Which of the following questions can NOT be answered using the scientific method?
A. What was the first living organism on Earth?
B. Does a particular gene influence aging in mice?
C. How does migration affect the reproductive success of monarch butterflies?
D. How does coastal development affect wetland biodiversity?
Ans: A. What was the first living organism on Earth?
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Which type of plant tissue is responsible for the transport of sugars, proteins, and solutes throughout the plant?
a. xylem b. phloem c. cuticles d. stomata
The populations of keystone predators are controlled by the populations of their prey species
Indicate whether the statement is true or false
Which of the following transgenic techniques requires ES cells to be collected from the inner blastocyst?
A) Embryonic stem cell method B) Retrovirus-mediated method C) Pronuclear injection method D) Sperm-mediated transfer method E) Plasma cell membrane fusion method
As a general, common feature, what characteristic do flatworms (Platyhelminthes) have in common with some of the more advanced animal phyla?
A) a shell B) complex sensory organs C) bilateral symmetry D) a coelom E) segmentation