5090_s18_qp_22
A paper of Biology, 5090
Questions:
9
Year:
2018
Paper:
2
Variant:
2
Login to start this paper & get access to powerful tools
1
The diagrams show the bud of an insect-pollinated flower and a magnified transverse section through the same flower bud. The transverse section was taken at the position shown by the dotted line. A B C D stem Complete the table to show the name of each of structures A to D and to state one function of each structure. letter name of structure function A B C D The diagram shows an incomplete transverse section through the stem of this plant. Complete the diagram by drawing and labelling the positions of each of the following tissues: • xylem, • phloem. State one function of xylem tissue.
16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants
Open
2
The diagram shows the human heart. The blood vessel labelled F may become narrowed as shown. narrowing of blood vessel F F Name blood vessel F. Name the disease caused by the narrowing of this blood vessel. State three factors that may lead to the narrowing of this blood vessel. Suggest and explain how a person might be affected by the disease caused by the narrowing of blood vessel F. It is possible to treat the disease caused by the narrowing of blood vessel F, by carrying out an operation. In the operation: • a balloon surrounded by a metal mesh is inserted into the blood vessel and inflated, • the balloon is then deflated and removed, leaving the metal mesh in place. blood vessel balloon hollow metal mesh Suggest the purpose of each of the following: inflating the balloon, leaving the hollow metal mesh in the blood vessel.
11. Transport in humans  →  11.2. Heart
11. Transport in humans  →  11.3. Blood vessels
Open
3
The table shows how the thickness of the lens of the eye changes when focussing on an object at different distances from the front of the eye. distance from eye / cm thickness of lens / mm 4.0 3.6 3.2 2.9 2.7 2.6 2.6 Describe the pattern shown by the data in the table. Explain how named components of the eye change the thickness of the lens when focussing on an object as it moves further from the front of the eye. As a person becomes older, the lens of the eye becomes harder and less elastic. This results in the person seeing an image of a close object that is out of focus. object image The diagram below shows how light is refracted by two types of artificial lens that may be used to manufacture spectacles . convex lens concave lens Suggest and explain which type of lens would be most suitable for this older person.
14. Coordination and control  →  14.2. Mammalian sense organs
Open
4
The graph shows the effect on crop yield (amount harvested) of using fertilisers that contain nitrogen. crop yield in kg / hectare mass of fertiliser in kg / hectare Use the information in the graph to describe the effect on crop yield of using an increasing mass of fertiliser. The nitrogen in the fertiliser is in the form of nitrates. Describe how the nitrogen in the fertiliser is absorbed by crop plants and used to give an increased yield. Suggest and explain why a farmer may decide to use a mass of fertiliser per hectare which is less than that needed for a maximum crop yield. Name one type of mineral ion, other than nitrate, that is required by a plant and state its importance to the plant. type of mineral ion importance to plant
6. Plant nutrition  →  6.3. Mineral nutrition
19. Relationships of organisms with one another and with the environment  →  19.2. Nutrient cycles
19. Relationships of organisms with one another and with the environment  →  19.1. Energy flow
Open
5
The diagram shows a section through the human body divided into regions P, Q, R and S. P Q R S Complete the table below by matching the letters from the diagram to the statements in the table. There may be one or more than one letter for each statement. contains an organ which region or regions … produces an acidic secretion R … contains villi … digests protein … produces insulin … contains bronchi … secretes amylase … ingests food
8. Human nutrition  →  8.2. Human digestive system
9. Human gas exchange  →  9.1. Human gas exchange
Open
7
Describe the cause of each of the following: Down’s syndrome, sickle cell anaemia. Parents, one with blood group B and the other with blood group A, have a child with blood group O. The parents decide to have another child. Complete the genetic diagram to show the possible blood groups for the second child of these parents. genotypes of parents x gametes possible genotypes of child possible blood groups of child State the probability of each of the following for the second child of these parents: being the same sex as the first child having the same blood group as the first child Name the type of inheritance shown by the alleles that produce the blood group AB.
17. Inheritance  →  17.3. Inheritance
Open