Answer:
Amino acids contain nitrogen.
The correct option is this: TWO DRAGONFLY SPECIES REGULARLY MATE BUT THEIR GAMETES ARE INCOMPATIBLE.
In biology, there are different types of reproductive barriers, one of these is prezygotic barrier. A prezygotic barrier is a kind of mechanism that prevent reproduction from occurring by blocking fertilization. In this case, the concerned species will be mating together, but their gametes will not be compatible and thus, zygote will not be formed.
A postzygotic barrier on the other hand is said to occur when the reproduction process is blocked after the formation of zygote or after fertilization has taken place. A good example of this is an hybrid mule that is sterile and can not reproduce.
Answer:
20
Explanation:
The ecosystem is made of tropic levels that starts from producers and ends on consumers. The producers get the maximum energy from the sun and then transfer only 10% of the total energy to the next tropic levels.
If snake receives 200 calories of the energy from eating a rabbit, then 10% of 200 = 20, would be passed down to the hawk.
