What are 3 key differences between bacteria and eukaryotic cells
What will be an ideal response?
Ans:
1. Eukaryotic cells have true nucleus; bacteria have DNA in cytoplasm but no nucleus
2. Eukaryotic cells have no peptidoglycan (PG) cell wall; Bacteria has a peptidoglycan cell wall
3. Eukaryotic cells have organelles; bacteria cells do not have organelles
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Which observations illustrate shared ancestry by anatomical comparison studies? Check all that apply.
_____ The same structure has evolved to carry out different functions. _____ Different structures evolve in similar ways when subjected to the same selective pressures. _____ A structure becomes vestigial. _____ Structures are found to be homologous.
Microbial ________ are scientists who investigate the synthesis of antibiotics and toxins, the production of energy with microorganisms, and the ways in which microorganisms survive harsh environmental conditions.
Fill in the blank(s) with the appropriate word(s).
The bones that make up the digits of the hands or feet are known as the ________
A) phalanges B) carpals C) tarsals D) metatarsals
Suppose you've regressed profits across stores (i) in Indiana and Michigan over two years (t) on an Indiana dummy variable as well as on an interaction between an Indiana dummy variable and Year 2 dummy variable. Thus, your regression equation is: Profitsit = ?0 + ?1Indianait + ?2Year2it Indianait + Ui. What is the marginal effect of a store being in Indiana based off this regression equation?
A. ?1 + ?2 × Year2it B. ?0 + ?1 C. ?2 D. ?0 + ?1 + ?2