Sustainability means developing practices which protect the environment while also providing for human needs. Which of the following changes would be most helpful in achieving sustainable agriculture?Clearing land for agriculture by cutting down trees instead of burning them
Rotating crops to replenish the soil with nutrients
Tilling the ground to remove weeds and create uniform crops
Growing crops that produce only renewable resources

Answers

Answer 1

Answer: Rotating crops to replenish the soil with nutrients

Sustainability means developing practices which protect the environment while also providing for human needs.
NOT:
Clearing land for agriculture by cutting down trees instead of burning them
Rotating crops to replenish the soil with nutrients
Tilling the ground to remove weeds and create uniform crops

Answer 2

Answer:

Answer:

B. Rotating crops to replenish the soil with nutrients

Explanation:

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15. Relate What natural selection process mighthave led to a smaller jaw with fewer teeth inhumans?

Answers

Natural selection is the process where the individuals with better traits survive ( in where they are ) while the individuals with less suited traits for that environment dies.

In your case, wouldn't the answer be something among the lines of "The humans with bigger jaws and more teeth found it difficult to eat or find enough food to satisfy their stomachs"? ( It makes sense. Usually, if the animal has bigger features, like mouth, and more teeth, they would need more food or nutrient to grow those bigger features. If one has bigger/more features, then that typically means they are bigger as well, which also means they need a bit more food. ^^ Yes, my logic is a bit weird, but it helps out. )

How would retaining extra cytoplasm enhance survival of a developing oocyte?

Answers

Answer: An extra cytoplasm enhance survival of a developing oocyte in such a way because cytoplasm serves as a reservoir of lipids, polysaccharide and lipids for the developing embryo.The more the cytoplasm content, more will be the nutrients for the developing embryo. The cytoplasm forms the yolk and provides nourishment to the developing embryo. As we know that the developing embryo requires more nutrition and the main source of nutrition is cytoplasm because the sperm has no reservoir of its own to provide nutrition to embryo.

Thus, an extra cytoplasm enhance the rate of survival of a developing oocyte.

Final answer:

Extra cytoplasm in a developing oocyte supports survival by providing necessary nutrients from fertilization to implantation, and energy for cell divisions transforming a zygote into an embryo. It also contains the mechanism preventing polyspermy, thereby ensuring successful fertilization and further development.

Explanation:

Retaining extra cytoplasm in a developing oocyte boosts its survival chances by supplying the zygote, formed post-fertilization, with essential nutrients needed during the period up to implantation into the uterus. This is crucial as the sperm solely contributes DNA and not cytoplasm at fertilization. Accordingly, the cytoplasm and all of the cytoplasmic organelles in the developing embryo, including mitochondria, are maternally sourced. Mitochondrial DNA is maternally inherited and critical for tracing biological lineage.

Upon fertilization, the larger amount of cytoplasm also provides energy and raw materials for the rapid cell divisions that take place in the zygote during its journey to the uterus. This process transforms the zygote from a single cell into a tightly packed sphere of cells referred to as a morula which consequently evolves into a blastocyst. The blastocyst implants in the uterine wall and further develops into an embryo.

Furthermore, the oocyte's cytoplasm possesses a mechanism to prevent polyspermy, the penetration of more than one sperm. Polyspermy leads to a triploid organism with three sets of chromosomes which is incompatible with life. Therefore, the cytoplasm plays a crucial role in ensuring successful fertilization and development of the embryo, making enhancing cytoplasmic retention essential for the survival of the developing oocyte.

Learn more about Extra Cytoplasm in Oocyte here:

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Which organ in the human body plays a dual role in both the digestive and respiratory systems? A) Liver. B) Lungs. C) Stomach. D) Pancreas.