ANSWER: C, the continents were at one time joined together.
REASONING: Alfred Wegener was the first person to propose the scientific theory of Continental Drift. Continental Drift is a theory that supposes all the continents were at one time joined together as one large land mass. The mechanisms of continental drift can be explained by Plate Tectonics.
Answer:
Suspension feeding involves collecting food particles like small organisms, organic matter, detritus which are suspended in water, often using some form of filtration.
Suspension feeders catch food or organic material from the water using tentacles or spiny arms
where as
Deposit feeding involves feasting on detritus and organic matter that have settled on the ocean floor.
Deposit feeders pass sand, mud, water or sediment into their mouths using mucous-covered tentacles or arms etc.
Explanation:
Answer:
The hypothalamus is the key brain site for central control of the autonomic nervous system, and the paraventricular nucleus is the key hypothalamic site for this control.
Explanation:
1.Blood is the liquid tissue that carries oxygen and nutrients round the living systems, passing through veins and arteries. It also carry carbon dioxide out of the living system towards the lungs for exhaling out. A normal blood sample should have the following components: PLASMA, RED BLOOD CELLS, WHITE BLOOD CELLS AND PLATELETS.
2. The plasma is the liquid components of the blood and is composed of water, ions, proteins, nutrients, dissolved gases, fat, hormones, wastes, etc. The plasma function as a transport medium to deliver nutrients, hormones, ions, oxygen, etc to all the cells in the body in order to maintain homeostatic balance. The red blood cell is responsible for transporting oxygen and carbon dioxide. The white blood cell are part of the immune system and fight against infections. The platelets are the part of the blood that are responsible for blood clotting when one sustain injury.
