BIOLOGY HIGH SCHOOL

How often does oxygen cycle through the atmosphere?a. about every 1000 years
b. about every 1500 years
c. about every 2000 years
d. about every 2500 years

Answers

Answer 1
Answer: about every 2000 years.
Answer 2
Answer:

B. about every 2000 years

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A virus is referred to as a particle rather than a cell because structurally it is a A) RNA core in a carbohydrate envelope. B) nucleus surrounded by a protein coat. C) plasmid of DNA surrounded by a capsid. D) RNA or DNA core surrounded by a protein coat.
A population of sixteen emu grew to thirty-nine in one year. After two years, the population had grown to forty-eight. The maximum number of emu that the environment can support is approximately sixty due to limited resources such as food and water. The carrying capacity of the emu population is?
The greenhouse effect is a result ofA. absorption and radiation of energy in the hydrosphere.B. consumption of fruits and vegetables that produce a biofuel.C. consumption and radiation of energy in the atmosphere.D. absorption and radiation of energy in the atmosphere
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Which best describes the author’s viewpoint toward the actual Rosetta Stone in "The Rosetta Stone”?It is a fascinating artifact that can help people better understand the past.
It is a historical artifact that scholars spent too much time trying to understand.
It is something that is interesting to learn about, but it is not historically significant.
It is a piece of 5 that has an exciting and entertaining story.

Answers

The right option is; It is a fascinating artifact that can help people better understand the past.

Rosetta Stone is an ancient Egyptian stone discovered by a Frenchman called Bouchard in August 1799. The stone has inscriptions written in two languages (Egyptian and Greek) and in three writing systems (hieroglyphics, demotic script and the Greek alphabet). The inscriptions on the stone were written by a group of priests in Egypt to honour the Egyptian pharaoh. The inscription contains all the good things that the Egyptian pharaoh did for the priests and the people during his reign.


Answer: A

Explanation:

What are nematocysts?

Answers

It is an explosive cell that is used for protection from predators or prey hunting by the species of the phylum Cnidaria

Which one of the following statements correctly defines active site? a.The active site is a site on the enzyme molecule where specific substrate molecules bind. b.The active site is a site on the substrate molecule where specific enzyme molecules bind. c.The active site is a site on the substrate molecule where specific product molecules bind.

Answers

A) The active site is a site on the enzyme molecule where specific substrate molecules bind .

hopes this helps :)

which structure within a bone contains cartilage cells that divide and increase the size of the bone until adulthood?

Answers

Epiphyseal plate is the structure within a bone that contains cartilage cells that divide and increase the size of the bone until adulthood.

The answer is the Epiphyseal plate.

Hope this helped!! :)

Which deseases can effect the heart specifically

Answers

Coronary heart disease, heart valve disease, congenital heart disease, pericardial disease, Aorta disease, cardiomyopathy, and vascular disease. I'm sure I'm missing some
congestive heart failure is another one

Fatty acids are to Lipids; as? *O Nike is to Jordans
O Students are to teachers
O Scissors are to paper
O Flour, water, milk, sugar and eggs are to making a cake

Answers

the last option, fatty acids are what makes up a lipid, like how flour, water, milk, sugar, and eggs make up a cake
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The major virulence factor produced by C. diphtheriae is diphtheria toxin. The production of diphtheria toxin during infection is controlled by a repressor, DtxR. The activity of DtxR is regulated by iron, which acts as a corepressor. During an infection, the levels of iron available in the tissues for use by C. diphtheriae are low. What effect will the decreased iron availability have on the production of diphtheria toxina. The lack of corepressor binding to DtxR will lead to a loss of repression and an increase in the production of toxin.b. The corepressor will not be able to interact with the operator and will cause an increase in the production of toxin.c. The repressor will not be active, therefore toxin production will decrease.d. Without the compressor to interact with the operator, the repressor will stay bound to the promoter leading to a decrease in the amount of toxin.