The defining trait of hominins is

a. large brain.
b. shoulder that can rotate 360 degrees.
c. bipedalism.
d. extended care of young.
e. nails on fingers and toes


C

Biology & Microbiology

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It is difficult to pinpoint when the first terrestrial plants appeared because early plants lacked spores

Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following is true?

A. Only eukaryotes have a membrane-bound nucleus B. Only eukaryotes have ribosomes C. Only bacteria have cell walls D. Only bacteria and eukaryotes have a plasma membrane

Biology & Microbiology

A genus of primarily wind-pollinated plants includes one unusual species that has evolved to be pollinated by insects. Several morphological changes have accompanied this adaptation. The ________ are more colorful, there is a nectary at the base of the ________, the ________ are shorter and produce sticky pollen, and the ________ are stickier for enhanced pollen capture.

A. stamens, carpels, petals, sepals B. petals, sepals, carpels, stamens C. petals, sepals, stamens, carpels D. petals, stamens, sepals, carpels

Biology & Microbiology

Any scientific information that appears in a written format is considered a primary source.

a. true b. false

Biology & Microbiology