23
A fruit fly with a black body and red eyes mates with a fruit fly with a brown body and
brown eyes. The offspring all have brown bodies and red eyes. When the offspring mate
with each other, they produce some flies with black bodies and brown eyes and some
with brown bodies and red eyes. They also produce offspring that resemble the original
pair of flies. Why does the third generation of flies have combinations of traits that
were not seen in the first generation?
A The alleles for the traits are recessive.
B
The alleles for the traits are dominant.
C
The alleles for the traits assort independently.
D
The alleles for the traits develop mutations.

c

explanation:

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.