Normally, children cannot easily make understandable sentences until they are ________

A) 8 months old
B) 12 months old
C) 24 months old
D) 36 months old


D

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1) Crossing-over occurs in meiosis I and meiosis II. 2) Chromosome duplication occurs between meiosis I and meiosis II. 3) In animal cells, cell division is accomplished by the formation of a cleavage furrow. 4) Daughter cells produced in meiosis are identical. 5) Chromosome duplication occurs prior to both mitosis and meiosis.

Biology & Microbiology

Action potentials ____

a. move backwards b. are examples of negative feedback c. are generated and completed in a matter of milliseconds d. are only generated regardless of whether or not the threshold potential is reached e. are all the same size

Biology & Microbiology

Which of the following characteristics of the structure of DNA was determined directly from X-ray diffraction photographs of crystallized DNA?

A. the double helical structure B. the length of a given DNA molecule C. the frequency of A versus T nucleotides D. the sequence of nucleotides

Biology & Microbiology

Which of the following contain enzymes used in the breakdown of glucose and generation of ATP?

a. Endoplasmic reticula b. Mitochondria c. Golgi bodies d. Lysosomes e. Ribosomes

Biology & Microbiology