Answer:
e. All of the choices are correct.
Explanation:
Bacteria are present almost everywhere on Earth. Many bacteria like cyanobacteria play an important role in fixing the atmospheric carbon in the form of an organic molecule. These organic molecules then used to gain energy.
Many nitrogen-fixing bacteria like Rhizobium, Azotobacter, etc plays an important role in providing nitrogen to plants which is important for their growth. Many bacteria decompose organic matter into simpler form and recycle the nutrients present in them.
So bacteria like Pseudomonas putida decompose waste and clean the environment, therefore, they also help in bioremediation. So the correct answer is e. All of the choices are correct.
Answer: e. All of the choices are correct.
Explanation: Bacteria is an important part of the ecosystem. There are some bacterial species which we called (biological nitrogen fixation (BNF). These bacteria fixes atmospheric nitrogen for higher plants. There are some other bacterial species which feed on dead bodies of living material and helps in cleaning the environment. Due to this decomposition process high amount of carbon is liberated in the atmosphere and used by the plants during photosynthesis.
If a star is 300 light-years from Earth, it will take 300 light years from that star to reach Earth. So, the correct option is A.
A light year is defined as the larger unit of length used to express astronomical distances which is approximately equal to 9.46 trillion kilometers or 5.88 trillion miles.
A light year is explained as a measure of distance and not as time where light travels at a speed of 300,000 km/s where the distance that light will travel in one year is considered as a light year which is 9.4611012 is equal to km. When a star is 300 light-years from Earth, it will take 300 light years from that star to reach Earth.
Therefore, the correct option is A.
Learn more about Light years, here:
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Your question is incomplete, most probably the complete question is:
If a star is 300 light years away from Earth, how long does it take light from that star to reach Earth?
A. 300 light-years
B. 300 years
C. 300 hours
D. 300 days
B. Schwann
C. Hooke
D. Leeuwenhoek
Answer:
C
Explanation:
The major differences between the ecological niches of humans and cockroaches depend on the functional role they play, the space they live, and the group (trophic level) they belong.
An ecological niche can be regarded as an area or set of environmental factors or the surroundings of an individual where they perform their functional role.
Humans being omnivores have a generalized niche where they particularly have many options to play a functional role (feeding habit).
Cockroaches play the role of decomposers which is also an important part of any ecosystem. Living organisms are interdependent, so they need each other in order to survive. Therefore, it is wrong to say that humans and cockroaches are in competition. Cockroaches unlike humans live in really dirty and dark places because in such conditions they easily find food. While humans take a rest in dark (night) and search for their food in the daytime.
Humans take fresh and cooked food, while cockroaches shred dead and decaying organic matter into smaller pieces so that it would be eaten by recycling bacteria.
Therefore, these two different species are not in direct competition and survive without affecting each other's ecological niche.
To learn more about the Ecological niche, refer to the link:
Answer:
Ammonia and Carbon Dioxide
Explanation:
It is Ammonia and Carbon dioxide, stage 2 of the atmosphere. Little or no traces of oxygen or Nitrogen.
Hope this helps plz hit teh crown :D
Answer:
definitely low infant mortality rate
Explanation:
Answer:
positive feedback (exacerbating feedback, self-reinforcing feedback) is a process that occurs in a feedback loop which exacerbates the effects of a small disturbance.