Cyanobacteria were the first organisms to introduce oxygen into Earth's atmosphere. They were also known as blue-green algae, and is estimated that they first appeared around 3 billion years ago.
Explanation:
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
Answer: Humans have 22 pairs of autosomal chromosomes with the same gene in both members of a given pair) and one pair of sex chromosomes, which are designated XX in females and XY in males.
Explanation:
In doing these exercises, this is likely to increase the response of the parasympathetic nervous system in which results of making the heart slow and as well as the respiration rate with less muscular tension. The parasympathetic nervous system is the one responsible for conserving energy that makes the heart rate slower, increase the activity of the gland and intestinal activity and as well as relaxing the muscles.
Answer:
The ability to both attach to solid materials and endure long periods of time without water