The environment is studied at different levels & stages.
Biosphere: The biosphere is the zone in which life exists. It consists of the atmosphere& the hydrosphere alongwith the earth surface where living beings live.
The biome is a community of plants and animals (flaura & fauna).
Community: A community is a group of people/living beings who live in a specific location. It is used to describe two or more populations of different species that exist at same place.
Population: A population is the multiple individuals or living organisms of a single species that live in an area.
The populations are formed by lalrge number of groups of organisms.
Group of populations form communities. The group of all communities form a biome, which exist in the biosphere.
The diagram shows:
9:3:3:1
that is the phenotype ratio
9/16 is gonna have freckles and cleft chin (dominant traits)
3/16 is gonna have freckles and no cleft chin
3/16 is gonna have cleft chin but no freckles
1/16 is gonna have no freckles and no cleft chin (recessive traits)
take R as freckles and dominant, r as recessive and no freckles
take Y as cleft chin dominant, y as no cleft chin recessive and substitute
Answer:
D. Populations are greater in fertile areas that are close to freshwater sources, which is why more people live near rivers.
Explanation:
Population is greatly depend on the availability of water. Those areas are densely populated areas where water is present in sufficient quantity as compared to those areas have low population density where water is in low amount. The main reason is that water plays a vital role in our daily life which is used almost in every aspects of life. We can see that deserts have less population due to less water availability and areas attached to the rivers are densely populated due to more water availability.
I can’t read most of them, I don’t know if it’s just my device but it’s a bit blurry