I had just learned this! The answer is D.
Answer:
Option A, Key stone
Explanation:
A keystone species plays a major role in an ecosystem as it is the species whose presence effects all other species in the ecosystem .In general a keystone species is always a dominant predator that feed on prey population. If it is removed, the prey population will explode and the population diversity will reduce. For example - bison, prairie dog etc.
Hence, option A is correct
The answer is B
Germination is when a seed starts to grow after a period of dormancy
After suffering a broken wrist the sequence of the phase healing include 1.inflammatory response these help to eliminate initial cause of cell injury
2. fibroblastic response It produces the abundant type (II) collagen which fill the defect left by open would
3.maturation remodeling it removes unnecessary vessels formed by apoptosis
Out of the following given choices;
A)pH
B)ion gradient
C)salt concentration
D)water concentration
The answer is; D
Water has a high heat capacity, meaning the energy required to raise the temperatures of a unit mass of water by one degree is high (compared to other elements). This way, water act as a good buffer to temperatures because it gains heat slowly and loses heat slowly.
