Homo habilis is considered to be the first of our human ancestors to make tools
Indicate whether the statement is true or false
TRUE
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Plants are more readily manipulated by genetic engineering than are animals because _____
A) plant genes do not contain introns B) more vectors are available for transferring recombinant DNA into plant cells C) a somatic plant cell can often give rise to a complete plant D) genes can be inserted into plant cells by microinjection E) plant cells have larger nuclei
People with Turner syndrome have ________ chromosome constitution.
A) XX B) XXY C) XO D) XXX
Four of the five answers listed below possess a complete digestive system. Select the exception.
a. human b. bird c. earthworm d. planaria
Which is one of the seven characteristics that Mendel observed in pea plants? Which is one of the seven characteristics that Mendel observed in pea plants?
A. flower size B. seed texture C. leaf shape D. stem color