Answer:
Protostars are difficult to observe because they are surrounded by cocoons of gas and dust.
Answer:
Domestication
Explanation:
During the Paleolithic age, dogs domesticated for the first time. Dogs serve as pets and companions. All dogs descended from wolves that diverged some 15,000 to 40,000 years ago that are less aggressive toward humans.
The large variety of dogs that exist today have different breeds developed by breeders who wanted to establish specific features in dogs.
Answer:
B. obese
Explanation:
Since highly developed nations are able to afford more food than low developed nations, there will be many people who become obese due to overconsumption of food and this can lead to many health problems like high blood pressure, diabetes, and stroke which can cause deaths and lower the population in highly developed nations.
Answer:
Oceanography is the science that studies the physical and biological parts of the oceans. Oceanography combines biology, chemistry, geology, etc.
Explanation:
Answer:
Earth's atmosphere is below 26 km is composed of 98%.
Explanation:
- Troposepher marks the boundary for most of the convective activity to take place on the surface of the earth's this place consist of 99% of the total space for the all-weather phenomenon to occur and as a result of which is considered to a homogeneous sphere.
- Here the water vapor, dust particles, and other gaseous bodies are found and thus this layer is a life-supporting layer full of oxygen and hence, comprise all biotic components like the plants, animal and man.
- Above this layer there are drastic changes in temperature with increasing height as the atmospheric pressure at higher altitudes decreases and so does the life-supporting layer, it can be noted that the layer that protects the earth i.e ozone is found in the mesosphere at an altitude of 30 kilometers.
- Rest most of the weather phenomenon takes place here as it sets the stage for weather patterns as convective currents coming from the equator can't pass this layer.
