Question #1

1 answer:

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Issues and Needs in Science identified by the USGS as being connected to agricultural practices' environmental impacts are as follows:

Effects of habitat fragmentation and changing land use on animals.
Juggling competing water demands from the urban and agricultural sectors.
Interactions between surface water, subsurface water, and air that have an impact on water quality.
Water quality effects of irrigation, drainage, and return flow in agriculture.
The creation and application of cutting-edge farming methods to preserve soil and water and enhance water quality.
Genetically modified creatures' effects on naturally occurring species and environments.
Rapid assessment methods and tools for locating agricultural contamination sources.
Impacts of pesticides, fertilizers, and sediments on the habitat quality and health of fish and wildlife.
Effects of soils, riparian forests, and wetlands—characteristics of watersheds—on nutrient uptake, retention, and cycling.
Endocrine disruptive substances, veterinary medications, feed additives, hormones, and infections are transported across terrestrial and aquatic ecosystems and ultimately end up there.

Learn more about environmental pollution here:

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This is a monohybrid cross between involving a gene coding for earlobe. The allele for free earlobe (F) is dominant over that of attached earlobe (f).

N.B: let F represent the gene involved.

A genotypic ratio is the ratio derived from the offsprings based on the actual genetic make-up and not based on their phenotypic appearance as in phenotypic ratio.

A homozygous individual is an individual having the same kind of alleles for a gene while a heterozygous individual is one that has two different alleles i.e. combination of the dominant and recessive allele.

The monohybrid cross is between an individual with attached earlobe (ff) i.e. homozygous recessive individual. (Note that, a recessive trait will only be expressed in a homozygous state) and a heterozygous free earlobeb individual (Ff). (See attached picture). Ff × ff

The resulting four offsprings will

be expected to have only two distinct genotypes i.e heterozygous (Ff) and homozygous recessive (ff) in an equal ratio i.e. 2:2 ~ 1:1