bio 1 lesson books definitions Flashcards by Olivia Bellantoni | Brainscape

Q

what is turner’s syndrome caused by

A

monosomy XO

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Q

what is klinefelter syndrome caused by

A

trisomy XXY

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Q

what is down syndrome caused by

A

trisomy 21

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Q

what is in the upper epidermis of a leaf

A

the cuticle

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Q

what does the cuticle do

A

protects the leaf, especially from drying out

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Q

what is in the mesophyll of a leaf

A

chloroplasts, thylakoids, and stroma

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Q

what is in the lower epidermis of a leaf

A

stomata and guard cells

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Q

what do stomata do

A

pores that allow gas exchange

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Q

what are guard cells

A

regulate gas exchange to prevent dessication

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Q

what are the veins of leaves

A

xylem and phloem

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Q

what occurs in xylem

A

upward transport of water

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Q

what occurs in phloem

A

downward transport of nutrients

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