There are some reasons which could be mentioned:
1)Energy is lost as heat at each feeding level
2)Consumers who feed directly on plants have more energy for themselves than consumers feeding on other consumers. Indeed, energy again is lost in each level.
3)Feeding cattle is not productive, because energy must be transferred from plants to the cattle and then to people.
Answer:
The options are
it was too old to be used in modern times
it was too complicated for scientists to understand
scientists found new evidence to prove it invalid
scientists discovered a shorter theory to replace it
The answer is scientists found new evidence to prove it invalid
Steady State Theory of origin of the universe has been rejected due to new findings about how the universe was formed through carefully observing it which faulted past theories. This validates the option which states that scientists found new evidence to prove it invalid.
The answer should be rectum.
<h2>Answer and Explanation</h2>
DNA is called deoxyribonucleic acid. DNA is different in all plants and animals but according to the chemical structure, it is the same as double helix strand that is separated from each other. In a person body, all the DNA are the same but they are different if the cells, tissues, and organs are different. There are some mammals have slightly similar DNA that is humans have 99.6% same DNA as the chimpanzees.
Answer:
The correct answer is They are very common in symbiosis in all plant families.
Explanation:
Nitrigen fixation is a process in which the atmospheric nitrogen is converted to ammonia by the help of nitrogen fixing bacteria such as azobacter, clostridium.
These bacteria lives in the root nodules of leguminous plants and some of them are free living soil bacteria such as azobacter.
These bacteria only form symbiotic relationship with the root leguminous plants but not with other plant families.
