BIOLOGY HIGH SCHOOL

Blood enters the heart from the arteries.

TrueFalse

Answers

Answer 1

Answer: I believe that is false. Arteries are for exiting the heart, veins are for returning to the heart.

Answer 2

Answer:

false

hope I helped you

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Sort the given molecules into organic and inorganic substances. C3N2H4 AlBr3 C6H5F CrO3 H2O2 C12H22O11

Answers

We can easily distinguish between organic and inorganic molecules cust by looking at their molecular composition.
Organic molecules are always made out of carbon (C) atoms. Hydrogen atoms (H) are often bound with them in organic molecules, with the addition of other atoms like nitrogen (N), fluorine (F) etc.
So, the organic molecules from the list above are C3N2H4 (imidazole) C6H5F (fluorobenzene) and C12H22O11 (sugar named sucrose) .

The rest of the molecules are inorganic H2O2 (peroxide), CrO3 ( chromium trioxide) and AlBr3 (aluminum bromide)

______________ can be used to date fossils in rocks to give an approximate age.

Answers

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Explanation;

Radiocarbon dating is a technique for defining the age of an object involving organic material by using the properties of radiocarbon, a radioactive isotope of carbon.c material through using the properties of radiocarbon, a radioactive isotope of carbon. The development of radiocarbon dating has had an intense influence on archaeology

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Explanation;

Radiocarbon dating can be used to date fossils in rocks to give an approximate age.

Many energy sources use turbines to generate electricity. What is one type of energy source that does not use turbines? A. Coal B. Hydroelectric C. Wind D. Solar

Answers

Solar power does not use turbines.

To living organisms, the most dangerous debris from tephra is probably _____, because it spreads so widely

Answers

The answer is volcanic ash.

Tephra is fragmented material ejected by an erupting volcano into the air. Volcano ash is a small fragment of tephra, and since it is light it can spread so widely. It is harmful to ecosystems. It may contain some gasses, such as carbon dioxide or fluorine, which are toxic to organisms, and thereby affect on crop failure, organism death, some deformity, and illness.

To living organisms, the most dangerous debris from tephra is probably volcanic ash , because it spreads so widely.

1 2 3 4 5 6 7 8 9 10 Which process occurs when bacteria converts nitrogen gas to a usable form? a. Decomposition b. Condensation c. Fixation d. Transpiration

Answers

The process in which bacteria convert nitrogen gas into a usable form is **c. Fixation.** Nitrogen fixation is a vital step in the nitrogen cycle, where atmospheric nitrogen gas (N2) is converted into ammonia (NH3) or related compounds that plants can use for growth.

What is the definition of a Nucleolus?