Answer: b. birds have beak adapted to break open hard shells.
Birds in the rain forests are adapted to perform different functions. It helps birds to capture their food, groom their features, defend their territories and attack predators. The shape of the beak defines a particular ecological niche of a particular bird. The shape of the beak are specially adapted to eat foods such as seeds, fruits, insects. The beaks becomes hard and pointed in order to break open pods, seeds, fruits available as food source in rain forests. Therefore, adaptation in beak allows birds to feed different types of food and allows them to switch to different sources of food if one source becomes scare in the rain forests.
Answer: B) They can get food and move
Explanation: Protozoa are single celled microscopic eukaryotic organisms which exhibit characteristics commonly found in plants and animals. Some of them undergo a process of photosynthesis like plants and others show the property of mobility and heterotrophy like animals.
Therefore, on the basis of above information they can get food and move is the correct option.
Answer;
-Tolerance to salinity
Explanation;
-The salt tolerance of a plant is often defined as the degree to which the plant can withstand, without significant adverse effects, moderate or high concentrations of salt in water on its leaves or in the soil within reach of its roots.
-Salts in the soil water may inhibit plant growth for two reasons. First, the presence of salt in the soil solution reduces the ability of the plant to take up water, and this leads to reductions in the growth rate.
Hyperpolarization is a change in a cell's membrane potential that makes it more negative. It is the opposite of a depolarization. It inhibits action potentials by increasing the stimulus required to move the membrane potential to the action potential threshold.
Explanation:
