Tina conducted an experiment to test her hypothesis. Her hypothesis was that by crushing aspirin and putting it into potting soil increases the growth rate of tomato plants. The results of the experiment show that there was no significant difference in the growth rates between the control and the experimental groups. What should Tina do with the results of this experiment?

Answer:

All Red

Explanation:

If both the parents have progeny with red seeds and white seeds in the ratio 3:1 then it implies that both the parents are phenotypically having all red seeds while their genotype will be Rr & Rr i.e. heterozygous.

The reason why they produced progeny with white seeds even though they both are having all red seeds is because they both have one recessive allele (r) which was masked by their dominant allele (R) in thembut when they were crossed some of the progeny which received both the recessive alleles (rr) produced white seeds because those progeny did not have dominant allele (R) which could mask the expression of recessive allele. In rest of the progeny, there was at least one dominant allele which did not let recessive allele to express and all those progeny produced red colored seed.

The Punnett square diagram is attached.

It is clear from the diagram that 3 (RR, Rr & Rr) out of the 4 probable progeny have red seeds while only 1 (rr) has white seeds so red: white ratio is 3:1

Answer;

D. The Open Marine ecosystem

Explanation;

An ecosystemis the lowest level of environmental complexity that includes living (biotic factors)and nonliving factors (abiotic factors).

-The Open marine ecosystem contains the fewest photosynthetic producers, this is because most producers can't live or survive in an areas with the lack of nutrients or sun light. They need nutrients for growth and also sunlight to undertake the process of photosynthesis which helps them make their own food.

Final answer:

The D. open ocean is the marine ecosystem that contains the fewest producers, such as phytoplankton.

Explanation:

Marine ecosystems are diverse and complex aquatic environments found in oceans, seas, and coastal regions. They support a wide range of life forms, from microorganisms to large marine mammals. These ecosystems play critical roles in Earth's climate regulation, nutrient cycling, and food production, making them vital for global ecological balance.

The marine ecosystem that contains the fewest producers is the open ocean. The open ocean is characterized by low levels of nutrients and sunlight, which limits the growth of producers such as phytoplankton. Instead, the primary producers in the open ocean are photosynthetic bacteria and archaea, which can thrive in these extreme conditions.

Learn more about Marine Ecosystems here:

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