Answer:
Option (D)
Explanation:
From the remains of musical instruments that are collected by the archaeologists, scientists have predicted that the sound was first generated consciously, along with the creation of arts such as wall paintings, clay statuette during the time between 60,000 BC and 30,000 BC.
The human voice was usually considered to be the first musical instrument discovered by humans. In the initial period, people often used their hands to clap so that a clear rhythm can be obtained.
Archaeologists have collected early instruments such as whistles, pipes, and flutes that are made up of wood as well as from the bones of animals. Some of the old instruments include 'Tjurunga' and 'Harp'.
Thus, the human voice was considered to be the first instrument that prehistoric people probably have used.
hence, the correct answer is option (D).
B) cold winters and cool summers.
C) located in the northern hemisphere.
D) a layer of frozen soil called permafrost.
Answer:
The correct answer would be A) many coniferous trees.
Taiga and tundra represent the two coldest biomes of the land on the planet.
The average annual temperature of taiga lies between 41° Fahrenheit and 23° Fahrenheit whereas the temperature of the tundra lies below 23° Fahrenheit throughout the year.
It makes the major difference between the plant life of the two biomes. The taiga is characterized by the presence of coniferous forests which consist of spruces, pines, and larches.
In contrast, vegetation in the tundra is mainly composed of grasses, shrubs, mosses, sedges, and lichens.
A. This is an example of a block design.
B. This is an example of a completely randomized experiment
C. This is an example of a matched pairs experiment.
D. The treatments are diets A and B.
E. The treatment is how much weight a rabbit loses.
F. The experimental units are the 20 rabbits.
G. The experimental units are diets A and B
Answer:
A. This is an example of a block design.
D. The treatments are diets A and B.
F. The experimental units are the 20 rabbits.
Explanation:
The randomized block designs are used in experiment when there is only one variable of prime importance but along with it there are several nuisance factors. As in this case, the prime variable is the impact on weight of rabbits when they consume one the given diets. However, several nuisance factors are unequal weights of the rabbit, different class of rabbits, eating habits of rabbit, time of feeding etc.
Treatment in an experiment is the independent variable that is varied to measure its impact on the subjects of the experiment.
Here these independent variables are diet type A and B and the subject is the group of 20 rabbits. Subjects are also referred as experimental unit i.e on which the experiment is being conducted
Hence, option A, D and F are correct
A. Helium, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call
them, HHNOPS
B. Halogen, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call
them, HHNOPS
C. Gold, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call them,
GHNOPS
D. Carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call
them, CHNOPS
E. Carbon, helium, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call them,
CHNOPS
F. Silver, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call them,
SHNOPS
Answer:
E. Carbon, helium, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call them,
CHNOPS.
or
D. Carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur, or, as some prefer to call
them, CHNOPS
Answer: 1364
Explanation:
Am Gen Students
1 1 4
2 16
3 64
4 256
5 1024
1364 Total
True
A law in science is a generalized precept to describe a body of conclusions in the form of an oral or mathematical description. Scientific laws (also known as natural laws) refer a cause and effect among the observed elements and must perpetually implement supporting the same situations.