Answer:
New discoveries of organisms or about organisms helped us to redefine the classification of organisms.
Explanation:
Organisms are classified on the basis of similarities and differences between them. If new things are known to the scientist about a particular organisms, so it is placed according to their characteristics in the system of classification. For example, if an organism is able to move from place to place so it is placed in kingdom animalia, but afer more research we know that it also contains chlorophyll which able him to make their own food like plants so this organism is placed in kingdom protista.
The correct answer is: None of the above
Soil formation is affected by many factors that include time, climate (temperature, precipitation), relief, mineral organic materials.
• Precipitation is part of the climatic factors. Precipitation refers to the amount of water (in the form of rain, snow) that a soil gets. Thus, it is one of the most important factor that determinates the formation and characteristics of soil. Precipitation affects both, the amount of erosion and weathering (breakdown of rocks and soil) that occurs.
• Time. It refers to changes of soil as it age. For example, older soils contain more organic matter and are more exposed to moisture and other environmental factors that may change their features.
• Erosion is removal and transportation of material from the Earth’s crust as a consequence of natural processes such as wind or rainfall. Because it includes the removal of the soil it affects its formation.
Answer: B
Explanation: Traits usually die off when they are unneeded by the organism, or if the trait causes harm to the organism's survival. Through natural selection, over time, the organisms with the best combination of traits for its survival will become the dominating species, and those with weaker traits may not survive long enough to pass off their traits to future offspring.
Answer:
1) Recursive definition: 
2) At the beginning of the 4th interval
Explanation:
1)
The initial population of the bacteria at time zero is
Here we are told that the reading is taken every two hours; we call this time interval "n", so
And also, after every time interval n, the number of bacteria has tripled.
This means that when n = 1,
And when n=2,
Applied recursively, we get
And substituting p0,
(1)
2)
Here we want to find at the beginning of which interval there are
bacteria.
This means that we can rewrite eq.(1) as
By simplifying,
Which means that
However, this means that the number of bacteria is 1,350,000 after 3 time intervals; therefore, at the beginning of the 4th interval.
