When you are exposed to sunlight for a long time, your skin, which otherwise appears normal, gets heavily tanned. What could be the reason? A. The genes for melanin pigmentation remain turned on and prepare more melanin than usual to protect the skin from photo-damage when it is exposed to sunlight for long time.
B. The genes for melanin pigmentation remain turned off and synthesize more melanin than usual to protect the skin from photo-damage when it exposed to sunlight for a long time.
C. The genes for melanin pigmentation are switched off to stop the synthesis of melanin.

Answers

Answer 1
Answer: A. The genes for melanin pigmentation remain turned on and prepare more melanin than usual to protect the skin from photo-damage when it is exposed to sunlight for long time. 

Melanin is a pigment that gives the human skin, hair, and eyes their hue. Moreover, with this pigment it helps the individual against sun's rays or UVR that damages the skin tissue if in contact for a long period of time.  

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Select all that apply. Raw materials needed for photosynthesis are _____.

The graph shows the population of alligators and insects in a pond ecosystem where cricket frogs live. How will this impact the population of cricket frogs over time?A graph with the title Species Population is shown. The y axis title is Population and next to it is an arrow pointing upwards. The x axis title is Year and the values 1, 2, 3 4. 5 are marked on the x axis. A solid slanting graph line is shown sloping gently upwards. A straight broken graph line is shown. A key is shown at the bottom right of the graph. Next to the straight line is written Alligators and next to the broken line is written Insects.

Answers

Answer:

Explanation:

Decreases because the number of predators increases

Answer:  Decreases because the number of predators increases

Explanation: i took the test

What happens when something goes wrong with transcription and translation

Answers

A mutation can occur sometimes. 

Neurons communicate with each other through __________.a. synaptic transmission
b. neural receptors
c. postsynaptic signals
d. neural impulses

Answers

The answer is a. synaptic transmission.
Synaptic transmission is a process of communication between two neurons. The communication occurs through a synapse, a structure that enables a neuron to send a signal to another one. The communication between two neurons happens as follows: the presynaptic neuron releases signaling molecules - neurotransmitters - which pass through synapses and bind to the receptors on another neuron. 

Final answer:

Neurons communicate with each other through synaptic transmission. This involves the presynaptic neuron releasing neurotransmitters into the synapse, which are then received by the postsynaptic neuron to continue the signal. Option A.

Explanation:

Neurons communicate with each other primarily through synaptic transmission. This process is basically the transmission of signals across the synapse (the tiny gap between neurons) through the release of chemicals known as neurotransmitters. One neuron (the presynaptic neuron) releases these neurotransmitters into the synapse, where they can be received by a second neuron (the postsynaptic neuron) via specialized structures known as neural receptors.

These receptors are designed to bind to specific neurotransmitters, resulting in what are known as postsynaptic signals, which then trigger a series of changes that propagate the signal along the neuron. These changes generate a neural impulse (also called an action potential), which is essentially an electrical signal that travels down the neuron's axon and can then trigger the release of more neurotransmitters at the next synapse, continuing the process of communication.

Learn more about Neuronal Communication here:

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Which of the following soil types is richest in organic material? A. Yellow soil
B. Blue soil
C. Dark-colored soil
D. Red soi

Answers

c.Dark-colored soil.It indicates a high percentage of organic matter in the soil.The darker the soil,the higher its percentage of organic matter.Dark soil are very fertile and and suitable for any crop cultivation.

In the cell cycle, cytokinesis occurs at the end of

Answers

Answer:

The answer is Telophase

Explanation:

Cytokinesis involves the physical separation of the cytoplasm into two daughter cells during cell division. In both mitosis and meiosis occur at the end of telophase, which is the reversal of the processes that took place during the prophase and promethaphase. That is, everything returns to the beginning and the process is repeated.

Cytokinesis occurs after Mitosis. Mitosis is the cell division into two identical nuclei, having the same number and type of chromosomes. Cytokinesis is the division of the cytoplasm that creates two daughter cells that are equal genetically and in size.

Which of the following properties of transposable elements allows them to contribute to the C-value paradox?A. Their copy number can increase from one generation to the next.B. Their replication is controlled by genes found on the transposable element itself.C. Copies of transposable elements can appear on multiple chromosomes.D. All of these choices are correct.

Answers

Answer:

All of these choices are correct.

Explanation:

Transposons are the DNA sequences that can move from one location to another in the genome. The transposon genes are also known as jumping genes.

The C value paradox of the transposable elements depends on the different factors. The transposons can increase their number by copy and paste mechanism. The genes can be controlled by the enzyme transposase and their copies may exist at the different site of the chromosome.

Thus, the correct answer is option (D).