Which of the following organisms does NOT have pseudopodia?
a. amoeba
b. euglenid
c. radiolarian
d. foraminiferan
Answer: B
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The many lamellae in the gills of fish improve respiratory efficiency by ______.
A. changing the diffusion constant B. decreasing the distance for diffusion C. increasing the surface area for diffusion D. increasing the concentration difference
What is the order of anatomical structures through which a sperm cell passes during maturation and expulsion from
the body? 1. vas deferens 2. epididymus 3. urethra
a. 1-2-3 b. 1-3-2 c. 2-3-1 d. 2-1-3 e. 3-1-2
Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen lacks tissues and organs and has no head, body symmetry, body cavity, or segmentation. To what phylum does this animal belong?
A) Cnidaria B) Mollusca C) Annelida D) Platyhelminthes E) Porifera
Which of these is NOT a direct factor that controls biotic potential?
A. The age at which reproduction generally begins B. The resources available for each individual C. Reproductive rate D. Predators and pathogens E. Genetic mutations