To observe mitosis in onions, you choose to look at the root tip. This is because the root tip is the
A. vascular tissue.
B. pericycle.
C. dermal tissue.
D. endodermis.
E. apical meristem.
E. apical meristem.
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Chemolithotrophs that obtain electrons from donors such as sulfide use the same electron transport chains to obtain energy as chemoorganotrophs
Indicate whether the statement is true or false.
Which of the following statements is not true of the formation of N-formylmethionyl-tRNAfMet?
A. It is formed in two successive reactions. B. A formyl group is transferred to methionine before it is added to tRNAfMet. C. The transformylase enzyme most likely recognizes a unique structural feature of tRNAfMet. D. The tRNAfMet is charged by the Met-tRNA synthetase.
Answer the following statements true (T) or false (F)
1. For the traits Mendel studied in pea plants, each trait, or phenotype, is expressed in only the dominant or recessive form, depending on the genotype. 2. In the ABO blood type system, there are six possible genotypes, but only two possible phenotypes. 3. Environmental conditions affect single-gene traits rarely, but affect polygenic traits often. 4. When the frequencies of all the phenotypes associated with a polygenic trait are plotted on a graph, they form a characteristic bell-shaped curve. 5. Gregor Mendel is sometimes referred to as the "father of genetics" because he influenced the science of genetics more than anyone else.
Suppose a mutagen is used on an inbred population of mice to establish cell lines, each including a different mutant allele, which can then be tested for function. This technique is known as ________
Fill in the blank(s) with correct word