A. There were animals 3 billion years ago; they just weren't fossilized. B. Animals are warm-blooded; the ocean was too cold for animals.
The Earth comprises many spheres of subsystems, which associate with each other to develop a composite and spontaneously changing system of the Earth. The processes taking place in the system of the Earth occurs on spatial scales changing from fractions of millimeters to thousands of kilometers, and on time scales, which varies from milliseconds to billions of years.
The examples of instantaneous scales are a rotation of the Earth, breathing, an earthquake.
The examples of long-term scales are making coal and plate tectonics.
The system of the Earth is featured by various overlapping cycles in which matter is recycled again and again. The cycles involve interactions between multiple spheres and systems. The examples of cycles are rock cycle, day and night, and seasons.
Volcanoes discharge a huge concentration of particulate matter into the atmosphere. These particles function as nuclei for the development of droplets of water (hydrosphere). The rainfall, that is, hydrosphere usually upsurges after an eruption, initiating growth of the plant (biosphere). Thus, volcanoes and volcanic activities are a good illustration of system interactions.
<span>The correct answer is Mitochondria. That's why it is said that the mitochondria is the powerhouse of the cell. Cellular respiration is a process in which the mitochondria converts nutrients from food into energy created in the form of ATP and ADP. This energy is then transfered to wherever you need it to have a proper metabolism and keep your bodily functions normal.</span>
The principal advantage of asexual reproduction is that the organism does not have to waste time or energy looking for a mate.
Answer: Oxidation of Glucose,Glycolytic reactions
Explanation:
