BIOLOGY HIGH SCHOOL

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? A)Clearing land for agriculture by cutting down trees instead of burning them B)Rotating crops to replenish the soil with nutrients C)Tilling the ground to remove weeds and create uniform crops D)Growing crops that produce only renewable resources

Answers

Answer 1
Answer:

The correct answer is (D)Growing crops that produce only renewable resources

The by products  of the crops such as corn stovers is used to produce energy without harming the soil quality or increasing the rate of soil erosion. The crops like sunflower, canola can produce bio-oil and bio-fuel which is a renewable fuel. This type of plants should be grown so that renewable resources can be produced. This means that this practice is sustainable as it is protecting the environment and also providing resources for human needs.
Answer 2
Answer: Clearing land is not a sustainable practice in any form, so not A. Crop rotation is important for maintaining soil fertility, but is not necessarily sustainable. It's definitely not C. It is likely D because using only renewable resources is top notch sustainability.

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A hydrangea plant has blue flowers when grown in acidic soil, but has pink flowers when grown in basic soil. A clone of the pink-flowered plant is grown in acidic soil and produces blue flowers. This change in flower color is most likely due to:_____a. sexual reproduction in the plants
b. resulting in variationasexual reproduction in the plants
c. resulting in variationgenes being expressed in different ways due to environmental conditions
d. a gene mutation that occurred after the clone was produced

Answers

Answer:

Option C, resulting in variation genes being expressed in different ways due to environmental conditions

Explanation:

Several genetic traits are affected by both internal and external environmental conditions. Some common examples are – height , color of eye, hair color, skin color, and even some genetic diseases.  

The internal environmental factors include – gender, temperature etc.

While the external environmental factors include drugs, chemicals, temperature, and light.  

Hence, the external environmental condition i.e pH of soil is producing different color of flowers in a given plant

Hence, option C is correct

The Siberian Husky is a medium dog, weighing between 16-27kg (35-60lbs). These dogs have strong pectoral and leg muscles, allowing them to move through dense snow. If they had heavier muscles, they would sink deeper into the snow and move slower. Yet, if they had lighter muscles, they would not be strong enough to pull sleds and equipment. This is an example of which type of natural selection? A)Directional selection



B)Stabilizing selection



C)Disruptive selection

Answers

The answer is B. Stabilizing selection. Stabilizing selection is a type of natural selection. Stabilizing selection is the opposite of disruptive selection where extreme values of a trait are favored over intermediate values. 

All of the following are examples of voluntary muscle movement except_______? Heart beating

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Arm picking up a glass

Answers

Heart beating. Voluntary muscle movement means you decide to move the muscles (ie: you have to think about the movement). You don't have to think about your heart beating, it just does it on it's own.

Where is the Golgi Body in an animal cell?

Answers

Answer:

The Golgi apparatus, also called Golgi complex or Golgi body, is a membrane-bound organelle found in eukaryotic cells (cells with clearly defined nuclei) that is made up of a series of flattened stacked pouches called cisternae. It is located in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus.

Explanation:

What is the term for the study of weather and climate

Answers

Meteorology would be youre answer hope it helps
Meteorology is the study of weather and climate.

The best explanation for all these offspring being female is that

Answers

The male had both Y chromosomes
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