The relatively simple excretory system used by flatworms consists of tubules called
a. nephrons.
b. hepatic tubules.
c. metanephridia.
d. Malpighian tubules.
e. protonephridia.
E
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You have been asked to synthesize a new isotope for cadmium. Which part of the original atom would you need to manipulate in order to create an isotope?
A. Neutrons. B. Protons. C. Protons and neutrons. D. Electrons.
Contraction of _____ drives the flow of blood through the aorta and pulmonary arteries
a. atria b. ventricles
A homozygous plant has sepals of 30-cm flowers while another homozygote of the same species has 40-cm flowers. The F1 flowers are all 35 cm
In the F2, out of 600 plants the smallest flowers were 30 cm and the largest were 40cm; all the others were of intermediate sizes. If all the genes involved in flower size are additive, how many gene pairs are there?
A visual display of metaphase chromosomes arranged by size, shape, and banding pattern is ______.
a. a centrosome b. a genetic disorder c. amniocentesis d. a karyotype