquitoes…messes with entire food chain…..poison….

Question 49

Question 50

Question 51

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