Answer:
and a single circular DNA molecule.
The sentence a Venus flytrap closes its leaves when its trigger hairs are stimulated is the best example of a living thing responding to its environment (option B).
<h3>What does characterize living organisms?</h3>
The main characteristics of living organisms refer to features shared by different life forms, which are essential to sustaining life, i.e. their metabolic activities in order to perpetuate across time.
One of the main characteristics that sustain life is the ability to respond to environmental stimuli. In this regard, it has been debated if this feature is the main characteristic that sustains life, but detractors of this idea state that it is not the main feature because viruses are able to respond to stimuli and they are not alive.
Therefore, with this data, we can see that the ability to respond to stimuli is one of the main features of living organisms.
Learn more about the characteristics shared by live organisms here:
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Answer:
The correct answer is: Pupil.
Explanation:
- Light enters inside the side through a small opening in the iris of the eye which is called the Pupil.
- The outer most part of the eye Cornea and the outer chamber aqueous humor are both transparent and allow light to refract through them.
- The Iris, which a circular and thin comes next to the cornea and aqueous humor. It is reponsible for regulating the amount of light that can reach the retina by altering the pupil size.
- The change in the size of the pupil is mediated by muscles in the iris.
- There are two types of muscles, radial muscles and circular muscles.
- In bright light, the radial muscles of the iris relax while the circular muscles contract. This decreases the pupil size allowing less light to pass into the retina.
- In dim light, radial muscles of the iris contract while the circular muscles relax. This increases the pupil size allowing more light to pass into the retina.
