Rough and smooth ER is the two kinds
<span>The extracellular fluid would have more salt. This would be because more of the sodium would be found in the blood than in the cells. Keeping a static level of sodium in the bloodstream is necessary for the proper cell activities, but increasing sodium intake can lead to negative effects.</span>
For the last question it's either C or D.
A) 100% red pigment
b) 75% black pigment
c) 25% of offspring is expected to lack both red and black pigments in their skin
Answer:
a) Teeth arose from the rough scales of ancestral sharks.
b) Skeletal developments leading to the amphibian movement onto land probably evolved from lobe-finned fishes.
d) The anterior gill arch formed the basis for the evolution of the vertebrate jaw.
Explanation:
The animals we know today have physical characteristics that are evolutionary adaptations of characteristics of their ancestors, which have undergone a series of evolutions and modifications over the years giving rise to new species that have resulted in the species we know today. This process of evolutions and adaptations also happened with the ancestral species of fish, which allowed that today, they had characteristics such as teeth and jaws. Many of these evolutions occurred even in different species, such as the evolution that allowed the amphibians to have a skeleton, which evolved from the spine fins of fish.