Answer:
A) 
B) 
C) 
or 
hours
Explanation:
A) The formula that can be used for bacteria after "t" hours is
Where ,
represents the population after "t" hours
represents the initial population.
represents the rate of growth of population
represents the time taken by the population to grow
B) Here let us first find the rate of population growth.
Thus, the population of bacteria after 5 hours
C)
Answer: Tree
Explanation: Trees produce sap, nuts and fruits.
Answer:
Option B, electrochemical signals
Explanation:
The first process that initiates the muscle contraction is the binding of calcium ion with troponin protein. After this chemical interaction, the active binding sites of actin gets exposed. After this myosin binds to the actin sites thereby forming a high-energy head bridge and releasing the pi. Mysosin now goes to a lower energy state by undergoing conformational change. This causes power stroke and actin filament is pulled towards the M-line. Later on the muscle contracts by shortening sarcomere.
This entire process is an electrochemical process. hence option B is correct.
Answer:
The most accepted theory about the origin of Earth is that it formed by a process called planetary accretion
Explanation:
The most accepted theory about the origin of Earth is that it formed by a process called planetary accretion. In this process, the Earth is believed to have been formed from a cloud of gas and dust that remained following the Sun's formation. This cloud of gas and dust is referred to as the solar nebula.
Differentiation refers to the process by which the various layers of the earth were formed; core, mantle, and crust
