Answer:
D
Explanation:
Answer:
C. Accidents
Explanation:
The latest UN surveys show that traffic accidents are the leading cause of death among 15- and 29-year-olds in the United States. According to official data, more than 1.2 million people lose their lives in traffic accidents every year. The numbers are frightening and show that the problem of traffic negligence is still very much highlighted. Young people are among the hardest hit because of the lifestyle to which they are generally associated. Drunk driving and speeding are the main causes of accidents among young people. However, driving and using your mobile phone to send instant messages begins to appear as a major trigger for accidents.
Answer:
atomic number
Explanation:
The number of protons in an atom determines its atomic number, which is a defining trait of an element. In a neutral atom, the same number of protons also equals the number of electrons. However, the mass number or atomic mass is the total number of protons and neutrons.
The number of protons in the nucleus of an atom determines its atomic number. This is a defining trait of an element and determines its identity. For instance, any atom with six protons is the element carbon, which has an atomic number of 6 - this applies irrespective of the number of neutrons or electrons present.
Moreover, in a neutral atom, there must be an equal number of positive and negative charges implying that the number of protons is equal to the number of electrons. Thus, the atomic number indicates not only the number of protons but also the number of electrons in an atom.
The atomic mass or mass number of an atom, on the other hand, is the total number of protons and neutrons in an atom. Therefore, you can derive the number of neutrons by finding the difference between the mass number and the atomic number: (A - Z = number of neutrons).
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b) Potassium (K+) concentration is higher outside the cell, and sodium (Na+) concentration is higher inside the cell.
c) Potassium (K+) and sodium (Na+) gradients are maintained by active transport in a resting mammalian neuron.
d) Neurons are the only cells that have a charge difference across their membranes.
Answer:C
Explanation:
Resting Membrane Potential (RMP) is the charge difference represented as voltage difference across a nueronal cell membrane at rest.
It has a value of -50 and -75mV.
Graphically it represents the flat plateau at the last part of the curve of action potential (check the attachments)
In a normal resting cell after Action potential ;for example nuerone,the intercellular layer has more potassium ions, while the extracellular layer has more Sodium ions .
These ions have special channels called sodium and potassium channels for movement in and out of these ions by active transports.
The movements of these ions across the membranes generated electrical potential difference for action potential.
sugarcane
B.
sunlight
C.
corn
D.
oil or petroleum
b. partly moveable joints.
c. movable joints.
d. none of the above
Answer:
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Explanation:
species, in biology, classification comprising related organisms that share common characteristics and are capable of interbreeding. This biological species concept is widely used in biology and related fields of study.
Answer:
Groups
Explanation: