Biology Answers

You need to identify structures within a cell using a microscope. However, the image appears very blurry even

though you have a high magnification. What are some things that you could try to improve the resolution of the

image? Describe the most basic factors that affect resolution when you first put the slide onto the stage; then considermore specific factors that could affect resolution for 40⨯ and 100⨯ lenses.

name the psychologists involved in the experiments of photosynthesis

What is the difference between and exon and an intron?

The enzyme that is secreted from the small intestine and completes the action of another enzyme is secreted from stomach is?

"Increased Soil salinity happens due to accumulation of large amount of soluble salts in the soil. this can have a lot of harmful effects on plants such as retardation of the growth as a result of reducing the amount of water absorbed". Explain this based on what you have studied.

Which statement about nitrogen is FALSE?

1. Plants are the only organisms that need nitrogen
2. Nitrogen gas is abundant in our atmosphere
3. Some bacteria can convert nitrogen gas to usable nitrogen
4. Plants need nitrogen to make proteins

When animals die and their bodies are not fully decomposed, they…

1. turn into fossil fuels
2. turn into water
3. turn into soil
4. evaporate

Nitrogen Fixation:

1. The process by which nitrogen in the atmosphere is changed into a form that can be used by plants
2. The large source of carbon-based compounds found within natural and engineered, terrestrial and aquatic environments
3. Life
4. The movement of nitrogen through living and nonliving things

Which statement explains the most realistic way to model energy flow in an ecosystem?

1. A food chain is most realistic because many organisms eat one type of food, and energy moves through a single pathway
2. A food chain is most realistic because many organisms eat a variety of foods, and energy moves through different pathways
3. A food web is most realistic because many organisms eat one type of food, and energy moves through a single pathway
4. A food web is most realistic because many organisms eat a variety of foods, and energy moves through different pathways

The energy provided by the sun is captured in the cells of this organism.

• Algae
• Shrimp
• Bacteria
• Water

This organism helps other organisms in multiple ways because of its outputs from cellular respiration and digestive waste.

• Algae
• Shrimp
• Bacteria
• Water

Which of the following statements is TRUE about energy in an ecosystem?

• Energy can be recycled in the same way as matter
• All energy disappears from the Earth when used, which is why we need the sun
• Every 1 pound an organism consumes creates about 10 pounds of biomass for the next organism
• About 10% of energy in living things is transferred to the next living thing when eaten

Which statement best reflects what would most likely happen if shrimp were removed from the ecosphere?

• Everything would die
• Bacteria would experience an exponential increase in population
• Bacteria and algae would both decrease, and the water would become dirty
• Algae population would increase until it reaches its carrying capacity