Answer:
The structure of their noses.
Explanation:
Catarrhines are distinguished from platyrrhines by several traits but the main distinctive feature between them, is the structure of their noses. This forms the basis of their names.
Platyrrhines are characterized by laterally-placed, rounded nostrils or flat-nosed while catarrhines have narrow, downward-facing nostrils or hooked-nosed.
Another distinguishing feature include their dental formulation which is 2.1.2.3 in catarrhines and 2.1.3.3 in platyrrhines.
The skull structure of catarrhines have frontal bone which make contact with the sphenoid bone unlike the platyrrhines.
Generally, catarrhines are much bigger in size than platyrrhines.
Answer:
An index fossil is also known as guide fossils or indicator fossil. They are fossils used to determine and identify geologic periods.
The main characteristics of an index fossil include :
1.It must be distinctive.
2.It must be widespread.
3. It must be abundant
4. It must be limited in geologic time.
Due to trends and studies of most fossil-bearing rocks being formed in the ocean, the major index fossils are mostly marine animal or plant organisms.
Answer:
The orange box
Explanation:
It is the most reasonable for the plant base orginism
Answer:
Chloroplast
Explanation:
The process of photosynthesis occurs in a type of compartmentalized organelle called chloroplast which is present in plant cells. Inside the chloroplast photosynthetic membrane is present which are called thylakoids.
These thylakoids have many pigments like chlorophyll, carotenoids, etc which are responsible for capturing sunlight and carry out light-dependent reaction to produce food in the form of glucose.
This membrane also contains many proteins that helps to carry out electron transport and the formation of ATP. Therefore the correct answer is chloroplast.