Answer:
Caves normally apear black. Yes, this is because in a cave there are no natural sunlight or lights in a cave. For example, If your room was all dark it would look black...yes. Same with a cave! It will appear black as well. So, as you can see, Caves appear black because it is so very dark inside no lights nothing. So that is why it looks black.
Explanation:
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-Lea.
Answer:
The options including the genotypes are not included. On a general note, three genotypes that are possible for this trait including their phenotype is:
WW- Wide wings
Ww- Wide wings
ww- thin wings
Explanation:
This question involves a single gene coding for wings width in a certain bird. The allele for wide wings (W) is dominant over the allele for thin wings (w). This means that allele 'W' will always mask the expression of allele 'w' in a heterozygous state.
There are three possible genotypes considering this trait.
WW- homozygous dominant genotype which wings will be phenotypically wide because it contains a combination of same dominant alleles.
Ww- heterozygous dominant genotype which wings will be phenotypically wide because I this combination of alleles, the W allele will always express itself phenotypically over allele 'w' considering the dominance of W.
ww- homozygous recessive genotype which wings will be phenotype thin because it contains a combination of same recessive alleles.
N.B: a recessive trait will only be expressed in a homozygous condition.
The process starts when DNA is wrapped around special protein molecules called histones<span>. The combined loop of DNA and protein is called a </span>nucleosome. Next the nucleosomes<span> are packaged into a thread, which is sometimes described as "beads on a string". The end result is a fiber known as </span>chromatin<span>.</span>
The human population has grown more and more quickly over time since the development of agriculture.
Option (a);
<u>EXPLANATION:</u>
- The growth in agriculture allowed an increase in population over time.
- Agriculture developed with more irrigation facilities and farming machines.
- So, more food could be grown and was available round the year for the
- people to consume.
- With urbanization, food could be transported well across the places.
- A smaller number of people died due to starvation. People settled in towns and cities to do farming.
- Thus, with the overall development of agriculture eventually, health and nutrition improved which led to an increase in population.
<span>facilitation. This simply means that due to the Earths atmospheric changes, the trees are not likely to be able to spread as they naturally would, facilitation is simply helping that process along so that it occurs as it should.</span>
