The most closely related animal to vertebrates are the:a
Hemichordata.
b. Hemichordates.
c. Cephalochordata.
d. Ophiuroidea.
e. Urochordates.
e
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While strolling through an arboretum, a very tall tree bearing relatively small pollen-producing cones and short, needle-like leaves catches your eye. What else is also likely true of this species?
_____ It produces resin. _____ It is pollinated by moths. _____ It is a monocot. _____ Its water-conducting cells are protected from desiccation by tori. ______ Its leaf surfaces are protected from desiccation by a thick waxy cuticle.
We know that carbon dioxide levels were in the atmosphere millions of years ago through ____
a. radioisotope dating b. measuring carbon dioxide levels in fossil fuel samples c. measuring carbon isotope ratios in fossil fuel samples d. measuring carbon dioxide levels in air pockets in ice cores e. measuring carbon isotope ratios in air pockets in ice cores
Which organelle stores most of the DNA in plant and animal cells?
A) Golgi complex B) mitochondrion C) chloroplast D) nucleus E) lysosome
Which of the following has both endocrine and nonendocrine functions?
A) pancreas B) salivary gland C) anterior pituitary gland D) skeletal muscle