Biology 1108 Exam 3 2025/2026 Exam Questions and Verified Answers | Already Graded A+

Biology 1108 Exam 3 2025/2026 Exam
Questions and Verified Answers |
Already Graded A+



When two species compete for similar resources, resource partitioning can

alter the niche of the species that compete. The figure shows an example

of this.

Resource partitioning results in:




A. individuals of each species sharing the resources that they both exploit.

B.individuals of each species hybridizing in the region of overlap.

C.a move from the fundamental niche to the realized niche for both

species.

D.a move from the realized niche to the fundamental niche for both

species. - 🧠 ANSWER ✔✔C.a move from the fundamental niche to the

realized niche for both species.




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,Cnidaria - 🧠 ANSWER ✔✔Phylum chartacterized by radial symmetry, 2

germ tissues in the embryo; a closed internal gastric cavity, and well-

developed tissues but not organs; includes jellyfish, esea anemones, and

corals


Bilateria - 🧠 ANSWER ✔✔Monophyletic group of animals with bilateral

symmetry


Protostomes - 🧠 ANSWER ✔✔Bilaterian in whcih the blastopore first

opening to internal cavity of developing embryo becomes mouth


Deuterostomes - 🧠 ANSWER ✔✔Bilaterian in which the blastopore, the first

opening to the internal cavity of the developing embryo, becomes the anus

Humans and chordates


Choanocytes - 🧠 ANSWER ✔✔Type of cell that lines the interior surface of

a sponge;have flagella and function in nutrition and gas exchange


Mesohyl - 🧠 ANSWER ✔✔Gelatinous mass lies between interior and

exterior cell layers of sponge that contains some amoeba-like cells that

function in skeleton formation and dispersal of nutrients




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,Eumetazoa - 🧠 ANSWER ✔✔Monophyletic group of all animals other than

sponges


Gastric Cavity - 🧠 ANSWER ✔✔Cindarians, closed internal site where

extracellular digestion and excretion take place


Epidermis - 🧠 ANSWER ✔✔Mammals, outer layer of skin, which serves as

a water-resistant, protective barrier.

Plants, outermost layer of cells in leaves, young stems (lacking secondary

growth), and roots. Outer layer of cnidarian body.


Endodermis - 🧠 ANSWER ✔✔In plants, layer of cells surrounding the xylem

and phloem at the center of the root that controls movement of nutrients

into xylem

Inner lining of cnidarian body


Mesoglea - 🧠 ANSWER ✔✔In cnidareans, gelatinous mass enclosed by

epidermis and endodermis


Placozoans - 🧠 ANSWER ✔✔Possibly simplest of all animals; each

contains only few thousand cells arranged into upper and lower epithelia




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, that sandwwich an interior fluid crisscrossed by network of multinucleate

fiber cells


Annelid Worms - 🧠 ANSWER ✔✔Phylum of worms have a cylindrical body

with distinct segments and a bilaterian body plan


Mollusks - 🧠 ANSWER ✔✔Monophyletic group distinguished by a mantle

which plays a major role in movement skeleton-building, breathing, and

excretion; includes clams, snails, and squid


Gastropods - 🧠 ANSWER ✔✔Mollusks


-->Snails

-->Slugs


Cephaloppods - 🧠 ANSWER ✔✔Monophyletic group of mollusks


-->Squid

-->Cuttlefish

-->Octopus

-->Chambered nautilus

Distinctive adaptations-->well-developed eyes and muscular tentacles that

capture prey and sense the environment

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