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Bio 101: Harvard

Subjects : science, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Continuous within Bowman's capsule - Loop of Henle






2. Species change over time - divergent species share a common ancestor - change is produced by natural selection






3. The Origin of Species 1859

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4. Major cell movement - 3 germ layers form






5. Cover inner and outer surface areas - secrete substances - selective barriers - transport - cilia or sensory






6. Body temp changes with enviro - BMR measured at standard temp for each species - SMR or standard metabolic rate (fish - ambhibia - reptiles)






7. Daily decline of body temp to save energy (bouts of torpor last mustiple days in hibernation)






8. Sum of all alleles






9. Proportion of allele in population






10. Shifts mean towards one extreme (positive selection) ie long horned cows






11. Self fertilization - homozygous genotypes increase - heterozygous genotypes decrease






12. Cells or organisms having two sets of chromosomes






13. In ECM - protein fibers makeup cartilage and bone (mineralized) - ECM of plasma liquid - Adipose=fat cells - energy storing






14. Populations do






15. Does not change the encoded amino acid. Occurs at highest rate (also synonymous substitution)






16. Cluster of interconnected fenestrated capillaries - supplied by afferent arteriole - drained by efferent arteriole - podocytes form filatration slits






17. Reuglated rise in body temp caused by a rise in the hypothalamic set point for metabloic heat production (fights pathogrens - and increased production of white blood cells)






18. Inherited but no use (whale pelvis)






19. Changes set point altogether (being awake - daytime activity - disease - skin temperature)






20. Native to one location and no where else






21. When an organisms phenotype influences ability to attract mates






22. Heat transfers to a surrounding medium ie air or water via surface






23. Changes at the DNA - RNA and protein scale






24. Reuglated rise in body temp caused by a rise in the hypothalamic set point for metabloic heat production (fights pathogrens - and increased production of white blood cells)






25. Prolonged energy source for many tissues - and brain - less protein breakdown required






26. One loci






27. 1. No mutation 2. No differential selection among genotypes 3. There is no gene flow 4. Population size is infinite 5. Mating is random






28. Number of individuals per unit of area/volume (dynamic - change over time)






29. A process in cell division during which the number of chromosomes decreases to half the original number by two divisions of the nucleus - which results in the production of sex cells






30. What organisms look like and how they behave






31. Releases fatty acids to diffuse into cells of the body - some used during absorptive phase for energy






32. Occurs when ingested nutrients enter the blood stream from the GI tract






33. 2NAA + NAa/2N is p and 2aa + NAa/2N is q (however similar frequencies can have very different genotype frequencies)






34. Neurons (generate and conduct electrical signals) and glial cells (release chemical signals)






35. Human based selection (ie cows with more milk or high fat content)






36. Short term control of feeding - stretch receptors in stomach and small intestines sens signals to the brain - realease hormones to supress appetite






37. Actively regulate osmolarity of their extracellular fluid (300 Mosm/L)






38. Migration of individuals and movements of gametes between populations (can add new allelles or change Allele frequency)






39. One loci






40. Stable temperatures






41. Does not change the encoded amino acid. Occurs at highest rate (also synonymous substitution)






42. Actively regulate osmolarity of their extracellular fluid (300 Mosm/L)






43. Environments where species can survive within their geographic range






44. 1. Most variation caused by neutral changes - do not confer advantage or disadvantage. 2. Since netural mutation is constant - can be used as a molecular clock to calculate divergence btwn species. 3. Neutral mutations not dependent on population siz






45. Copies of genes that are no longer functional






46. Amplifies deviation frokm set point






47. Any change in the nucleotide sequences of an organism's DNA (deleterious - neutral - beneficial)






48. BMI of 30 or greater






49. Thermostat of the brain (when cooled - constricts blood vessels in skin and increases metabolic heat production= body temp increases)






50. Location (pelvis in fish)-- Where gene effects - BMP4 causing webs to apoptosis







Sorry!:) No result found.

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