Answer: Receptor
Explanation: a protein that detects a signal molecule and performs an action in response.
A receptor protein is a type of protein that detects a signal molecule (ligand) and performs an action in response. It can induce a chemical reaction within the cell or initiate a signaling pathway which can change the cell's behaviour.
A protein that detects a signal molecule and performs an action in response is called a receptor protein. Receptor proteins in or on a target cell bind to specific molecules outside the cell called ligands. When a ligand binds to its specific receptor, it induces a chemical reaction within the cell. This binding could open a channel for certain ions to flow into the cell or initiate a signaling cascade or pathway with the help of second messengers, enzymes, and other proteins. The signaling cascade eventually leads to a change in the cell's environment or behavior. For example, neurotransmitters such as dopamine can act as ligands, binding to dopamine receptor proteins on nerve cells and causing specific responses in these cells.
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As succession proceeds in an ecosystem, there is an increase in population density. This is accompanied by the change in the species diversity as well. Thus, the correct option is B.
Ecological succession is the process through which the mixture of species and habitat in an area changes over the period of time. Gradually, these communities of species replace one another until a climax community like a mature forest is reached in that ecosystem, or until a disturbance, like a fire, occurs in that region.
The succession of an ecosystem begins with a pioneer species such as the lichens, some fungi species. Species such as the lichen begins to secrete acids which begin to break the barren land into a number of small particles. The small particles mix with the lichen species remains and starts the process of soil formation. On addition of the soil, more diverse plant species such as bryophytes and pteridophytes grow on the land. Later on, these plants are replaced by the most diverse angiosperm species. In this way, the species diversity tends to increase as a result of ecological succession.
Therefore, the correct option is B.
Learn more about Ecological succession here:
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Answer: B.
Explanation: Ecological succession, quite literally, is the change in the species of an area/ecosystem that had earlier been completely wiped out. Wildfires are a prime example of that.
Answer:
A watershed is land that contributes water to a stream, river, lake, pond, wetland or other body of water
A watershed often contributes water to lakes or streams.
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Answer:
Landslides are more widespread than any other geological event. They are defined as downslope transport of soil and rock resulting from natural phenomena or man made actions. There can be different types of movements: falls, slides, topples, lateral spread, and flows. Landslides can be secondary effects of heavy storms, volcanic eruptions and earthquakes.
Convection; conduction; radiation
B.
Conduction; radiation; convection
C.
Conduction; convection; radiation
D.
Convection; radiation; conduction
Answer:
B. Conduction; radiation; convection is the correct answer.
Explanation:
Conduction:is heat transfer between materials that are touching.Heat flows when the two objects are in contact with each other at a different temperature.
In the case of conduction transfer of heat take place by direct touch and collisions within the molecules.
Radiation is a process of heat transfer that does not depend on direct contact among the energy source.radiation is heat transfer through empty space.
radiation is the release of energy in the form of particles by a medium.
convection:is heat transfer by the movement of warm particles.
Convection happens when the heat is transmitted through the liquid, vapor or gas by the warmer material flow into a cooler region.