The cell membrane is selectively permeable.
Growth of the plumule does not occur until the cotyledons have grown above ground. This is epigeal germination. ... These seeds develop by the plumule growing up through the soil with the cotyledons remaining below the surface. This is known as hypogeal germination.
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.
Viruses do not have nuclei, organelles, or cytoplasm like cells do which is why they have no way to monitor or create change in their internal environment.
