Pharyngeal constrictor muscles (superior, middle and inferior)
The pharyngeal constrictor muscles are a group of muscles that form the lumen of the pharynx. After you swallow, an act that you have control, it starts a involuntary contraction by these muscles to propel the bolus downwards.
Rinderpest disease is caused by a virus that affects hoofed animals, including cattle and wildebeest. In the 1950s, a cattle vaccination program was implemented to eradicate the disease in the Serengeti, and this led to dramatic changes in the populations of wildebeest and other species. The figure shows the number of wildebeest in the Serengeti ecosystem (shaded circles, left y-axis) and the prevalence (i.e., percentage) of individuals infected by rinderpest disease (unshaded squares and triangles, right y-axis) from 1958 to 2003.
Answer:
c. mosses
Explanation:
Primary succession occurs in places that have never been occupied by a community. Simple species are established first, as they help enrich the soil, allowing other species to become established. The first organisms to appear in areas of primary succession are often pioneer species such as mosses or lichens.
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Answer:
Kenji must conduct a scientific investigation for a science project. Which step should Kenji complete first?
Develop a testable question based on research or prior knowledge.
Explanation:
scientific method
Answer:
Mitochondria are double membrane bound cytoplasmic organelles present in most eukaryotic cells. They are responsible for aerobic respiration.
Explanation:
