- What houseplant is the safest to grow indoors where children are around? Choose only ONE best answer. A African Violet B Aloe C Sweet pea D Rose
- Syrups have higher sugar content than other oral liquids. True False
- 1. What is antibiotic resistance?How are bacteria able to survive when exposed to antibiotics? 2. During rainy years on the Galapagos Islands, small seeds became abundant. Only birds with small beaks can eat small seeds effectively. If the rain persists for several years, what do you expect to occur due to natural selection? Explain. 3. Two hypotheses that predict why some beetles survive applications of an insecticide are illustrated in the diagram below.Hypothesis 1 says that in a population of beetles,some beetles exist that are resistant to an insecticide. These individuals go on to reproduce generations of beetles that are resistant to the insecticide. Hypothesis 2 says that individual beetles develop mutation that protects them from the insecticide. These individuals go on to reproduce generations of beetles that are resistant to the insecticide. Which hypothesis is correct? Explain your answer. 4. Many organisms found in tidal pools along the west coast of Vancouver Island look almost identical to organisms found in tidal pools along the east coast of New Brunswick. Would you expect these species to be closely related? Explain your answer. 5. Identify each of the following as one of the five mechanisms that cause evolution in populations. Mechanisms can be used more than once. a. Organisms become adapted to their environment. b. The lack of genetic variability among cheetahs has been attributed to this. c. This often results in two adjacent populations having similar genetic variation due to immigration and emigration. d. The movement of humans all over the world can influence this. e. The original finches that were blown over to the Galapagos Islands from South America are an example of this. 6. What is Gene flow?How can gene flow change the allele frequency in a population of species? Give an example. 7. What is Genetic Drift?How can genetic drift change the allele frequency in a large vs.small population? 8. What is the difference between founder effect and bottleneck effect? Give an example for each. 9. Define the following terms with respect to Natural Selection: Stabilizing, Directional,Disruptive ( sketch a graph for each) 10. What is Speciation? Explain and describe the different pre-zygotic and post-zygotic reproductive isolating mechanisms. 11. A true cactus in Africa looks surprisingly like a distantly related euphorbia plant in a desert in Australia. Explain why this might have occurred. 12. What allows for allopatric speciation to occur?Give an example of where this has taken place. 13. You are studying two closely related monkey species in the tropical rainforest . They are not known to interbreed in nature. One species feeds and mates in the treetops of fruit trees.The other species feeds and mates in fruit trees as well.In captivity, these two species interbreed and produce viable, fertile hybrids Hypothesize what type of reproductive barrier could be keeping these species apart in nature. 14. Only about 8500 French settlers colonized the St. Lawrence River valley in Québec between 1608 and 1759. About six million people live there today. Some rare mutations have been identified in the population One is an autosomal recessive mutation affecting hearing and vision. How can you explain these rare mutations in the population? 15. A tan-coloured insect lives in a sandy area.Some insects in the population show some green in their coloration. The climate begins to cool and become moister. Slowly, the habitat is covered by green plants. Use Darwin's theory of evolution by natural selection to explain how the insect population might evolve to be green.
- Which factor(s)contribute to the expression of phenotypic variation within populations? Neither environmental nor genetic factors contribute to phenotypic variation Environmental factors contribute soley to phenotypic variation Genetic factors contribute soley to phenotypic variation Both environmental &genetic.factors contribute to phenotypic variation
- Question 1 (1 point) What kind of selection is thought to be responsible for the distribution of human baby weights at birth? Sexual selection Directional selection Stabilizing selection Unnatural selection Disruptive selection
