Answer:
The correct answer is option a. "down syndrome; heart problems".
Explanation:
Down syndrome is a disorder that is developed in people with an extra chromosome 21. People with Down syndrome are intellectually disabled and have the physical characteristics of having short fingers, slanted eyes, and a protruding tongue, as well as a decreased musculature, a short neck and a small head. Children with Down syndrome usually suffer from heart problems, the most common being the Atrioventricular Septal Defect.
Answer:
After a disturbance such as a fire or flood has occurred, an area can get reestablished by the process of secondary succession. Secondary succession can be described as an ecological succession in which life begins to form again in area which has been eradicated due to disturbances. Firstly, the pioneer species, such as small grasses or shrubs, will start to form on this land. Them with the passage of time the pioneer species will be replaced by the intermediate species such as different plants and trees. animals will start to occur more on this land. Finally, a complex community will arise to support life.
<span>Biological scientists are research scientists who examine how living organisms relate to the environment. They can specialize in any number of plant, animal or environmental studies. Biological scientists most often have earned a master's or doctoral degree in their specialization; such degrees offer the opportunity to develop research while finishing their education. Some low-level positions related to biological science are available to those holding baccalaureate degrees.</span>
