Biology 2013 Part B

in the cells of the human body, oxygen molecules are used directly in a process that 1. releases energy 2. digests fats 3. synthesizes carb molecules 4. alters the genetic traits of the cell

1

the accompanying diagram represents specialized cells in the surface of the leaf of a green plant. the main function of these cells is to: 1. change the size of the stomata to regulate water loss 2. close the storage to keep out dust and dirt 3. provide water in photosynthesis 4. allow newly formed glucose

1

if the population of hawks in this area increases their pray populations might decrease. later, with fewer, pray, the hawk population might decrease. the prey populations might then decrease. this is an example of: 1. an ecosystem completely out of balance 2. how ecosystems maintain stability over time 3. interaction between biotic and abiotic factors within an ecosystem 4. ecological succession

2

in the future, the current population of about ten pink land iguanas will probably 1. migrate to survive 2. become extinct bc of little genetic diversity 3. undergo evolution by natural selection 4. extinct bc too much genetic diversity

2

missing from the diagram of this ecosystem are the 1. biotic factors and decomposers 2. abiotic factors and decomposers 3. autotrophs 4. heterotrophs

2

one likely reason for the existence of these pink land iguanas today is that their ancestors 1. had the same variations as other iguanas but mutated to pink 2. had variations to present in other iguanas that allowed them to live more successfully than others 3. lives in other islands, without predators 4. less visible w camouflage

2

the accompanying diagram represents a sequence of events that occurs in living things. letter X represents: 1. inorganic molecules 2. organic molecules 3. biological catalysts 4. simple sugars

2

the testing that revealed that these iguanas are a separate species from the other iguanas present in the galapagos most likely included 1. genetic engineering 2. cloning studies 3. DNA analysis 4. the use of proper chromatography

3

which best identifies B on the graph: 1. niche of species 2. biodiversity 3. carrying capacity 4. number of populations

3

if a student supplies more light than was received during trial X a bad place on the graph represent the results would be most likely 1. shorter than bar X and to the left 2. shorter than X to the right 3. taller than X to the left 4. taller than X to the rught

4

which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning? 1. changes in pH and temperature cause the enzyme reaction rate to be too fast 2. temp. and pH determine amino acid sequences in enzymes 3. changes in pH will change the genetic instructions of enzymes 4. increasing the temperature and pH level can alter specific enzyme shapes

4

testosterone directly affects the: a. formation of a zygote b. changes within an ovary c. production of sperm cells 4. development of the placenta

c

state one possible reason for the increase in the number of breeding pairs of bald eagles in NYS

more food production

state one reason for population changes between years 5 and 10

parasites, disease, starvation etc.

identify the biochemical process occurring in this cell produces oxygen (plant)

photosynthesis

explain why the percentage of resistant bacteria increased over time

the resistant ones survived and reproduced

state what scientists might do to successfully combat bacteria resistant to vancomycin

use a new chemical