Patent ductus arteriosus occurs when the normal fetal circulation conduit between the pulmonary artery and the aorta fails to close and results in increased pulmonary blood flow. The clinical manifestations of patent ductus arteriosus include; Murmur; wide and bounding pulse pressure, Asymptomatic Heart failure.
It was during the Paleozoic Era that plants (first known from microfossils called cryptospores that appear in the mid-Ordovician, about 470 million years ago; Wellman and Gray 2000) and animals (known from Silurian fossils, at least 423 million years ago; Wilson and Anderson 2004) began to colonize the land
Answer:
C. channel protein - allow passage of material through the hydrophilic pore
Explanation:
Channel Protein is a transport protein that has an aqueous channel throughout its transmembrane molecule, which allows the free movement of certain ions or molecules through diffusion, allowing these materials to pass through the hydrophilic pore.
From this we can conclude that the correct answer to your question is the letter C.
Answer:
The correct answer is d. suggests that the time since divergence may not be sufficient for complete reproductive isolation to have occurred.
Explanation:
Polar bears are evolved from brown bear and grizzly bears are subspecies of brown bear so polar bears and brown bears are different species. These two species habitat is different so they are geographically isolated but due to the melting of ice by global warming, their niche started overlapping.
Commonly they do no reproduce with each other because of the reproductive isolation but they can produce viable hybrids called growlers and pizzlies if interspecies reproduction takes place which shows that the time interval since divergence is not enough that can make these two species completely reproductive isolated. So the right answer is d.
Answer:
Hope it helps!!
Explanation:
According to cell theory, what do each of the following organisms have in common? Each organism is able to photosynthesize. They are all made up of the same kinds of atoms. ... Cells are the basic unit of structure for each organism.
