19. Organisms and their environment
A section of Biology, 0610
Listing 10 of 662 questions
shows a food web. snake bird spider frog dragonfly aphid flowering plant tree beetle caterpillar Complete Table 5.1 using the information in . One has been done for you. Table 5.1 number shown in producers herbivores primary consumers carnivores State the name of one organism in which obtains its energy from eating three different organisms. A disease killed most of the snakes in the food web in . Complete the sentences by circling the correct words in bold. The first one has been done for you. The population of snakes increases / decreases / stays the same . The population of spiders increases / decreases / stays the same because there is less predation / food / competition . The population of caterpillars increases / decreases / stays the same because there is more predation / food / competition . Decomposers are not shown in the food web in . Complete the definition of the term decomposer. A decomposer is an organism that gets its from dead or waste material. shows a food chain. cabbage caterpillar bird Table 5.2 shows the number of organisms in this food chain and some of the information needed to draw a pyramid of numbers. Table 5.2 organism number of organisms width of bar in pyramid / mm bird caterpillar cabbage Complete Table 5.2 by calculating the missing value and writing it in the table. Complete the pyramid of numbers on the grid for the food chain shown in using the information in Table 5.2. The bar for the cabbage has been done for you. Label the organisms on the pyramid of numbers.
0610_w20_qp_32
THEORY
2020
Paper 3, Variant 2
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shows a marine food web. shark mussel zooplankton sardine phytoplankton octopus limpet algae Place ticks (✓) in the boxes to show the correct descriptions for the organisms shown in . organism carnivore herbivore producer tertiary consumer algae zooplankton shark Construct one food chain from that contains four organisms including the octopus. Identify one organism in that feeds at the second and third trophic levels. State the name of the type of organism that gets its energy from dead organic material. State the principal source of energy in most biological systems. Outline ways humans can directly impact food webs.
0610_w23_qp_32
THEORY
2023
Paper 3, Variant 2
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shows part of a food web for a coral reef. Algae and plankton are producers. large fish sharks turtles small fish starfish sea urchins sea cucumbers algae plankton Using the information in , identify: an organism that feeds at the third trophic level a herbivore a carnivore an organism that is a primary consumer and a secondary consumer. State what the arrows in represent. Using the information in , construct a food chain containing five organisms. Do not draw the organisms. State the name of the process used by some producers to convert energy from light into chemical energy. State the name of the type of organism that gets its energy from dead or waste organic material. The large fish in the food web is the coral grouper, Cephalopholis miniata. is a photograph of a coral grouper on a coral reef. Coral groupers are a popular food fish for humans. spot Overharvesting of the large fish would cause the turtle population to decrease. Using the information in , explain why the turtle population would decrease. Coral groupers developed over time from a species of fish with very few spots on their bodies. Complete the sentences to explain how coral groupers developed. The fish species with few spots had genetic variation in their population. When these fish , some of the offspring were born with more spots than others. Fish with more spots were better adapted to the because predators were less likely to see them. Fish with more spots had a greater chance of passing on the for more spots to the next generation. This process is called selection.
0610_w24_qp_31
THEORY
2024
Paper 3, Variant 1
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Questions Discovered
662