Answer:
D
Explanation:
How worn out and weatherd the rocks are inside and outside the rock!
So far scientists have not found a way to determine the exact age of the Earth directly from Earth rocks because Earth's oldest rocks have been recycled and destroyed by the process of plate tectonics. If there are any of Earth's primordial rocks left in their original state, they have not yet been found. Nevertheless, scientists have been able to determine the probable age of the Solar System and to calculate an age for the Earth by assuming that the Earth and the rest of the solid bodies in the Solar System formed at the same time and are, therefore, of the same age. The ages of Earth and Moon rocks and of meteorites are measured by the decay of long-lived radioactive isotopes of elements that occur naturally in rocks and minerals and that decay with half lives of 700 million to more than 100 billion years to stable isotopes of other elements. These dating techniques, which are firmly grounded in physics and are known collectively as radiometric dating, are used to measure the last time that the rock being dated was either melted or disturbed sufficiently to re homogenize its radioactive elements.
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b. Susan is right, James is the father
c. Susan is not the real mother of the child and an error was made in the nursery
d. It is impossible to make a decision based on the limited data available
Answer: The means for transmission of disease-causing microorganism is provided by the direct or indirect contact.
Microorganisms can cause disease only once they are transferred to the body. The disease causing microorganisms are termed as pathogens which are transmitted by several ways such as from skin to skin, by nuclei droplets, through blood and body fluids or via air. In vector transmissions the disease is carried by the parasitic insects via animals, air borne transmission occurs when microorganisms move through air or the dust particles, droplet transmission occurs by coughing, sneezing or talking by the person who is infected while indirect transmission occurs by physical contact or by touching contaminated objects.
B. satire
C. propaganda
D. jargon
E. personification
C. propaganda.................
-mouth
-stomach
-esophagus
-pharynx
-small intestine
Answer: The correct answer is Mouth, Pharynx, Esophagus, Stomach, and Small intestine.
Alimentary canal is also known as digestive tract. It represents a pathway through which food is first taken in, then allowed to digest and finally the undigested food in released through anus.
From the given options, the structures included in the alimentary canal are (in the order)- Mouth- Pharynx- Esophagus- Stomach- Small intestine.
Mouth is the structure that ingests the food. Digestion begins in the mouth itself. It starts the digestion of carbohydrates through salivary amylase enzyme.
Pharynx is a muscular flap that aids the movement of food in the esophgus, which helps in the swallowing through peristaltic movements.
Stomach lies after esophagus. Protein digestion takes place in stomach.
Small intestine is a coiled tubular structure where complete digestion of food takes place. It is also the site of absorption of nutrients.
B. It fluctuates slightly above and below the optimum level as birds are born and die.
C. It increases rapidly as birds migrate south for the winter.
D. It stays constant since carrying capacity is a fixed value that does not change.
Answer:
The correct option would be A. It drops quickly to zero once the temperature goes below freezing.
Carrying capacity is defined as the number of organisms (animals, plants, crops, or birds) a region can support without getting degraded.
The temperature in the northern New York forest can drop below freezing during winters. Due to this, insects either migrate the place or spend winters as eggs, larvae, nymphs, or pupae.
It resulted in the unavailability of insects or food for insectivorous birds due to which carrying capacity of a region quickly drops to zero.
B.autonomic
C.sympathetic
D.parasympathetic
Answer:
The correct answer would be A. somatic nervous system.
A somatic nervous system is sub-set of the peripheral nervous system which controls the voluntary actions and body movements with the help of skeletal muscles.
This system mainly consists of two types of nerves:
Afferent nerves: Theses are sensory nerves which carry stimulus or information from receptors to the central nervous system (brain and spinal cord).
Efferent nerves: These are also termed as motor nerves which carry commands or responsive information from the central nervous system to the muscles.
The muscles contract and produce movements.