Answer:
The special cells of the sponge include those that filter sea water; cells that are phagocytic (that engulf and digest food particles); those that form the external 'skin', breathing pores and tubes through which water enters and leaves the body; and those that secrete the mineral and organic skeletons, called spicules and fibres, respectively. Sponges are also unique because nearly all their cells can change function as required (totipotency).
Explanation:
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The answer is (B) Edward's Syndrome, Down Syndrome, Klinefelter's Syndrome.
These syndromes are caused when there is an extra copy of chromosomes present in the cells.
In Edward's syndrome, there is an extra copy of the chromosome 18.
In Down's syndrome, there is an extra copy of chromosome 21.
In Klinefelter's syndrome, there is an extra copy of X chromosome.
Answer:
agriculture can cause problems such as less housing, cut down of trees to make way for more agricultural things and the animals causes more droughts. But it helps give people food
Explanation:
Because the area on Earth that's inside the tip of the moon's shadow is
usually only a couple of hundred miles wide at most, and it's moving along
the Earth's surface at thousands of miles an hour, and only the people who
happen to be inside that little area see the total solar eclipse.
Over a substantial period of time, the numbers of solar and lunar eclipses
are equal. For example, during the 100 years of the 20th Century, there
were 128 solar eclipses, and 129 lunar ones.
The difference is that during a lunar eclipse, everybody on the night side of
Earth can see it, but during a solar one, you have to be in just the right place
on the day side.
Another way to look at it:
A lunar eclipse happens on the Moon, and anybody who can see the Moon
can see the eclipse. But a solar eclipse happens on the Earth, and in order
to see it, you have to be where the eclipse is.
Answer:
The scientist must complete the experiment, evaluate the results and disclose his conclusions.
Explanation:
If the scientist wishes to find conflicting data in a widely accepted theory, he must first establish a scientific experiment using all the steps of the scientific method. It is important for the scientist to complete the entire experiment so that he can evaluate the results and reach concrete conclusions about whether there is, in fact, conflicting data in the theory. The results should generate conclusions that must be disclosed regardless of whether the cinetist's hypotheses are proven or not.
The scientific method is a set of rules that guide the execution of a scientific experiment.
