Other Biology Answers

If the producer level of a pyramid has 12,000 J of energy available, how much would be available to secondary consumers? (HInt: work this out on your scratch sheet of paper on a pyramid)

A DNA sequence cut with EcoRI restriction enzyme can be cloned into a plasmid cut with any restriction enzyme. False True

Discuss on the effect of climate change on agriculture.

Say what climate change means, causes of climate change and the effect and how to subdue it

1. How do you calculate magnification?
2. What is the orientation of the e in the microscope?
3. The slide is on 4X objective. Adjust the coarse focus then the fins focus until you get it clear. What did you discover about the adjustment?
4. Now move to 10X. what happened to the “e”. How much much can you see?
5. When you went to the 10X did you need focus?
6. Play with the the light adjustment (the diaphragm). what happened when you move the night adjustment to the left? to the right?
7. What do you do if the light is too dull or bright?
8. What happened to the e? How much can you see?
9. A microscope has 20X ocular (eyepiece) and an objective of 10X. What is the magnification?
10. A microscope has 20X ocular (eyepiece) and an objective of 43X. What is the magnification?
11. Explain Why the light microscope is also called the compound microscope?
12. Explain what happens to the “e” when you look at it under the microscope

Website if needed- ncbionetwork.org/iet/microscope

1. what is one of the most important parts of a microscope?
2. What is the typical power of the eyepiece?
3. How do you carry a microscope?
4. what does the course adjustment do?
5. what does the course adjustment do?
6. what does the fine adjustment do?
7. what are the objective lenses?
8. what is the stage?

Black hair (B) is dominant to red hair (b). If there are 175 black haired people in a population of 250: (Answer in percent or decimal).

A. What is the predicted frequency of heterozygotes? 

B. What is the predicted frequency of homozygous dominant? 

C. What is the predicted frequency of homozygous recessive?

A population of birds contains 23 animals with red tail feathers and 66 animals with blue tail feathers. Blue tail feathers are the dominant trait. (Answer in percent or decimal)

A. What is the frequency of the red allele?

B. What is the frequency of the blue allele?

C. What is the frequency of heterozygotes?

D. What is the frequency of birds homozygous for the blue allele?

A population of squirrels may be brown (the dominant phenotype) or red (the recessive phenotype). Brown squirrels have the genotype BB or Bb. Red squirrels have the genotype bb. The frequency of the BB genotype is 0.46.

A. What is the frequency of heterozygous rabbits?

B. What is the frequency of the B allele? 

C. What is the frequency of the b allele?

1) Deforestation results in an increase of greenhouse gases because fewer trees means

less carbon dioxide is released into the atmosphere.

less carbon dioxide is removed from the atmosphere.

less glucose is released into the atmosphere.

less oxygen is removed from the atmosphere.

2) As Earth'stemperatures warm, Arctic ice is melting. What is the long-term result of this process?

Animals have more places to live.

Water levels go down.

Water levels rise and cover coastal lands.

There is no change.

3) If a forest fire destroyed a deciduous forest, what long-term effects might the forest ecosystem experience?

The ecosystem would be lifeless because animals would not relocate into this ecosystem.

Large mammals and snakes would be the dominant animal populations relocating into this ecosystem.

Weeds and grasses would begin to grow and the ecosystem would be restored over time.

Fast-growing plants would be the only plants would the ability to survive in this forest.

4) A pond that suddenly has an increased growth in algae probably was polluted by —

people dumping waste oil in the pond.

a diseased animal.

an increase in chromosomes.

people over-fertilizing their lawns nearby.

5) The series of changes that occurs in an area where no soil or organisms exist is called —

primary succession.

carrying capacity.

commensalism.

secondary succession.

6) This diagram is of succession from field to forest. You may not see all of the aspects of each stage in the diagram.

(The image address)

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There is A,B, C, D, E. Pick which of the following should go in each place.

Oak trees

Wild Flowers

Pine Trees

Lichen

Shrubs

Phosphate Buffered Saline (PBS) is a commonly used buffer for experiments in biology because its pH and ion concentrations are similar to those in mammalian organisms. It works in a similar fashion to the blood plasma buffer mentioned in the textbook, but using dihydrogen phosphate ions and hydrogen phosphate ions for buffering through the following chemical reaction: H2PO4 - (aq) ⇆ H + (aq) + HPO4 2- -(aq) The equilibrium arrows depict that the phosphate ion (H2PO4- ) is dissociating further into two component ions in solution, but at the same time H+ and HPO42- ions are combining simultaneously to form phosphate in solution. So, at any given point in time, and under the appropriate conditions, there is an equal quantity of dissolved ions and combined ions in solution. There is therefore always a hydrogen ion donor and an acceptor in solution. Based on the equation above, which ion plays the role of hydrogen-ion donor (acid) and which ion plays the role of hydrogen-ion acceptor (base) in PBS?