Afemale car has two recessive genes for long fur (s) and a male cat has two dominant genes for short fur (ss). what is the likehood the two cats produce a kitten with short fur?

100% or 1 probability

Explanation:

This is a typical monohybrid cross involving a single gene; a gene coding for fur length in cats. The allele coding for short fur (S) is dominant over the allele coding for long fur (s).

In a cross involving a female cat which is homozygous recessive (ss) i.e. (having same recessive allele and phenotypically long furred) and a male cat which is homozygous dominant (SS) i.e. (having same dominant allele and phenotypically short furred), all offsprings (kittens) in the F1 generation will be phenotypically short-furred but genotypically heterozygous (Ss). (See attached image).

Since all offsprings will be phenotypically short-furred, therefore, the likelihood or probability of producing a short furred kitten is 100% or 1.

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.