Describe how a zygote with trisomy 21 is likely to occur during fertilization

Introductory Chemistry 5
Determine the number of protons and electrons in each ion. (a) \(\mathrm{Al}^{3+}\) (b) \(\mathrm{S}^{2-}\) (c) \(\mathrm{I}^{-}\) (d) \(\mathrm{Ag}^{+}\)

Chemistry 11
The following Lewis structures for (a) HCN, (b) \(\mathrm{C_2H_2}\), (c) \(\mathrm{SnO_2}\), (d) \(\mathrm{BF_3}\) (e) HOF, (f) HCOF. and (g) \(\mathrm{NF_3}\) are incorrect. Explain what is wrong with each one and give a correct structure for the molecule. (Relative positions of atoms are shown corr

Myers' Psychology for AP 2
Which phrase best describes the concept of phonemes? a. Units of meaning in a language b. A form of syntax c. The basis of grammar d. Units of sound in a language e. A form of telegraphic speech

Principles of Microeconomics 7
The market for pizza has the following demand and supply schedules: Price Quantity Demanded Quantity Supplied $4 135 pizzas 26 pizzas 5 104 53 6 81 81 7 68 98 8 53 110 9 39 121 a.Graph the demand and supply curves. What is the equilibrium price and quantity in this market? b.If the actual pri

Anatomy & Physiology 1
Which element is important in directly triggering contraction? a. sodium (Na+ ) b. calcium (Ca++) c. potassium (K+ ) d. chloride (Cl)

Anatomy & Physiology 1
Which is moved the least during muscle contraction? a. the origin b. the insertion c. the ligaments d. the joints

Urban Economics 8
Diesel Cost and Market Areas Consider Figure 23 , which shows the market areas of sugar-beet processing plants. Suppose that an increase in the price of diesel fuel doubles the cost of hauling sugar beets from farms to processing plants. Modify Figure 23 to show the effects of higher transport costs.

Introductory Chemistry: A Foundation 9
Classify the following mixtures as heterogeneous or homogeneous. a. soil b. mayonnaise c. Italian salad dressing d. the wood from which the desk you are studying on is made e. sand at the beach