Answer:
fixed action pattern, key stimulus; key stimulus, fixed action pattern
Explanation:
- An innate behavior which specific to a species and is highly stereotyped is termed as a fixed action pattern.
- This behavior occurs due to a neuronal network that is hard-wired in the species and the response is said to be generated following a key stimulus.
- A key stimulus is the one that generates a fixed action pattern and this is also called a releaser.
- A key stimulus can be in the form of shape, sound, color, or a combination of these.
- In this case, the red spot is a stimulus for the chicks which causes them to peck at their parent's bill, and hence, the red spot is a key stimulus, and pecking of the chicks is a fixed action pattern.
- The parents regurgitate the food only when the chicks peck at their bills, so pecking is a key stimulus for the parents which causes them to regurgitate the food which is a fixed action pattern.
D)Heat within Earth
Explanation:
The heat from within the earth is as a result of plate tectonics. Plates on the earth are driven by heat within the earth through convection currents.
- Plate tectonics suggests that the earth are broken into slabs that moves on the weak and ductile material called asthenosphere.
- Heat from within the earth causes the melting of asthenosphere.
- The riding lithosphere which is cold will sink into the asthenoshpere.
- Hot mantle materials will move to the surface thereby setting up a convection current.
- Heat from within the earth rises to the surface due to plate movement.
Learn more:
Lithosphere brainly.com/question/9582362
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Answer:
The correct answer will be option-A.
Explanation:
Inverted repeats are the sequence of the nucleotide in a nucleic acid which is identical but arranged in the opposite orientation. The inverted repeat may be separated by some sequence or they may lie adjacent to each other. They can be read the same from the backwards or forward direction.
In the given question since four bases when read from the forward direction is same as reading the sequence from the backward direction like CGAC can be read the same both backward and forward.
Thus, option-A is the correct answer.
The answer is d because of heat and pressure
Answer:
Outer Core of Earth
Explanation:
The outer layer of core of earth consists of iron as a major constituent. Due to internal high temperature and low pressure (as compared to the inner core) , the iron in this layer exists as liquid iron. Since the earth is rotating continuously on its axis, the liquid iron is also rotating thereby producing magnetic field. Due to magnetic field , this sphere of earth is known as magnetosphere.
