Answer:
* Glucose may cause an increase in bacterial growth - HYPOTHESIS
* The bacterial colonies grown without glucose don’t have capsules around their cells - OBSERVATION
* Bacterial growth in the glucose environment increased rapidly and then stopped after some time - OBSERVATION
* Increased glucose may lead to capsule formation in bacteria - HYPOTHESIS
Explanation:
In an experiment, a HYPOTHESIS is a predictive and testable statement that aims to answer a scientific question while an observation is made based on the results obtained.
According to this question, Annie wants to study the effect of glucose on bacterial colonies. She conducted the experiment by growing two colonies of bacteria - one with glucose present in the environment and one in an environment without glucose. Based on this experiment, the following statements are categorized as:
- Glucose may cause an increase in bacterial growth is a HYPOTHESIS
- The bacterial colonies grown without glucose don’t have capsules around their cells is an OBSERVATION
- Bacterial growth in the glucose environment increased rapidly and then stopped after some time is an OBSERVATION
- Increased glucose may lead to capsule formation in bacteria is a HYPOTHESIS
The term ‘Crossing over’ was used by Morgan and Cattell. It is a process in which there is exchange of chromosome segments between non-sister chromatids of a homologous chromosomes. It occurs during pachytene stage of prophase I of meiosis cell division.
Significance of crossing over:
- Crossing over provides genetic variation in all sexually reproducing organisms.
- It creates new combination of genes or genetic recombination and produces hybrids.
Answer:
What is the pressure on the Lithospheric Mantle? The density of the lithosphere varies depending on temperature, depth and age. At about 50 kilometers (30 miles) below the Earth's surface, density measurements reach 200,000 pounds per square inch (13,790 bars)
Explanation:
The answer is amino acid.
Answer: [C]: "five-part radial symmetry" .
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