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QUESTION 1 In prokaryotes deoxyribonucleic acid (DNA) is found as unbound circular DNA in the (A) mitochondria. (B) chloroplasts. (C) nucleus. (D) cytosol.
QUESTION 2 Which form of inheritance usually determines traits that display continuous phenotypic variation? (A) polygenic (B) sex-linked (C) multiple allele (D) incomplete dominance
QUESTION 3 A genome is defined as (A) the molecular unit of heredity. (B) all the genetic material in the chromosomes of an organism. (C) the sequence of triplets of DNA nucleotides that make up a gene. (D) the combination of alleles for a particular trait carried by an individual.
QUESTION 4 The following information includes: » akey that is used to classify the types of alpine and subalpine grassland habitats « atable of abiotic and biotic data obtained from a habitat survey. Alpine and subalpine grasslands Habitat classification Moss-and-lichen- Yes — dominated mountain summit Alpine and subalpine Yes —> nutrient-enriched grassland Calcareous alpine and Basic — subalpine grassland Acidie — Adcidicalpine and subalpine grassland Abiotic physical parameter Reading Reference range for nutrient-poor soil (mg/kg) Nitrates/nitrites (mg/kg) Ammonia (mg/kg) Total phosphorous Biotic description: Small amount of low-lying moss growing on soil substrate. Predominantly low-lying grasses. Using the data in the table and the key this alpine and subalpine grassland would be classified as (A) amoss-and-lichen-dominated mountain summit. (B) an alpine and subalpine nutrient-enriched grassland. (C) acalcareous alpine and subalpine grassland. (D) an acidic alpine and subalpine grassland.
QUESTION 5 The figure shows the diversity of marine animals since the late Precambrian time. The data is from marine animal families that have been reliably preserved in the fossil record. 19OOT families 900 living 800 today 700 600 500 400 300 200 100 Number of marine families o Triassic - Jurassic Cretaceous Paleogene Neogene Ordovician Silurian Devonian Carboniferous Precambrian Cambrian p— S ) S 600 200 W S O N S S Millions of years ago Which of the following time periods saw the greatest evolutionary radiation of the marine families? (A) Ordovician (B) Cretaceous (C) Devonian (D) Permian
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