What would slow the death rate of microbes
What will be an ideal response?
treatment with a chemical at cold temperature
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Answer the question using the accompanying figure. In the internal leaf structure, the structure labeled "1" is ____
a. a vascular bundle b. spongy mesophyll c. epidermis d. a stoma e. palisade mesophyll
Which of the following statements about mitochondria is true?
a. all protists have mitochondria b. some protists are descended from early eukaryotes that never had mitochondria c. all living protists are descended from a common ancestor that had mitochondria d. some protists lost their mitochondria as an adaptation to a predatory lifestyle e. some protists lost their mitochondria as they became photosynthetic
Which of the following organisms is (are)
easily modified by genetic engineering?
a. bacteria and yeasts b. bacteria and mice c. yeasts and mice d. molds and mice e. humans
A karyotype
a. compares one set of chromosomes to another. b. is a visual display of chromosomes arranged according to size. c. is a photograph of cells undergoing mitosis during anaphase. d. of a normal human cell shows 48 chromosomes. e. cannot be used to identify individual chromosomes beyond the fact that two chromosomes are homologues.