Sarah wants to know which brand of nail polish lasts the longest without chipping.She buys 4 types of nail polish - Essie (which

Hydroponic farming refers to cultivating plants without soil. Terrestrial plants can grow with their roots solely in a mineral solution, or the roots may be supported by an inert medium such as perlite or gravel. The farmer’s plants might have been failing at the same rate since some plants require soil, or perhaps the roots were simply too long.

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Answer:

D

Justification:

Answer:

(A) 0.0625

(B) 25%

Explanation:

A

With the following:

T indicates tall

t indicates short

R indicates red

r indicates tan.

When a short tan male goat mates with a tall red female goat of an unknown genotype;

Let's analyze separately;

A short tan male goat = ttrr

The female goat’s genotype is not specified but it is known to be tall and red

∴ We determine that she must be T_ R_;

the potential genotype probability of the female for each allele could be:

- T

or Tt- RR

r

Nonetheless, from earlier discussion;

the chance that the female is Tt =

the probability of the female being Rr =

the probability of passing on the recessive allele 't' to offspring =

the probability of passing on the recessive allele 'r' to offspring =

∴ the likelihood that the pairing would yield short, tan offspring (ttrr) stands at;

=

=

= 0.0625

(B)

In pea plants, one is homozygous recessive for both traits, leading to the cross of Yy Rr × yy rr. Determine the green and round offspring percentage.

For Color, let:

Y = Yellow

y = Green

For shape, let;

R = Round

r = wrinkled

If a cross occurs between Yy Rr × yy rr. (yellow round and green wrinkled)

the ratio of green and round offspring will be;

If Yy Rr self-crosses; various traits (YR, Yr, yR, yr)

                   YR                    Yr                    yR                    yr

yr                 YyRr                 Yyrr                 yyRr                 Yyrr

yr                 YyRr                 Yyrr                 yyRr                 Yyrr

                   Yellow              Yellow            Green              Green

                   Round               Wrinkled        Round              Wrinkled

                   Thus, the percentage of green and round offspring based on the above is:

=

=

=

Phosphorus cycles through living organisms and the SOIL.

Explanation:

Phosphorus circulates through rocks, water, soil, sediments, and living beings. The phosphorus cycle constitutes a biogeochemical cycle illustrating phosphorus activity within the lithosphere, hydrosphere, and biosphere. It is a vital element necessary for all forms of life. In its phosphate form (PO4), it contributes to the structural framework that stabilizes DNA and RNA.