Over Earth's history a number of supercontinents are thought to have existed. The most recent and well understood is the supercontinent known as Pangaea, which formed approximately 335 million years ago and began to break up into the continents we know today, from about 175 million years ago.
It's important to understand that the Earth's crust and it's land masses are in constant flux over geological time. Tectonic plates are shifting continuously and over millions of years this causes land masses to collide and split apart. The way we see the land mass (countries and continents) distributed on a world map today is simply a snap shot in Earth's history. It was a vastly different picture 100 million years ago and will be a vastly different picture in 100 million years. The Himilayan mountain range in Asia is growing today at a rate of about 1cm per year as the Indian and Eurasian tectonic plates continue to collide and thrust up crust material to produce the mountains.
The evidence to support the supercontinent theory is not just in tectonic plate theory, it's in the relationships between life on and between different continents. When land masses split and separated populations of plants and animals, they evolved differently to form new species. The intricacies of these inter-species relationships and genetic heritage can be used to track the nature of how the landmasses interacted over time.
It occurs because of contraction of the muscle layers. There are two types of muscle found in the alimentary canal; longitudinal and circular muscle, the alternating contraction of these muscles forces the bolus of food through the digestive system.
I think the neurotransmitter associated with bulimia nervosa is the hormone serotonin or 5-HT (5-hydroxytryptamine). Serotonin is an important chemical and neurotransmitter in the human body that is responsible to regulate mood and social behavior, appetite and digestion, sleep, memory, and sexual desire and function. Bulimia nervosa is an eating disorder characterized by eating large amount of food in a short amount of time.
Answer: The correct answer is- all the sugar maple trees that are present in a state park.
Population can be described as a group of individuals belonging to a particular species, which inhabit a particular area.
In this question, last option that is all the sugar maple trees that are present in a state park correspond to a particular population.
Other options have organisms occupying different areas across the world.
I’m pretty sure it’s B, endoplasmic reticulum