In the evolution of plants, wood appeared before seeds.
Answer the following statement true (T) or false (F)
True
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The compound eyes of insects are very good at ________ but are less effective at ________
a. seeing in the dark / detecting movement b. generating clear images / depth perception c. detecting movement / generating clear images d. depth perception / seeing in the dark
What is the difference between 'heartwood' and 'sapwood'?
(a) Sapwood is the older part of the xylem (b) In contrast to sapwood, heartwood has lost its ability to transport water and minerals (c) Heartwood contains parts of the phloem which explains its different color (d) Heartwood and sapwood are both needed to transport organic material to the root
An enzyme is also known as
A. an inorganic protein. B. an organic catalyst. C. a metal ion. D. an inhibitor.
The genetic recombination of ________ caused massive, widespread epidemics that affected the global human population several times in the twentieth century
A) human and bacterial plasmids B) HIV and flu viruses C) bacterial and viral plasmids D) bird flu viruses and human flu viruses