Answer:
The endosymbiotic theory states that chloroplast originated from A Cyanobacteria entering and remaining in the cytoplasm of another cell.
Explanation:
Endosymbiotic theory in an important theory of evolution which states that Eukaryotic cells are originated from prokaryotic organism.
The theory deals with the fact that chloroplast and mitocondria were free living prokaryotic organism at Past. The similarities between prokaryotic cell and these Eukaryotic organelles(Mitocondria,Chloroplast) and the evolution of mitocondria and chloroplast from the prokaryotic cells is best exlained by the theory of endosymbiosis.
Mitocondria evolved from the Endocytosis of aerobic bacteria,whereas Choroplast are originated from photosynthetic bacteria such as cyanobacteria.
That would be a hypothesis
Hope this helps you :)))
The atmosphere protects us from ultraviolet radiation and meteors.
A) The earth spins
The Earth is constantly spinning, or "rotating", which causes day and night
The options are incomplete and have been listed incorrectly. Complete question has been attached.
Answer:
C) Dd and Dd
Explanation:
It is given that deafness is a recessive trait which means that Dr. Smith has genotype dd since a recessive trait can only be expressed when both the alleles in genotype are recessive. However, his parents are normal. So his parents can have DD or Dd genotype. Dr. Smith has obtained one recessive d allele from his father and other recessive d allele from his mother. Thus, the parents should have Dd genotype and the correct option is c.