A piece of petrified wood was once part of a living organism that has had its tissues replaced by minerals. Which property of life will still be present in the wood?

a) response to stimuli
b) organization
c) growth and reproduction
d) metabolism
e) homeostasis


Ans: b) organization

Biology & Microbiology

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Which of the following elements is considered an essential macronutrient for plants?

a. oxygen b. boron c. lithium d. silicon e. molybdenum

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An enzyme is thought to optimize the fit

between substrates by restraining and stretching or squeezing them into certain shapes and moving them to the transition state as described by the ____ model of enzyme activity. a. lock and key b. induced-fit c. template d. activation e. conformational

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What is necessary in order for organisms to change over generations?

What will be an ideal response?

Biology & Microbiology

Which essential plant nutrient regulates the opening and closing of pores in the leaves?

A) Copper B) Calcium C) Potassium D) Phosphorus E) Iron

Biology & Microbiology