midterm1-07 answers

midterm1-07 answers - Name _ Biology 1001 Introductory...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Name _______________________________________ 1 Biology 1001 Introductory Biology Midterm 1 October 3, 2007 Instructions/Rules/etc. 1. This exam has 9 pages (including this one). Be sure you have them all. 2. The exam will last 50.69223 minutes. 3. The only permissible aid is a calculator. 4. Put your name on every page.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Name _______________________________________ 2 A - Multiple Choice. Circle the most appropriate answer to each question (25 marks) 1) According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate? A) from infoldings of the plasma membrane, coupled with mutations of genes for oxygen- using metabolism B) from engulfed, originally free-living prokaryotes C) by tertiary endosymbiosis D) from the nuclear envelope folding outward and forming mitochondrial membranes E) when a protoeukaryote engaged in a symbiotic relationship with a protobiont 2) A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 36% of the animals display a recessive trait ( aa ). What proportion of the population is probably heterozygous (Aa) for this trait? A) 0.18 B) 0.36 C) 0.48 D) 0.60 E) 0.72 3) What is the primary role of a mushroom's underground mycelium? A) absorbing nutrients B) anchoring C) sexual reproduction D) asexual reproduction E) protection 4) Organisms that are neither coelomate nor pseudocoelomate should, apart from their digestive systems, have bodies that A) are solid with tissue. B) lack the ability to metabolize food. C) are incapable of muscular contraction. D) lack true tissues. E) lack mesodermally derived tissues. 5) What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water? A) amoebocytes B) choanocytes C) mesohyl cells D) pore cells (porocytes) E) epidermal cells
Background image of page 2
Name _______________________________________ 3 6) What is the probable sequence in which the following groups of animals originated, from earliest to most recent? 1.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

midterm1-07 answers - Name _ Biology 1001 Introductory...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online