Biol 1108 Exam 3 The Sonoran Desert Questions with Correct Answers 2026

Biol 1108 Exam 3: The Sonoran Desert
Questions with Correct Answers 2025
Sonoran n j Desert n j - n j CORRECT n j ANSWER n j -Located n j in n j the n j SW n j US n j and n j NW n j Mexico

Summer: n j Scarce n j precipitation n j and n j high n j temperatures n j make n j Summers n j unsuitable n j for
n j plant n j gr njowth



Spring: n j too n j dry n j for n j plant n j growth

Winter: n j best n j season n j for n j plant n j growth n j (especially n j annuals), n j but n j precipitation n j is
n j very n j unpredic njtable




Sun n j will n j almost n j never n j be n j a n j limiting n j reactant



Annuals n j - n j CORRECT n j ANSWER n j -
plants n j that n j germinate, n j grow, n j set n j seed n j and n j die n j in n j a n j single n j growing n j season



Cellulose n j - n j CORRECT n j ANSWER n j -molecule n j that n j makes n j up n j most n j of n j a n j plant's n j biomass

-Carbon n j in n j cellulose n j comes n j from n j air



Van n j Helmont's n j Experiment n j - n j CORRECT n j ANSWER n j --
grew n j a n j 5lb n j willow n j tree n j in n j 200lb n j of n j dried n j dirt n j for n j 5 n j years. n j After n j 5 n j years, n j the
n j tree n j weighed n j 1 nj69 n j lb n j but n j the n j soil n j weighed n j the n j same n j amount



-Proves n j plants n j get n j C n j from n j the n j air



Roots n j - n j CORRECT n j ANSWER n j --Plant n j organ n j that n j obtains n j water

-Plant n j allocates n j resources n j here n j when n j dry

-Where n j water n j enters n j plant

, Leaves n j - n j CORRECT n j ANSWER n j --
Plant n j organ n j that n j creates/obtains n j carbon/sugar n j And n j collects n j light

-More n j leaves, n j more n j growth n j potential n j and n j faster n j growth, n j but n j more n j transpiration

-Where n j water n j exits n j plants n j through n j stomata



Stem n j - n j CORRECT n j ANSWER n j -
plant n j allocates n j resources n j here n j short n j term n j to n j compete n j with n j surrounding n j plants



Xylem n j - n j CORRECT n j ANSWER n j -
vascular n j tissue n j of n j plants n j that n j carries n j ONLY n j water n j through n j hollow/dead n j cells n j from
n j roots n j to n j le njaves n j (one n j direction) n j using n j cohesion, n j adhesion, n j and n j negative


n j pressure




Phloem n j - n j CORRECT n j ANSWER n j -
vascular n j tissue n j of n j plants n j that n j carries n j dissolved n j nutrient, n j hormones, n j sugars, n j etc.,
n j around n j a n j pl njant n j in n j any n j direction n j using n j osmosis




Stomata n j - n j CORRECT n j ANSWER n j --
gaps n j that n j open n j and n j close n j that n j allow n j gases n j to n j enter n j and n j exit n j the n j leaves

-Primary n j function n j : n j gas n j exchange n j (constant n j exchange n j is n j ideal)

-Allow n j oxygen n j (and n j unfortunately n j water) n j to n j escape

-Allow n j CO2 n j to n j enter n j from n j the n j atmosphere

-Tradeoff: n j water n j loss n j for n j gas n j exchange



Guard n j Cells n j - n j CORRECT n j ANSWER n j --cells n j that n j surround n j stomata

-Kidney-shaped

-Stomata n j Open n j - n j guard n j cells n j turgid, n j abundant n j water

-Stomata n j Closed n j - n j guard n j cells n j flaccid, n j scarce n j water

-Can n j also n j force n j stomata n j to n j open n j using n j hormones n j and n j ion n j flow