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Approximately 2% of all people have what eye color?
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Approximately 2% of all people have what eye color?

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I. Basking by desert lizards in sun
I. Hiding in burrow by some animals
II. Thermal gaping
Above are the examples of
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  2. Behavioural adaptation
  3. Fossorial adaptation
  4. Scansorial adaptation
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Organisms and Populations

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Question 2
Easy
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The most important of the symbiotic nitrogen fixing bacteria, which forms nodules on the roots of legume plants is
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Question 3
Easy
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Which of the following expresses Mendel's law of equal segregation?
  1. All dominant alleles of different genes segregate into separate cells from the recessive alleles.
  2. Two copies of a gene separate during meiosis and end up in different gametes.
  3. When gametes form, the genes originally from one parent all end up in different gametes from the genes originally from the other parent.
  4. Gametes with recessive alleles will fuse only with each other.
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Principles of Inheritance and Variation

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Dr. Ali Objective Biology

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Question 4
Easy
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In human all the three germ layers are originated from
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  2. Inner cell mass
  3. Both (a) and (b)
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(E) Continue temporal summation. Which is the most accurate regarding the nicotinic receptor? (A) fiber. (B) myofiber. (C) fiber (a) fiber. (E) myofiber. 55. 56. The nicotinic receptors are located on the (A) Dendrite (B) Cell Body (C) Axon Hillock (D) Terminal Boutons (E) Both C&D. 57. Which of the following statements about the Na/K pump is false? (A) It transports Na out of the cell and K into the cell. (B) It is constantly active in all cells. (C) Its activity requires the expenditure of metabolic energy. (D) It transports Na and K in a 1:1 ratio. (E) All of the above are true. 58. The term that describes what happens on a neuron as an impulse is conducted along it is (A) Polarization-Depolarization. (B) Depolarization-Repolarization. (C) Ionization-Depolarization. (D) Hypopolarization. (E) Transpolarization. 59. Which of the following steps in starting an action potential occurs first? (A) An influx of sodium. (B) An outflux of potassium. (C) An outflux of sodium. (D) An influx of potassium. (E) An influx of both potassium and sodium. 60. A synapse is a junction between: (A) Two neurons. (B) A neuron and a muscle cell. (C) A neuron and a glandular cell. (D) All of the above are true. (E) None of the above. 61. This protects the brain by preventing the movement of harmful substances and pathogens from the blood into the brain tissue. (A) Dura mater. (B) Arachnoid mater. (C) Cerebrospinal Fluid. (D) Blood Brain Barrier. (E) All of the above. The neuroglial cell associated with enhancing the synaptic communication between neurons is (A) Astrocyte. (B) Ependymal. (C) Microglia. (D) Schwann Cell. (E) None of the above. A neuron innervating your bicep muscle would be considered part of the (A) Central nervous system. (B) Peripheral nervous system. (C) Autonomic nervous system. (D) Sympathetic nervous system. (E) Parasympathetic nervous system. Which of the following connects sensory and motor neurons? (A) Afferent neurons. (B) Efferent neurons. (C) Interneurons. (D) Astrocytes. (E) Microglial Cells.
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*PLEASE ANSWER* The stored energy in organic matter is released during burning. Which energy sources can be used to produce electricity in this way? a.) wind and geothermal heat b.) sunlight and water c.) sunlight and nuclear power d.) fossil fuel and biofuel
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Biology

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Which abbreviation refers to the fluid found in the ventricles and within the meninges of the brain and spinal cord?
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Biology

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Question 4
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Please place the items in the correct bins with explanations: Actions involving nitrogen that bacteria perform include: Nitrogen fixation: This is the process by which certain bacteria convert atmospheric nitrogen (N2) into a form that can be used by plants and other organisms. Examples of bacteria that perform nitrogen fixation include Rhizobium and Azotobacter. Nitrification: This is the process by which certain bacteria convert ammonia (NH3) into nitrite (NO2-) and then into nitrate (NO3-). Examples of bacteria that perform nitrification include Nitrosomonas and Nitrobacter. Denitrification: This is the process by which certain bacteria convert nitrate (NO3-) back into atmospheric nitrogen (N2). Examples of bacteria that perform denitrification include Pseudomonas and Paracoccus. Obligate anaerobes: These are microorganisms that can only survive and grow in the absence of oxygen. They are typically involved in denitrification. Facultative anaerobes: These are microorganisms that can survive and grow in both the presence and absence of oxygen. They can perform various nitrogen-related processes, including nitrogen fixation, nitrification, and denitrification. Microbes that oxidize inorganic compounds: These are chemolithotrophs, which obtain energy by oxidizing inorganic compounds. Some chemolithotrophs are involved in nitrification. Chemoorganotrophs: These are microorganisms that obtain energy by oxidizing organic compounds. They can also perform various nitrogen-related processes. Please drag the appropriate items to their respective bins.
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Biology

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Question Text
Approximately 2% of all people have what eye color?
TopicAll topics
SubjectBiology
ClassClass 12