Answer:
C) first appearance of most invertebrates.
Explanation:
The Cambrian Explosion occurred 542 mya. The earliest complex animals arose in the sea at the beginning of the Cambrian Explosion. It would take another half a billion years for mammals to rise. Multicellular life dates back 1.2 bya, but more cpomplex life, such as animals, did not occur until the Cambrian Explosion. In the beginning of the Cambrian Explosion, many soft-bodied animals, such as jellyfish and sea anemones appeared.
Answer:
C
Explanation:
First appearance of most invertebrates
When he discovered that blood is pumped from the heart to the body, and back to the heart, William Harvey had a difficult time getting people to accept his discovery because it went against the ancient teachings of Galen.
blood is a fluid connective tissue contain blood cells and an plasma.
The major functions include transportation and providing immunity and protection.
The major components include plasma primary constituent of blood contain 55 percent of blood volume. It is made up of water, salts, proteins, and blood cells.
Red Blood Cells which determine blood type, biconcave in shape, enucleated contain millions of hemoglobin molecules.
White Blood Cells act as defensive cell in the immune system and lymphatic system against infection.
Platelets are formed from pieces of cells present in the bone marrow called megakaryocytes.
Learn more about Blood, here:
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Answer:
1 - William Harvey
2 - Galen
Explanation:
Galen, who postulated that blood was produced continuously in the liver and absorbed by the body (not recirculated), served as the Roman emperor's personal physician. For 1500 years, his theories about human anatomy went unquestioned until Harvey's proposal in 1628.
15 percent
25 percent
50 percent
On Edginuity it is NOT 25!!!!
Answer:
A higher frequency causes a shorter wavelength and higher energy.
A shorter frequency causes a greater wavelength and low energy.
Explanation:
Frequency is the number of waves that move at a period of time. It is measured by counting the number of crest point.
Wavelength is the distance between waves. A wave with higher frequency have crest that a very close and therefore the distance between them or wavelength is short compare to a wave with low frequency that the distance are farther apart and they have long wavelength. Therefore to generate high frequency of wave , more energy is required to do this .
Answer:
Water pollution
Explanation:
Answer:
This question lacks options; the options are:
A) Crickets are inactive in October.
B) Do crickets like warm weather better than cold weather?
C) Crickets chirp more frequently as temperature increases.
D) Crickets chirp for many reasons, and temperature is probably one reason.
The answer is C
Explanation:
A hypothesis is a testable explanation given to an observed problem. The hypothesis aims at solving or answering a particular question or observation. A hypothesis, which is subject to testing via experimentation, explains how the independent variable affects the dependent variable.
According to this question, Will notices that crickets seem to chirp more frequently at night in June than they do in October. He then asks a scientific question based on this observation that goes thus: how do temperature changes affect how often crickets chirp?
The best hypothesis that explains this scientific question is "Crickets chirp more frequently as temperature increases" because it gives a predictive statement about how a change in temperature (independent variable) affects chirping in crickets (dependent variable).