Waterproof skin and waterproof eggshells.
Adaptations
adaptation
The behaviors and physical characteristics of species that allow them to live successfully in their environment are called adaptations. These adaptations can include traits such as camouflage, specialized feeding mechanisms, or migration patterns that help increase an organism's chance of survival and reproduction.
Colonise land.
That depends on the animal and the environment. Each animal has its own set of characteristics which suit it to its environment. For example, a dolphin has certain characteristics which make it well suited to live in the ocean, rather than on land. Similarly, a gorilla has certain characteristics which make it well suited to live on land rather than in the sea.
Less dense than oil and does not allow oxygen in.
What characteristics allow bugs to be placed in the same group?Read more: What_characteristics_allow_bugs_to_be_placed_in_the_same_group
ewan ko sayo
Ability to breathe air.
Agility and speed are the characteristics that allow the body to move and change direction quickly.
Hard shelled or leathery eggs that can incubate/hatch outside of water, allowing them to migrate dry areas. Skin that prevents transpiration, allowing them to live on land without dehydrating. These would be primary...the third could be any of a number of adaptations, changes in locomotion, eye sight et cetera
The oldest rock at the highest elevation is typically due to its resistance to erosion compared to surrounding rocks. This may be because the rock is more resistant to weathering and erosion processes or because it is harder and more durable compared to other rocks in the area. These physical characteristics allow the oldest rock to remain at higher elevations over long periods of time.