I therefore concluded that high altitude causes the black form to survive better. Since then, they have established a large population. Comment on the ethical issues involved in making this decision. Area 2 is an area where four hedgehogs were introduced from the mainland in 1974. Pencil may be used for graphs and diagrams only.
Beetles that lived under the bark of elm trees spread the fungus. When most of the branches have lost their leaves and died, the roots are weakened and may also die. The question number s must be clearly shown. The name of the third amino acid in the sequence has been filled in. The third method was judged to be the most effective and likely to succeed in reducing hedgehog numbers. Register a Free 1 month Trial Account.
Write your answer to each question in the space provided. The four boxes on the bottom line of the diagram refer to substances in the soil. Explain how each factor has led to an increase in the hedgehog population. June 2013 Ocr Biology F214 Paper can be very useful guide, and june 2013 ocr biology f214 paper play an important role in your products. Do not write in the bar codes. Each sucker can grow into a new tree.
A farmer uses her grass meadow to raise sheep. Please write clearly and in capital letters. She wishes to make use of process F. This document consists of 24 pages. In a separate field she grows cabbages. Your answer should include both types of behaviour and make clear the advantages to the animals of your chosen examples. If additional space is required, you should use the lined pages at the end of this booklet.
However, melanic individuals occur which are black with two red spots. Although English Elm trees make pollen, they rarely produce seeds. Register a Free 1 month Trial Account. The problem is that once you have gotten your nifty new product, the ocr f215 june 2013 past paper gets a brief glance, maybe a once over, but it often tends to get discarded or lost with the original packaging. These sheep were raised on a small Scottish Island where they were kept along the seashore for most of the year.
The red form of the ladybird is therefore homozygous recessive at this locus bb. This tendency of elms to create suckers has been exploited by humans, who have separated the suckers, with roots attached, and used them to plant hedges and establish new woodlands. The question number s must be clearly shown. The total number of marks for this paper is 100. Approximately 25 million elm trees, most of the English Elm population, died within a few years of the arrival of this fungus. This behaviour may be innate or learned.
The sheep developed an unusual metabolism that allowed them to survive by eating seaweed. Explain why your method is an improvement. Where you see this icon you will be awarded marks for the quality of written communication in your answer. Make sure you know what you have to do before starting your answer. Show each step in your working. Why is the continued existence of rare breeds of farm animals desirable? The leaves on the upper branches of the tree then turn yellow and die. Describe the process of cloning plants by tissue culture.
. This is produced for each series of examinations and is freely available to download from our public website www. A student investigated the proportion of these colour forms in the ladybird population along a transect going up a hill near his school. The problem is that once you have gotten your nifty new product, the june 2013 ocr biology f214 paper gets a brief glance, maybe a once over, but it often tends to get discarded or lost with the original packaging. Suggest a crop she could plant that would allow process F to occur and explain how this would add nitrate to the soil. English Elms developed from a variety of elm brought to Britain from Rome in the first century A.