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Alik [6]
2 years ago
9

Which of the following is an example of a biological system?

Biology
1 answer:
AVprozaik [17]2 years ago
6 0

Examples:

Respiratory System, (I think) Organ System, Circulatory System, Nervous System, etc.

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A forest has two groups of plants that appear to be very similar both phenotypically and genotypically. The major difference is
Gennadij [26K]
The basics would be that you'd need to find out if they could exchange genetic information. If not, they couldn't be considered part of one species. Set-up 2 artificial environments so both groups would produce pollen at the same time. Fertilise both plants with the other's pollen. Then fertilise the plants with pollen from their own group. 
Count the number of offspring each plant produces. 
If the plants which were fertilised by the opposite group produce offspring, they are of the same species. You can then take this further if they are of the same species by analysing if there is any difference between the number (and health) of offspring produced by the crossed progeny and by the pure progeny. You'd have to take into account that some of them would want to grow at different times, so a study of the progeny from their first sprout until death (whilst emulating the seasons in your ideal controlled environment). Their success could then be compared to that of the pure-bred individuals. 
Make sure to repeat this a few times, or have a number of plants to make sure your results are accurate. 
Or if you couldn't do the controlled environment thing, just keep some pollen one year and use it to fertilise the other group. 
I'd also put a hypothesis in there somewhere too. 
The independent variable would be the number of plants pollinated. The dependant variable would be the number of progeny (offspring) produced. 
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3 years ago
The term "aerobic" means "with ____."
Sauron [17]

Answer:

Aerobic means with oxygen.

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Before there was life on earth, which gas was absent from the ancient atmosphere?
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D oxygen there was no free oxygen on the earth
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There are different types of nerves or mechanoreceptors located in your skin. Nerves that detect deep pressure are called _____.
UNO [17]

Nerves that detect deep pressure are called Pacinian corpuscles.

Pacinian corpuscles are microscopic onion-shaped nerve structures that are situated in the dermis and hypodermis. Pacinian corpuscles detect deep pressure and vibration. This nerve has a myelinated nerve ending in the middle of its structure and the external layer contains flattened cells, a lymph-like fluid and collagen fibers. The structure of pacinian corpuscles provides a fast response and rapid recovery by transmitting fast events. This make them sensitive to pressure and vibration.


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The days are getting shorter and the temperature is dropping. The squirrel responds to these cues by
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Gathering and preparing for a scarcely adapt winter
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