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Ber [7]
3 years ago
11

1. What function do photoreceptor cells perform?

Biology
1 answer:
Eddi Din [679]3 years ago
5 0

Answer:

The correct answer is 3 They detect light,allowing the spiders to see colors.

Explanation:

Photoreceptors are also called transducin  presnt in the rod cells of retina and play an important role in vision.

     The phoreceptor is a G protein coupled receptor that contain GDP.When light strikes the eye the GDP is coverted to GTP resulting in the activation of the photo receptors.

 The activation of photo receptors result in the closure of Na+ ion channels leading to hyperpolarization caused by lowering the cellular label of cGMP by the activation of phosphodiesterase enzyme.

  This ultimately result in the formation of 5"GMP.

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state one reason why air we breath is chocking us to death has negative impact no individual's right in a Democratic society​
Ulleksa [173]
We are wearing masks so we are breathing in CO2 which is not good for us. We are meant to breathe in oxygen and breathe out co2
5 0
3 years ago
Cells occasionally need to take in or drink large amounts of water, this process is called pinocytosis. How does this process di
qwelly [4]

Answer:

C. It is active transport, and moves against the concentration gradient.

Explanation: Pinocytosis is an active transport in which the molecules move from a low to a more higher concentration gradient. During this process it requires energy to move molecules and the energy used is ATP.

4 0
3 years ago
Match each part of Sammi's model to the bodily structure it represents. One bodily structure has already been labeled for you.
KiRa [710]

Answer:

corrugated cardboard tube - digestive tract

irregular surfaces on the corrugated tube - villi

pump - heart

Plastic tubing - blood vessels

Explanation:

The corrugated cardboard tube represents the digestive tract.  The give away was the presence of the irregular surfaces within the tubes. This is called the villi. The villi is responsible for the absorption of food after digestion into the body.

Irregular surfaces on the corrugated tube represent the villi. They are tiny hair-like structures that are in the small intestine, that are responsible for the absorption of food into the bloodstream.

The pump represents the heart. The heart is the only organ in the body that provides the pressure force that pushes the blood throughout the body. In this model, the pump will most likely be performing the same function.

The plastic tubings are meant to contain one form of fluid or the other. Judging from that, they can be said to represent the blood vessels. This is because they are connected to the heart and are meant to transport bodily fluids around the body

4 0
3 years ago
What is happening in this photo
Ostrovityanka [42]

Answer:

Bacteriophages are attaching to bacterial cell wall and injecting genetic material.

Explanation:

Bacteriophage:

A bacteriophage (bacteria eater) is a type of virus that infects bacteria. Bacteriophages are composed of genetic material (DNA or RNA) enclosed in a protein shell or capsid.

Following are steps of bacteriophage infection:

  1. Bacteriophage attaches to cell surface receptors on the surface of the bacterium.
  2. Depending upon the type of phage, the bacteriophage either injects its DNA or RNA into the bacterium or enters as a whole. In this image, the bacteriophage T4 is represented which injects its genetic material into the host cell.
  3. The phage's genetic material hijacks the cellular machinery of the host and replicates itself within the host.
  4. After replication, the phages burst open the bacteria cell and are released. This is called the lytic cycle of bacteriophage infection.
  5. In another type of infection cycle, called the lysogenic cycle, the bacteriophage genome gets incorporated into the host genome, known as a prophage. This prophage lies dormant.

* The second step of the infection cycle is pictured here.

4 0
3 years ago
How quickly velocity changes. Velocity changes when speed or direction changes. An object speeds up, slows down or changes direc
Nana76 [90]
It is Acceleration.
Explanation: You can probably find it in the back of your book in the definition.
5 0
2 years ago
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