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tigry1 [53]
3 years ago
5

Q#5- How do you know when a test is positive for glucose and starch?

Biology
1 answer:
fgiga [73]3 years ago
3 0

You will know a test is positive for glucose and starch when Benedict's reagent will give a positive test result for glucose but not for starch.

Explanation:

  • Benedict's Test is used to test for simple carbohydrates. The Benedict's test identifies reducing sugars which have free ketone or aldehyde functional groups.
  • Food scientists can test for starch in food using iodine solution. If starch is present, the iodine will turn dark blue. Testing for sugar can be performed with Benedict's solution.
  • The Benedict's solution is added to the sample, and heated for five minutes.
  • The test involves heating a solution of the sugar to be tested with Benedict's reagent and observing the colour change of blue to orange. Benedict's reagent will give a positive test result for glucose but not for starch.
  • Benedict's solution can be used to test for the presence of glucose in urine
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Which additional observation would support the conclusion that the deer population is not changing size from year to year, meani
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Answer:

The presence of predators of deer which does not allow increase in the population of deer year after year.

Explanation:

In an forest ecosystem, one animal controls the population of another organisms and thus there is no increase in the population of that organism and the ecosystem is in equilibrium state. The population of deer did not increase due to the presence of predators such as lion, cheetah etc and the net population is 0.

7 0
3 years ago
Neurons may be classified according to several characteristics. Which of the following is correct? A. Group A fibers are mostly
den301095 [7]

Answer:

Option (B).

Explanation:

Neurons or nerve cell are the basic structural and functional unit of the nervous system. Fibers are the thread like long projection of the nerve cells.

Neurons are classified into three fibers- Group A fibers, B fibers and C fibers. The group C fibers cannot capable of doing the saltatory conduction of the nerve impulse because they are unmyelinated.

Thus, the correct answer is option (B).

3 0
3 years ago
Which epidermal layer is closest to a blood supply.
Ede4ka [16]

Answer:

Stratum Basale

Explanation:

It is the layer that's closest to the blood supply lying underneath the epidermis.

4 0
2 years ago
Explain what is ecological conservation and conservation of the environment. What can you do to conserve the environment? Why do
den301095 [7]

Answer:

Conservation ecology is the branch of ecology and evolutionary biology that deals with the preservation and management of biodiversity and natural resources. Its goal is to find ways to conserve species, habitats, landscapes, and ecosystems as quickly, as efficiently, and as economically as possible.

-These are some examples of how we can conserve the environment:

Recycle your rubbish and participate in or help organize recycling campaigns.

Avoid littering and participate in or help organize litter clean-ups (here you can link to a website for volunteering or starting your own beach clean-up).

Use less plastic by, for example, carrying a reusable water bottle, saying no to disposable straws and cutlery, avoiding plastic toys, and bringing your own shopping bags (for further ideas on a plastic-free life take a look here).

Swap toys, movies, and books instead of buying new ones.

Donate, recycle, and repair electronic devices (see how here).

Use less water when brushing teeth, taking a shower, or washing the dishes.

Use less electricity by turning off lights and electronic devices when not in use, using energy-saving light bulbs, and hanging clothes to dry.

Use public transport, share a journey with friends (e.g., car-sharing), cycle, or walk when possible.

Use less paper by not printing unnecessary things and reading e-books.

Turn down the air conditioning when it is hot and use fans if you are still hot-they use much less power.

Turn down the heat when it is cold and use sweaters, blankets, and socks to keep warm.

Do not waste food and try to buy food that is grown locally and in season.

Hope this helps:)

8 0
3 years ago
Give any two examples for gas pressure​
skelet666 [1.2K]

Answer:

tire and balloons

Explanation:

the tire of an car contains gas pressure

the balloon also contains gas pressure because it contains gas molecules

7 0
3 years ago
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