B. natural selection
C. selective breeding
D. inheritance of acquired characteristics
What observation did Darwin make that suggested there had been geological changes in Earth's history?
A. giant tortoises
B. fossils of giant sloths
C. fossil shells on top of mountains
D. an absence of rabbits in South America
Answer 1 : D) Inheritance of acquired characteristics
Jean-Baptiste Lamarck propose a mechanism by which gradual change of species may occur.
According to him the traits an organism gained during its lifetime could be passed to its offspring.
Example: If a giraffe stretched its neck gradually by stretching to reach leaves for many years, Lamarck believed the offspring may have longer necks.
Answer 2: A) Giant Tortoises
Charles Darwin visited Galapagos Islands in 1835. During his visit he observed that different species were in a constant battle for survival with each other, and because of that battle there was a variation in the tortoise that live on the sand and those that live in the water.
Competition is when two species require the same limited resources and can reduce overall health. In biology, it refers to the interaction between species that negatively affects the population size or health of one or both species.
The correct answer is c. Competition.
In biology, competition refers to the interaction between two or more species that require the same limited resources and can negatively affect the overall health or population size of one or both species.
For example, in a forest, two species of birds may compete for the same nesting sites or food sources, leading to a decrease in the reproductive success or survival of one or both bird species.
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Ian would take DNA samples from the inside of the suspects' mouths if he were asked to swab their buccal surfaces.
Identification and comparison are the two techniques forensic scientists utilize when assessing tangible evidence. Determining a substance's physical or chemical identity is the process of identification. Finding out whether two or more objects have a common origin is done through comparison.
In regard to matching, DNA analysis is comparable to fingerprint analysis. The evidence gathered at the crime scene is contrasted with a "known" print or sample when a suspect is identified using DNA or a fingerprint.
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B. plant
C. virus
D. bacteria