Algae produces a estimated 30-50 percent of the net global oxygen .
the branch of science which deals with celestial objects, space, and the physical universe as a whole.
Explanation:
Keystone species are animals that help manage other animal species by controlling population numbers and biodiversity within an ecosystem. The impacts of keystone species are usually greater than their numbers.
owls can be a great benefit to places where rodent populations are high. Dense urban areas often suffer from an abundance of rats and mice spreading disease, and rural agricultural communities have their crops consumed and soil eroded from burrowing voles and field mice. Without owls, and other top predators, rodent populations could explode and exacerbate the effects they produce.
Sexual reproduction consists of the fusion of the male and the female gametes to produce an offspring.
<span>Asexual reproduction is by budding off from the parent plant to produce offspring. </span>
<span>sexual reproduction: the offspring is not identical to parent. </span>
<span>asexual reproduction: the offspring is identical to parent.</span>