Answer:
D
Explanation:
D is the only option where the cause of the pollution is not something man-made.
Antigens; they are molecules that are foreign to the body, thus stimulating a response by the b- and t-cells that aim to defend the body against harmful and mostly foreign bacteria.
28. Part A.
A nucleic has a sugar group, a phosphate group, and nitrogenous base. A carbohydrate only has the sugar group units.
Part B
Nucleic acids make up the DNA and RNA which contain the genetic material for life.
Carbohydrates are used to provide energy to the cells.
Part C
Because all life require energy and this energy can be obtained from carbohydrates.
31
Part A
The phenotype will be red flower.
Part B.
Using the Punnett Square, the results are
RR, Rr, Rr, rr
There are 3 red flower plant for every 1 white flower plant
Part C.
He should cross a wild or pure breed red flower and white flower snap dragons.
Answer:
The species that make up an ecosystem are connected in complex 'food webs' of eater and eaten. When one species disappears, its predators can no longer eat it and its prey are no longer eaten by it. Changes in these populations affect others. Not only that but the ecosystem would be dramatically different or cease to exist altogether.
Cells with half the original number of chromosomes. So the answer is C.
