Answer:
<h2>Mainly by Hydrogen bonds and the Van der Waals forces
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Explanation:
The DNA double helix (both strands of DNA) are held closs together by i) mainly hydrogen bonds between complementary bases and ii) the Van der Waals base-stacking interaction.
The hydrogen bonds between the base pairs form the double helical structure of DNA. There is no exchange or sharing of electrons in hydrogen bonds.
G always pairs with C with three hydrogen bonds and T always pairs with A with two hydrogen bonds.
Answer:
There are 11 major types of lakes on the basis of their origin.
Explanation:
1) Meteorite lakes- This kind of lake formed in the depressions made on the land as a result of meteor, crashing on the surface of the earth. Example- The Lonar Crater Lake.
2) Anthropogenic lakes- This type of lakes are the result of human activities. Sometimes the abandoned excavated sites can be turned into lakes.
3)Shoreline lakes- This type formed by the deposition of sediments by rivers or ocean currents.
4) Aeolian lakes- Lakes produced by the action of winds are known as Aeolian lakes. Example- Moses lake, Washington.
5) Solution Lakes- Generally Formed by the soluble bedrock and the dissolution of bedrock by percipitation. This kind of lakes can be found in Florida.
6) Landslide Lakes- Earthquake and volcanic eruption can lead to the formation of this kind of lakes. These lakes are sometimes known as debris lakes. The Usoi Dam located in Tajikistan is an example.
7) Fluvial Lakes- Generally produced by the running of water.
8) Tectonic Lakes- This type of lake formed by the movement of the tectonic plates.
9) Glacial Lakes- They are generally formed by the melted glacier.
10) Volcanic Lakes- These are basically formed with a volcanic origin.
11) Organic Lakes- Formed by the action of flora and fauna. These lakes are normally smaller in size.
Answer: The correct answer is b) Negative Reinforcement.
Explanation:
Negative Reinforcement is done in operant conditioning when a stimulus that is unpleasant to the subject is removed in response to a stimulus.
<u>Over time, the behavior expected to be reinforced should become more common over the expectation of having the unpleasant or aversive stimulus taken away.</u>
Example:
<u>On wednesday morning, you leave your house at 7am (the behavior) to avoid being late for work and getting a memo (removal of an aversive stimulus)</u>
The correct answer is b. Operant conditioning through the removal of a (generally) unpleasant or aversive stimulus is known as: Negative reinforcement.
Answer:
The answer is homeostasis.
Explanation: