The sex of an individual is determined at the moment of fertilization.
Answer the following statement true (T) or false (F)
True
Sex is determined by the chromosomal make up (XX for females, XY for males) which is determined at the moment of fertilization.
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While hiking in Central Florida, you are lucky enough to see many swallowtail tiger butterflies. You observe that there are two types, or morphs, of the butterflies — a yellow morph and a black morph. What is a likely explanation for this?
A. The swallowtail tiger butterfly has undergone artificial selection. B. The swallowtail tiger butterfly has undergone gene inversion for the gene that determines color. C. The swallowtail tiger butterfly has more than one allele for the gene that determines color. D. The swallowtail tiger butterfly has a single allele for the gene that determines color.
Around 580 million years ago, the first simple animals are seen in the fossil record. These first fossilized animals
a. had a hard protective shell protecting their bodies. b. were photosynthetic. c. were predominantly trilobites. d. were all land animals. e. were probably not related to the modern jellyfish and worms they resembled.
Muscle that is striated and voluntary is ____
a. skeletal only b. smooth only c. cardiac only d. both skeletal and cardiac e. both cardiac and smooth
The famous pink-colored sand of Bermuda's beaches is due to crushed shells of ________, marine organisms with tests (porous shells) made of organic material hardened by calcium carbonate
A) radiolarians B) green algae C) foraminifera D) lobsters