The three phylogenetic trees above all contain the same members, all have a common ancestor, but are divided up in three different ways. Which tree has members circled that are of several evolutionary lines and does not include the most recent common ancestor of the included lineages? What is this type of group is this?
A. Tree 3; polyphyletic.
B. Tree 2; polyphyletic.
C. Tree 1; monophyletic.
D. Tree 3; monophyletic.
E. Tree 2; paraphyletic.
A. Tree 3; polyphyletic.
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Radioisotopes
a. are unstable and emit energy and particles to stabilize themselves. b. are different elements from the "standard" elements. c. are very stable and do not change over time. d. contain more electrons than the "standard" element. e. contain less electrons than the "standard" element.
Pain caused by a heart attack in men is often felt in the left shoulder and left arm. This phenomenon is known as ________ pain
Fill in the blank(s) with correct word
The stalk of a leaf is called the ________.
Fill in the blank(s) with the appropriate word(s).
When a lion competes with a zebra for water, it is an example of interspecific competition.
Answer the following statement true (T) or false (F)