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295 questions found · practise this subject as a set Show 20 · 50 per page

#	Question	Subject and topic	Difficulty
241	A country's age pyramid is urn-shaped, with a narrow base. What does this suggest about its population?	Biology/Biological Studies/Biotechnology/Biochemistry Population attributes	Easy
242	Which of the following is an attribute of a population but not of an individual organism?	Biology/Biological Studies/Biotechnology/Biochemistry Population attributes	Easy
243	A pond had 40 frogs at the start of a year, and 10 new frogs were added by reproduction during the year. What…	Biology/Biological Studies/Biotechnology/Biochemistry Population attributes	Medium
244	In a laboratory population of 50 fruit flies, 5 flies died during a week. What is the death rate?	Biology/Biological Studies/Biotechnology/Biochemistry Population attributes	Medium
245	An ecologist wants to compare the size of a population of one huge banyan tree with that of 200 small Parthen…	Biology/Biological Studies/Biotechnology/Biochemistry Population attributes	Hard
246	Which equation describes logistic population growth?	Biology/Biological Studies/Biotechnology/Biochemistry Population growth	Easy
247	A population growing with unlimited resources produces which kind of growth curve?	Biology/Biological Studies/Biotechnology/Biochemistry Population growth	Easy
248	A population has 500 individuals. During a year there are 60 births, 40 deaths, 10 immigrants and 20 emigrant…	Biology/Biological Studies/Biotechnology/Biochemistry Population growth	Medium
249	Which organism breeds only once in its lifetime?	Biology/Biological Studies/Biotechnology/Biochemistry Population growth	Medium
250	A population follows logistic growth with r = 0.5 per year and carrying capacity K = 1000. What is its growth…	Biology/Biological Studies/Biotechnology/Biochemistry Population growth	Hard
251	The relationship between a cuckoo and a crow, in which the crow incubates the cuckoo's eggs, is called	Biology/Biological Studies/Biotechnology/Biochemistry Population interactions	Easy
252	In which interaction does one species benefit while the other is neither harmed nor benefited?	Biology/Biological Studies/Biotechnology/Biochemistry Population interactions	Easy
253	Five closely related warbler species live in the same tree, but each feeds in a different part of the canopy.…	Biology/Biological Studies/Biotechnology/Biochemistry Population interactions	Medium
254	Which pair shows mutualism?	Biology/Biological Studies/Biotechnology/Biochemistry Population interactions	Medium
255	A prickly pear cactus introduced into Australia spread rapidly over large areas until a cactus-feeding moth f…	Biology/Biological Studies/Biotechnology/Biochemistry Population interactions	Hard
256	The vertical distribution of different plant species at different heights in a forest is called	Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems	Easy
257	Which of these is a man-made ecosystem?	Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems	Easy
258	In a pond, decomposers such as fungi and bacteria are most abundant	Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems	Medium
259	Which statement about the functioning of an ecosystem is correct?	Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems	Medium
260	A student sets up a sealed glass aquarium with water plants, snails and microbes and keeps it in the dark for…	Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems	Hard