Andy KuoBiology BCR

BCR #1: The structure of DNA The building blocks of DNA are called nucleotides which are made up of a

phosphate group, a deoxyribose sugar, and one of the four nitrogen base. The shape of the DNA molecule is called a double helix, which are two

strands that twist in a spiral shape. There are only four types of nucleotides that make up the DNA molecule, and

each nucleotide can only connect with its complimentary nitrogen base. This way, it would prevent mistakes in copying the DNA because there wouldn’t be the wrong nucleotides connecting to each other.

BCR #2: The importance of NitrogenHypothesis: Planting legumes will increase the growth of your crops.Independent Variable: The amount of legumes you plant.Dependent Variable: How well your other plants grow.Controls: The same amount of soil, type of legumes, type of crop, same location, same amount of soil and water.Procedure:

1. Divide the soil into two different patches. 2. Plant legumes in one patch while not planting any legumes on the other.3. Plant the same crops into both patches.4. Care for both patches the same way.5. After two weeks, examine the height and health of the crops from both

patches.6. Conclude whether or not planting legumes will help the growth of crops.

BCR #3: The trouble with CO2 The Carbon cycle helps to explain how the amount of CO2 in the atmosphere

can change. The two cellular processes involved in the carbon cycle is photosynthesis and cellular respiration.

Carbon in the atmosphere is taken in by plants and algae in the ocean, which will be consumed by other organisms. By consuming these plants, the organisms are able to take in the carbon taken in by those plants. When the organism dies, it will turn into fossils which will return into the atmosphere either naturally or by human activities.

Increased human activities such as cutting down more and more trees will disrupt the carbon cycle because with less plants, there will create a bigger and bigger reserve of carbon in the atmosphere.

BCR #4: Mixotroph Algae The function of the chloroplast is to produce it’s own food from carbon

dioxide, water and light energy. The function of the mitochondria, on the other hand, is to create energy that can be used by the cell from sugars, water and oxygen.

The process that occurs in the mitochondria is called the cellular respiration while the process of the chloroplast is called photosynthesis.

The reactants of photosynthesis are carbon dioxide, water and light energy which is used to produced carbohydrates and oxygen. The reactants of cellular respiration is sugar, and oxygen. The products of cellular respiration is energy, carbon dioxide and water.

Andy KuoBiology BCR

BCR #5: The loss of bay grasses The loss of bay grasses will greatly affect the different organisms in the

food web. The bay grasses is the producer, the blue crab is the herbivore and the weakfish is the first level carnivore in this food web.

The bay grasses produces all the energy required in the food web. The blue crab and small fishes acts as the herbivores and eats the producers for food. The blue crab also acts as the 1rst level carnivore by eating clams, snails, shrimp and marine worms. The spot fish weakfish act as the 2nd level carnivores and eats the blue crab for their nutrients.

A decrease in bay grasses will cause a domino affect because with less producers, there will be less herbivores, thus causing a decrease in the number of carnivores.