<span>Answer: 1%</span>
<span>As per excerpts, Water covers 75 percent of Earth and 97 percent of water on Earth is salt water, meaning only 3 percent of water is available as fresh water. Based on this information, 3% of 75% of the water on earth is available as fresh water or 2.25%. Since most of the water is said to be locked up in solid glaciers and polar ice caps, the amount of water on the planet that is available for animals to drink is lesser than 2.25% so the best approximation is 1 percent.</span>
Answer:
25%
Explanation:
This cross is a dihybrid cross involving two genes in the guinea pig. One gene is coding for hair color while the other is coding for hair length.
The allele for black hair (B) is dominant over that of brown hair (b) while the allele for short hair (H) is dominant over that of long hair (h).
In a cross involving the parents with genotypes Bbhh (black long hair) and bbHh (brown short hair), both parents will undergo meiosis to produce gametes as follows:
Bbhh: Bh, Bh, bh, bh
bbHh: bH, bH, bh, bh
Using punnet square (attached picture) for this dihybrid cross, 16 offsprings will be produced. According to the question, an offspring with black and long hair phenotype will either have BBhh or Bbhh genotype.
Note that, in the heterozygous state of a gene, the dominant allele will express itself.
Checking the drawn punnet square attached, one will notice that the four circled offsprings have the above genotypes, hence they are phenotypically black and long haired.
Since there are 16offsprings and only four are black & long haired, we then calculate the percentage by saying:
4/16 × 100 = 25%
Therefore, 25% of the offsprings will be black and long haired.
Because by practicing, they control there breathe and also increase the volume of the lungs ! so , it is just practice, we can also have that type of lung by regular efforts !
Answer:
d
Explanation:
stomata help retain water so a plant in a rainforest will not need a lot of them.
The answer for this is C.