Genetic diversity is therefore required so that in changing environmental or stress conditions, some of the progeny can survive. Self-pollination leads to the production of plants with less genetic diversity, since genetic material from the same plant is used to form gametes, and eventually, the zygote. In contrast, cross-pollination—or out-crossing—leads to greater genetic diversity because the microgametophyte and megagametophyte are derived from different plants.
Because cross-pollination allows for more genetic diversity, plants have developed many ways to avoid self-pollination. In some species, the pollen and the ovary mature at different times. These flowers make self-pollination nearly impossible. By the time pollen matures and has been shed, the stigma of this flower is mature and can only be pollinated by pollen from another flower. Some flowers have developed physical features that prevent self-pollination. Insects easily cross-pollinate while seeking the nectar at the bottom of the pollen tube. This phenomenon is also known as heterostyly. Many plants, such as cucumber, have male and female flowers located on different parts of the plant, thus making self-pollination difficult. In yet other species, the male and female flowers are borne on different plants (dioecious). All of these are barriers to self-pollination; therefore, the plants depend on pollinators to transfer pollen. The majority of pollinators are biotic agents such as insects (like bees, flies, and butterflies), bats, birds, and other animals. Other plant species are pollinated by abiotic agents, such as wind and water.
These are the four individual quadriceps
Answer:
Reaction formation
Explanation:
Reaction formation is a psychological term that is handpicked from psychoanalytic theory. Reaction formation talks about defense mechanism that occur as a result of nervousness (such as emotions and impulses) manufactured or decoded to be unpleasant and are being learned by overemphasizing and over-exaggeration of the directly contravening propensity.
In Reaction formation, you're definitely fixing an entity, that entity might be likeness, desire, or idea. For example, a brilliant student who fails a course, may react to his feelings of guilt for not wanting such type of low score by becoming extremely overprotective and overemphasizing to convince himself and the lecturer in charge of the course that he is capable when re-taking the course again.
ATP synthase changes ADP into ATP when light energy passes through it. The light-dependent reactions supply the Calvin cycle with CO2 and ATP.
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>uh</em><em>.</em>
Simply put, the arrow in the food web represents the flow of energy from one thing to another.