Answer:
b. determine the evolutionary relationships among species
Explanation:
Biologists through the analysis of characters obtained from molecular, morphological, embryological, physiological and behavioral analyzes look for the relationship between species and their origin.Through these coincidences phylogenetic trees are made.
Answer:
Bacteria
Explanation:
The organism is bacteria because it performs photosynthesis and can propel itself with flagella. It is not an animal because it can photosynthesize and it is not a plant because it has flagella like bacteria does.
Plants are producers and make their own food through a process of photosynthesis.
Organisms are classified into domains according to shared characteristics.
Plants and animals provide food for humans. Plants cycle the air for humans too.
Answer:
A) & B)
Explanation:
A) There are certain viruses that are present in both healthy and disease people.
Example: Polio virus is found in many human but it causes disesease in only 1% of human.
B) Viruses require host machinery for replication so they may not replicate in pure culture.
The postulate C is also violated, the virus may not produce disease in non-human experimental host because of inappropriate animal or vaccinated animal etc. Others exception includes, the same disease may be caused by various organisms and different organisms can also cause the same disease.