Answer:
D. X: Gene for sweeter fruit
Y: Apple tree DNA
Explanation:
The process that producing apple trees with desired trait of sweeyer fruits will require gene for sweeter fruit and apple tree DNA.
Genes are responsible for carrying traits or characterstics from parent to daughter, here the trait is sweetness and genes are must to carry this trait otherwise apple will lack sweetness.
DNA carry instructions which are required to develop, reproduce and survive by an organism. DNA undergoes several processes like replication, transcription and translation and share the DNA of male and female parent (sexual reproduction) to produce new organism or plant. hence, DNA of apple tree will be required.
Hence, the correct option is D.
Highe clouds have added moisture to. lower cloud, which cannot hold its droplets anymore
The respiratory system is the set of organs, which allows breathing, that is to say, the gaseous exchanges between the body and the environment.
The respiratory system can be easily assimilated to a bunch of grapesThe main stem of this branch of grapes is the trachea. then divides into smaller ducts called bronchi. Next, it branches into even smaller branches called bronchioles.
The grapes themselves are the alveolar sacs that are branched with the bronchioles. (each grape is an alveolar sac, the functional unit of the respiratory system).
Answer:
because 90% of energy is lost in the environment as heat.
Explanation:
According to the 10% rule, only 10% of energy is transferred from one trophic level to the next trophic level. It means that if the producers have 100% percent energy than only 10% of energy will be passed from producers to primary consumers.
So only a small amount of energy is transferred to the next trophic level because most of the energy is lost as heat during the oxidation of food. Therefore a very small amount of energy is transferred to the highest trophic level.
As less energy is available to support the organisms present on higher trophic level so their number is lower than the number of organisms present at lower trophic levels.
