The genotype of an octopus is DD or Dd if an octopus of this species has long arms. DD genotype gene is defined as a linkage marker for an etiologic mutation at or neat the angiotensin-converting enzyme gene and has been associated with increased risk for the development of coronary artery disease. The genotype is DD or Dd.
Answer:
True
Explanation:
Pioneer organisms are the first organisms that reoccupy a region that was destroyed by a disaster like flood, forest fire, volcanic eruptions, etc. These pioneer species can grow in the habitat that is barren and is not suitable for the growth and survival of other species.
Some of the pioneer species are lichens and algae. Pioneer species like lichens help in the formation of soil from breakdown or rocks which allow the formation of a suitable environment for the ecological succession of other species like mosses, algae, and other small plants. Therefore the statement is true.
Answer:
D. They live in freshwater, are free-living and reproduce sexually and asexually.
Explanation:
Most planarians are found in freshwater. Since they reproduce through fission, they reproduce asexually. However, since they are heteromorphic, they also reproduce sexually.