Welcome to your Eduqas Component 2 Quizz 1 The site where male gametes are produced in flowering plants Anthers Ovules Carpel Receptacle Select the incorrect statement from the following. Reproduction in prokaryotic cells happen through meiosis or mitosis. Mitosis is a controlled process. Uncontrolled cell division can lead to the formation of tumours and of cancers. Many cancer treatments are directed at controlling the rate of cell division. The stage of mitosis where chromosomes line up across the equator of the spindle. Metaphase Anaphase Interphase Prophase Your new question! The G-1, S and G-2 phases of the cell cycle are known collectively as _________. Interphase Prophase Metaphase Anaphase Mitosis takes place during the ____ phase of the cell cycle. M S G-1 G-2 Which of the following gives rise to genetic variation in a population? a) crossing over and independent assortment in meiosis b) different environmental conditions c) random mating and fertilisation d) mutation a,c & d b,c & d a,b & c All of the above Chromosomes line up at equator during Metaphase Prophase Ananphase Telophase Twisting, breaking and rejoining of two chromatids during meiosis is called crossing over breaking over joining over twisting over Release of cortical granules in the space betweeen cell membrane and zona pellucida prevents polyspermy monospermy aspermy fusion Pollen tube is formed by interaction of pollen and stigma stigma and style style and ovary pollen and ovary Which process does the plant cells use to get their cell wall building materials to the outside of the cell surface membrane? Exocytosis Diffusion Osmosis Endocytosis Cytoplasmic bridge between adjacent plant cells is called plasmodesmata gap junctions desmosomes tight junctions Which of the following diseases is not caused by a virus? Cholera HIV/AIDS Measles Small pox In prokaryotes, transcription and translation take place in Cytoplasm Mitochondria Nucleus Nuleolus The diversity of alleles within the genes in the genome of a single species. Genetic diversity Species diversity Species richness Biodiversity Which of the following is not a major threat to the biodiversity? Rise in bacteria with antibiotic resistance Climate change Habitat loss Overexploitation The role of an organism in an ecosystem. Niche Ecosystem Species Community Variations of alleles within a species is called Genetic diversity Species diversity Ecological diversity Allele diversity Changes in the organism which help them to survive and reproduce successfully in a new environment is called adaptation acclimatization resistance vulnerable Number of dark coloured or white moths increase or decrease as per background because of camouflage mimicry habitat habit Grouping of organisms based on similarities and dissimilarities is called Classification Taxonomy Systematics Naming Protection of species in their natural habitat is called in-situ conservaion ex-situ conservation in-vivo technique ex-vivo technique Lemurs are found naturally only on the island of Madagascar Galapagos western ghats eastern ghats Hibernation in winter and aestivation in summer are examples of physiological adaptation behaviuoral adaptation species adaptation genetic adaptation Which of these terms defines the role of an organism in its ecosystem? Niche Habitat Biotic Biome Physical barriers are the root cause of Reproductive isolation Adaptive mutation Primary succession Interbreeding Comparitive biochemistry of order of nucleotide bases in DNA can be used as Evidence for evolution Evidence for Global warming Evidence for speciation Evidence for Climate change Allopatric speciation can be a result of Mutation due to reproductive isolation Mutations of the whole species Mutations within two populations Muations to escape predators Self-fertilization in plants can lead to Sympatric speciation Allopatric speciation Peripatric speciation Artificial speciation Cementing material present between adjacent plant cells that helps to hold them together middle lamella cell wall plasmodesmata pits The energy remaining after respiratory loss of plants cannot be available to snakes goats fungi bacteria The loss of most of the chemical energy stored in the consumer’s food is not due to Availability of water Incomplete ingestion of food Incomplete digestion of the food Loss to the environment Time is Up!