An and Sturtevant
0
0.0 Aristaless (no bristles on antenna)
1.3 Star eye
How often two genes cross-over
can tell us how far apart the
genes are from each other. This is
called recombinant frequency (rf).
These calculations allow us to
create a gene map like this one.
31.0 Dachs (short legs) –
IN
LES
LATO
EY
IN
51.0 Reduced bristles
/
LES
-
Circle in red the two genes that
are closest together.
+
OU
575
Underline in green the pair of
genes that are furthest apart.
57.5 Cinnabar eye
67.0 Vestigial (small) wing -
99.2 Arc (bent wings)
107.0 Speck body
S
L 110
Genes that are closer together on
the chromosome are more likely

it is b

explanation: mark brainliest because i am trying to get to the next level and i just need 1 more

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.

synapse nervous system