The type of plant cell that provides rigid support and is dead at maturity is a cell.
A. sieve tube
B. guard
C. parenchyma
D. sclerenchyma
E. collenchyma
D. sclerenchyma
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An initiator tRNA is loaded onto a small ribosomal subunit, which locates the start codon. What happens immediately following this event?
1.A new tRNA moves into the P site and the previous amino acid is transferred from its tRNA to the amino acid the new tRNA is carrying.
2.The anticodon of the initiator tRNA matches up with the mRNA start codon.
3.The new polypeptide chain is released from the ribosome.
4.The large ribosomal subunit joins to the small ribosomal subunit.
The real goal of hypothesis testing is to
A) eliminate incorrect ideas. B) form a theory. C) fully explain observations. D) understand why science never changes.
A population's age structure tracks ____
a. the average age of the members of the population b. how long the population has existed in the area c. the rate at which the population is aging d. the relative numbers of each age e. death rate
A belt of coniferous forest, known as ________ forest, occurs in the high latitudes of the Northern Hemisphere
Fill in the blank(s) with correct word