UNIT 3 EXAM STUDY GUIDE BIODIVERSITY 2026 UPDATED EXAM QUESTIONS & ANSWERS WITH DETAILED RATIONALES | INSTANT PDF DOWNLOAD

UNIT 3 EXAM STUDY GUIDE BIODIVERSITY 2026
UPDATED EXAM QUESTIONS & ANSWERS WITH
DETAILED RATIONALES | INSTANT PDF DOWNLOAD
Cardiac tissue develops from:

a. Endoderm

b. Mesoderm

c. Ectoderm

d. Dermis - correct answer -b. Mesoderm



2. Which vascular tissue of the plant transports organic molecules?

a. Xylem

b. Cork

c. Phloem

d. Root - correct answer -c. Phloem



3. Which of the following are TRUE regarding Phylum Ctenophora?

a. They lack true tissues

b. They exhibit radial symmetry

c. They exhibit bilateral symmetry

d. They have a complete digestive tract - correct answer -b. They exhibit radial symmetry



4. Animals that have a body cavity partially lined by mesoderm are classified as:

a. Acoelomates

b. Coelomates

c. Vertebrates

, d. Pseudocoelomates - correct answer -d. Pseudocoelomates



5. True or False: Sieve-tube members DO NOT require companion cells to remain alive. - correct
answer -False



6. What is the early stage of development where the embryo is a hollow ball of cells?

a. Morula

b. Blastopore

c. Blastula

d. Zygote - correct answer -c. Blastula



7. What type of cleavage do protostomes exhibit?

a. Radial

b. Spiral

c. Circular

d. Symmetrical - correct answer -b. Spiral



8. True or False: All plants undergo secondary growth? - correct answer -False



9. What part of the plant regulates gas exchange?

a. Plasmodesmata

b. Stele

c. Casparian strips

d. Stomata - correct answer -d. Stomata



10. What cells surround the stomata?