Ques: Answer the following question given this paragraph: Early in the development of a human fetus, the skeleton is made entirely of cartilage. The relatively soft cartilage gradually changes to hard bone through ossification. This is a process in which mineral deposits replace cartilage in bone. At birth, several areas of cartilage remain, including the ends of the long bones in the arms and legs. This allows these bones to keep growing in length during childhood. Q: Early in the development of a human fetus, the skeleton is made entirely of what? Choices: - bones - anterior - membrane - cartilage A:
Ans: cartilage

Ques: Answer the following question given this paragraph: Inorganic chemical compounds can be broadly classified into two groups: ionic compounds and molecular compounds. The structure of all ionic compounds is an extended three-dimensional array of alternating positive and negative ions. Since ionic compounds do not take the form of individual molecules, they are represented by empirical formulas. Now we will begin to examine the formulas and nomenclature of molecular compounds. Q: Inorganic chemical compounds can be broadly classified into two groups: ionic compounds and which other group? Choices: - cellular compounds - atomic compounds - electromagnetic compounds - molecular compounds A:
Ans: molecular compounds

Ques: Answer the following question given this paragraph: Nerve Impulse Transmission within a Neuron For the nervous system to function, neurons must be able to send and receive signals. These signals are possible because each neuron has a charged cellular membrane (a voltage difference between the inside and the outside), and the charge of this membrane can change in response to neurotransmitter molecules released from other neurons and environmental stimuli. To understand how neurons communicate, one must first understand the basis of the baseline or 'resting' membrane charge. Neuronal Charged Membranes The lipid bilayer membrane that surrounds a neuron is impermeable to charged molecules or ions. To enter or exit the neuron, ions must pass through special proteins called ion channels that span the membrane. Ion channels have different configurations: open, closed, and inactive, as illustrated in Figure 35.9. Some ion channels need to be activated in order to open and allow ions to pass into or out of the cell. These ion channels are sensitive to the environment and can change their shape accordingly. Ion channels that change their structure in response to voltage changes are called voltage-gated ion channels. Voltage-gated ion channels regulate the relative concentrations of different ions inside and outside the cell. The difference in total charge between the inside and outside of the cell is called the membrane potential. Q: For the nervous system to function, neurons must be able to send and receive what? Choices: - pulses - proteins - information - signals A:
Ans: signals

Ques: Answer the following question given this paragraph: The Sun makes up almost all of the mass of the solar system. Q: What celestial body in the solar system makes up most of its total mass? Choices: - Jupiter - earth - Andromeda - sun A:
Ans:
sun