4. Giant tortoises live over 100 years in the wild and usually do not start to reproduce until around 40 years of age. Brown rats only live up to three years and can produce offspring after they are five weeks old. Suppose a brown rat had drifted to the Galápagos Island from the mainland at the same time as the tortoise. In which organism do you think speciation would likely occur first? Why?​

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.

density and pressure