Answers created by Rawda Eada

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• Why is the concentration of glucose in the glomerular filtrate normally similar to the concentration in the blood plasma?
  
• What type of molecule serves as the inorganic carbon reservoir for photosynthesis?
  
• Where do you think the sodium-potassium pumps are made in the cell, and how do you think they become inserted into the lipid bilayrer of the plasma membrane?
  
• What is the shape of a nucleic acid?
  
• If you cover the tip of a shoot in opaque black aluminium foil, towards which direction does the shoot grow? Or does it even grow at all?
  
• Question #6b24a
  
• Describe the two factors that influence the rate of impulse propagation?
  
• Question #89a00
  
• How do organisms in an ecosystem interact?
  
• During mitosis, are the genes of the daughter cells identical or different?
  
• What is the only possible genotype in which a recessive allele would show?
  
• Where does the central nervous start and where does it end?
  
• What are the two cell division stages in the mitotic phase of the cell cycle?
  
• When do chromosomes duplicate for meiosis?
  
• What's the difference between PCR and DNA sequencing?
  
• Why does water cycle keep on going?
  
• What is the difference between noncyclic and cyclic electron flow in terms of the products and the pathways the electrons follow?
  
• What is the role of cellular respiration in a plant?
  
• What causes the lac genes in E.Coli to turn on/off?
  
• How is the lac operon involved in gene expression?
  
• In bacteria, what binds with the repressor to activate the lac operon?
  
• How does an atom of carbon-14 differ from an atom of carbon-12?
  
• How does facilitated transport differ from diffusion?
  
• If the DNA analysis of a gene shows 20% Adenine bases,what would be the percentage of Thymine, Cytosine ,Guanine and Uracil?
  
• Question #25b1d
  
• What is the Role of ATP in photosynthesis?
  
• How does nitrogen cycle through the environment?
  
• What are the ten major organ systems in the body?
  
• What type of nutrient has the highest energy content per gram?
  
• How does meiosis relate to fertilization?
  
• What are the stages of meiosis and which one is most different from mitosis?
  
• What are the names of the four branching blood vessels that supply the heart with blood?
  
• What are carbohydrates made up of?
  
• Why and how do guard cells open and close stomata?
  
• In which body system do the endoplasmic reticulum, ribosomes, vacuoles, golgi complex, cell membrane, cell wall, chloroplasts and mitochondria have similar functions?
  
• What are 4 major differences between mitosis and meiosis?
  
• Why do cells undergo mitosis and meiosis?
  
• In plant cells, what does the vacuole do?
  
• How would you compare and contrast mitosis and meiosis?
  
• Assume that prophase begins with eight chromatids in the nudeus of a cell. When telophase ends, how many chromosomes will be present in each new nucleus?
  
• In meiosis, how does prophase I differ from prophase II?
  
• What is the definition of a pioneer species, and what are some examples?
  
• Which types of neurons conduct nerve impulses from receptors to the central nervous system?
  
• How does meiosis lead to genetic variation and why is this variation important?
  
• What organ system is found only in the thoracic cavity?
  
• Why is water's ability to absorb heat important to aquatic organisms and to life on earth?
  
• Question #5782e
  
• How many legs do spiders have?
  
• What are three types of carbohydrates?
  
• What does meiosis do for a multicellular organism?
  
• Which body system does emphysema effect?
  
• Why is meiosis biologically important?
  
• Question #07938
  
• What are the steps in fat digestion, absorption, and transport?
  
• What is an example of simple diffusion in an organism?
  
• What amino acid sequence would be produced from the mRNA sequence CGCUAUAGC?
  
• What is the function of enzymes?
  
• What happens to the energy at each level as you move up the food pyramid?
  
• How do cell membranes adapt to cold temperatures?
  
• How does temperature affect cell membrane?
  
• In which phase do you see that the spindle fibers have disappeared?
  
• What is amylase? Where is it found? What does it do?
  
• A mitosis inhibitor is a medication that is designed to prevent mitosis in certain cells. Why would these be helpful in the treatment of tumors?
  
• Question #52832
  
• What role do decomposers play in the carbon cycle?
  
• The villi of the small intestine contain many capillaries. Why are the capillaries so important? What is the name of the process of in which nutrients move across the surface cells of the villi into the blood?
  
• Question #0ccd9
  
• In a given community, a grasshopper eats grass, a bird eats the grasshopper, and a cat eats the bird. What is the trophic level of the grasshopper?
  
• What is a nucleic acid monomer and polymer?
  
• Question #18337
  
• What are the 2 types of vascular tissues in plants?
  
• What are 5 cell structures that make a bacteria?
  
• How many chromosomes are in the body cells of an organism that has a haploid number of 8?
  
• Does facilitated diffusion take energy for the cell?
  
• In cellular respiration a reaction between glucose and oxygen forms what three things?
  
• What are polymers and monomers?
  
• Why do muscle cells have more mitochondria than other kinds of eukaryotic cells have?
  
• When is endocytosis used? What typical cell type would be involved?
  
• What are the roles of the liver in maintaining homeostasis?
  
• Genetic disorders can result when sister chromatids fail to separate properly. During which phase is this problem most likely to occur?
  
• What are the 7 characteristics of life?
  
• How is a new yeast cell formed by asexual reproduction similar to its parent cell?
  
• Question #1e3ea
  
• What do all carbohydrates have in common?
  
• How can biotic and abiotic factors work together to control a population's growth?
  
• What are the building blocks of carbohydrates?
  
• How are monosaccharides related to monomers and polymers?
  
• Why does glycerol diffuse across the cell membrane faster than glucose?
  
• What are the raw materials of photosynthesis?
  
• What is the cell membrane and what is its function?
  
• Which type of molecule forms the cell membrane?
  
• If the monomer is amino acid, what is the polymer?
  
• Where does a cell membrane come into contact with water?
  
• How are diffusion and osmosis different?
  
• Will glucose be able to move across a cell membrane by simple diffusion?
  
• How would you describe the chemical reaction that turns monomers into polymers?
  
• What are some causes of global warming?
  
• What are some of the problems of acid rain?
  
• Question #91132
  
• How do the phospholipid molecules control what moves across the plasma membrane?
  
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