The right option is; an experimental investigation, because it allows for the control of variables.
The best type of scientific investigation for Bena to use to study this is an experimental investigation, because it allows for the control of variables.
Experimental investigation is a type of scientific investigation in which variables are controlled, modified, and measured in order to obtain facts to buttress or oppose a causal relationship. Experimental investigation includes all the parts of an experiment such as observations, scientific question, hypothesis, procedure, variables (independent and dependent) etc.
There appears to still be a lot of debate within science over whether humans or climate change were primarily responsible for the extinction of many of the large mammals during this period. One hypothesis supporting the link to early human hunters is that large animals in sub-Saharan Africa co-evolved with humans as they learned how to use tools and developed ever more effective weapons. When early humans moved into Europe and Asia, taking with them their weapons and hunting skills, the populations of large animals in those areas were not accustomed to human hunting, and were therefore easy prey.
Answer:
The answer is C. The cell took in another ancient prokaryotic cell, which began living inside it.
Explanation:
- The Endosymbiont Theory explains the evolution of membrane bound organelles such as mitochondria and chloroplasts.
- According to the theory, mitochondria evolved when an ameoba like organism engulfed bacteria capable of cellular respiration.
- Similarly, chloroplasts were developed when the ameoba like organism engulfed cyanobacteria or blue-green algae capable of photosynthesis.
- These organisms survived inside the ameoba over millions of years to develop into mitochondria and chloroplasts.
- The fact that mitochondria and chloroplasts have their own circular DNA and ribosomes is evidence of the endosymbiont theory.
Restriction enzymes are found in many different strains of bacteria where their biological role is to participate in cell defense. These enzymes restrict foreign (viral) DNA that enters the cells by destroying them.