Rice, wheat, soybeans, and _______ are considered the four angiosperms that are responsible for early agriculture. _______ is a
plant hormone associated with fruit ripening, rotting, and flowering but not with seed dormancy, germination, or growth. Many plants, such as trees, have complex chemical changes inside them that prepare them to go _______ during the winter. The _______ is the male structure in a plant that produces pollen. The _______ is sticky and receives pollen from pollinators, to transfer to the ovaries. To protect their seeds and allow for dispersal, plants can develop _______ to protect the seeds. Moisture and _______ determine many seeds' germination rates. What advantages do animal pollination bring to angiosperms that might explain the dominance of these relative newcomers among the plants?
8. Wind pollination required a great deal of excess pollen, just so some of it lands, by chance, in the right place. Animal pollination is more selective because animals pick pollen up and carry it directly to where it needs to be. Although there is still a chance that the pollen will be from the wrong plant species, plants can manipulate variations in animal behavior through the structures of their flowers, the time and season of flowering, or the rewards or attractive chemicals they produce to narrow the field of pollinators, and increase the chances of having exactly the right pollen put in exactly the right place.
8. Wind pollination required a great deal of excess pollen, just so some of it lands, by chance, in the right place. Animal pollination is more selective because animals pick pollen up and carry it directly to where it needs to be. Although there is still a chance that the pollen will be from the wrong plant species, plants can manipulate variations in animal behavior through the structures of their flowers, the time and season of flowering, or the rewards or attractive chemicals they produce to narrow the field of pollinators, and increase the chances of having exactly the right pollen put in exactly the right place.
As GPP stands for the gross primary productivity, it's the total amount of energy produced in the process and the NPP is the net primary productivity. NPP is the difference between the GPP and the energy used by the producer for the process of respiration.
GPP is a continuous and ongoing process that consumes the energy as compared to the NPP that store energy and not being used. Thus, GPP can affect NPP but NPP does not affect GPP.
For example, GPP is completely being dependent on the chlorophyll content of the plant, but NPP is independent of that content of chlorophyll.
