Answer:
Water
Oxygen
Carbon dioxide
Lipids
Explanation:
The plasma membrane is a lipid bilayer with a hydrophobic core made of nonpolar tails of phospholipids. The plasma membrane allows only uncharged, small and hydrophobic substances to pass through it. Charged particles such as ions, polar molecules such as sucrose can not cross the hydrophobic core of the plasma membrane.
Oxygen and carbon dioxide gases have small sizes and can diffuse through the spaces between the tails of phospholipids of lipid bilayer of the plasma membrane without any transport proteins. Lipids are hydrophobic and therefore, do not need any transport proteins to cross the lipid bilayer. The small water molecules are also free to move through the membrane.
The correct answer would be A) or the first option.
Warmth and vegetation were the two big things. Since everything was ice, animals would've died of hypothermia or something, and the ice wouldn't allow any vegetation to grow. It's kind of like the dinosaurs; the plant eaters died b/c they didn't have any vegetation to eat, and the meat eaters died b/c they didn't have any meat to eat since the animals died. Same thing happened in the ice ages. Just with the added variable of freezing temperatures.
Answer: Option B) they lack a nuclear membrane
Polysome formation in bacteria is able to occur because they lack a nuclear membrane
Explanation:
Just as other prokaryotes, bacteria lack a well-defined nucleus and nuclear membrane. Thus, its ribosomes are held together by RNA during protein synthesis, and are altogether referred to as polysome.
Thus, option B is the answer