Increased death rate and predation if the birth rate is high
Answer:
body size
more
circulatory system
egg deposition
Explanation:
Because of their large <em>body size</em> , ancestral amphibians likely faced challenges supporting themselves out of the aquatic environment.
Although there was far <em>more</em> oxygen available to gills in air than in water, the delicate structure of gills couldn't be supported in the terrestrial environment.
The costs of locomotion on land and greater oxygen demand from enlarged muscles led to modifications of the heart and <em>circulatory system</em>
These early amphibians could not venture too far away from water because <em>egg deposition</em> was restricted to moist environments.
Answer:
50% or 1/2
Explanation:
<em> chance that they would have children with albinism is 50.</em>
A allele encodes normal pigmentation.
a allele encodes albinism.
An aa individual has children with an Aa individual
aa x Aa
Offspring = Aa, aa, Aa, and aa = 2 Aa + 2 aa (See the attached Punnet's square)
Based on the assumption that the A allele is dominant over the a allele, Aa individuals will have normal pigmentation while aa individuals will be albinos.
Hence,
<em>Percentage of their children that will have normal pigmentation </em><em>(Aa</em><em>) = 50% or 1/2.</em>
<em>Percentage of their children that will be albino (</em><em>aa</em><em>)= 50% or 1/2.</em>
Embryo sac , and other three degenerate !
Molecules that are hydrophilic (water loving) are capable of forming bonds with water and other hydrophilic molecules. They are called polar molecules. ... Small, nonpolar molecules (ex: oxygen and carbon dioxide) can pass through the lipid bilayer and do so by squeezing through the phospholipid bilayers.
