Question and answer
1.What was your identification accuracy? 2.Identify at least three types of characteristics that you were asked about as you helped the computer identify a fruit. 3.How is the fruit lab like a
dichotomous key?
In a dichotomous key, [ the user is presented with a sequence of choices between paired statements based on characteristics of the organism. We will practice using a dichotomous key with some items we are familiar with: fruit. To use a dichotomous key, one begins with the first couplet of paired statements, deciding which statement is true for a specimen. The key may then tell you
what organism or group you have, or it may direct you to another couplet. Choose the fruits at your lab bench one at a time and follow the key until you have arrived at an identification for each. 1a. Fruits occur singly ........................................................................... Go to 3 1b. Fruits occur in clusters of two or more ........................................... Go to 2 2a. Fruits are round ................................................................................ Grapes 2b. Fruits are elongate .........................................................................Bananas 3a. Thick skin that separates easily from flesh .................................. Oranges 3b. Thin skin that adheres to flesh ........................................................ Go to 4 4a. More than one seed per fruit .............................................................Apples 4b. One seed per fruit ............................................................................ Go to 5 5a. Skin covered with velvety hairs .....................................................Peaches 5b. Skin smooth, without hairs ................................................................Plums ]
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User: 1.What was your identification accuracy? 2.Identify at least three types of characteristics that you were asked about as you helped the computer identify a fruit. 3.How is the fruit lab like a dichotomous key?

Weegy: In a dichotomous key, [ the user is presented with a sequence of choices between paired statements based on characteristics of the organism. We will practice using a dichotomous key with some items we are familiar with: fruit. To use a dichotomous key, one begins with the first couplet of paired statements, deciding which statement is true for a specimen. The key may then tell you what organism or group you have, or it may direct you to another couplet. Choose the fruits at your lab bench one at a time and follow the key until you have arrived at an identification for each. 1a. Fruits occur singly ........................................................................... Go to 3 1b. Fruits occur in clusters of two or more ........................................... Go to 2 2a. Fruits are round ................................................................................ Grapes 2b. Fruits are elongate .........................................................................Bananas 3a. Thick skin that separates easily from flesh .................................. Oranges 3b. Thin skin that adheres to flesh ........................................................ Go to 4 4a. More than one seed per fruit .............................................................Apples 4b. One seed per fruit ............................................................................ Go to 5 5a. Skin covered with velvety hairs .....................................................Peaches 5b. Skin smooth, without hairs ................................................................Plums ]
akbest|Points 110|

User: List the results of the items you tested. Categorize the items as acids, bases, and neutrals. What were the test results of the lemon juice and baking soda mixture? How do you explain these results? How do acids and bases help living organisms?

Weegy: When lemon juice and baking soda are mixed there will be a chemical reaction. This is cause by the citric acid in the lemon juice and the sodium bicarbonate in the baking soda. [ The result is fizz. How do acids and bases help living organisms? Proteins are important in all aspects of homeostasis (balanced health) in the cells as well as in the organism (living things). Proteins have limited optimal ranges regarding pH and temperature. Acids and bases effect pH levels, so if it becomes too high or too low the proteins will become denatured (no longer work properly) which will have a negative effect on homeostasis. ]
Expert answered|Marvel2|Points 330|

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Asked 5/15/2013 1:01:14 PM
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What were the test results of the lemon juice and baking soda mixture? How do you explain these results? How do acids and bases help living organisms?
Weegy: When baking soda and lemon juice are added together, a chemical reaction occurs. [ The reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) reacting with a base (sodium bicarbonate, more commonly known as baking soda). We can write this reaction as follows: C6H8O7 + 3NaHCO3 Na3C6H5O7 + 3H2CO3 In other words, a molecule of citric acid reacts with three molecules of sodium bicarbonate to form a molecule of sodium citrate and three molecules of carbonic acid. Although an acid is reacting with a base, this is not a neutralization reaction. In a neutralization reaction, the products are water and salt; lemon juice is a weaker acid and baking soda is an organic salt. If you were to measure the pH of a solution containing the products, it would be lower than 7 (acidic). **Aside from their important functions in human physiology, acids and bases are all around us. Lemon juice, which can be used as a cleansing agent and antiseptic, and household vinegar, which has a myriad of uses, are acids, while baking soda is a base. ] (More)
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Asked 5/15/2013 1:05:19 PM
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