BIOLOGY MIDDLE SCHOOL

Question 2 of 102 Points
How many hydrogen atoms are present in each water molecule?
O A. 3
O B. 2
O c. 1
O 0.4​

Answers

Answer 1
Answer:

Answer: 2

Explanation:

Water molecule has a chemical formula of H2O, from the formula: two hydrogen atoms (H) are linked to a oxygen atom (O) by hydrogen bond.

Thus, the answer is 2
Answer 2
Answer:

answer H2O meaning 2 hydrogen and 1 oxygen. This is the recipe for water basically.

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Two students completed an experiment to determine if pesticide use at local farms was causing fish kills in a local pond. The steps of the experiment are listed below. 1.Select different locations to collect water samples in the pond. 2.Collect a 5-mL water sample at 8 am at a different location each day for 10 days. 3.Measure the amount of pesticide present in each sample using the same measurement tools. After analyzing their data, the students conclude that pesticide runoff from farms is not causing the fish to die in the pond. Which of these statements best describes why their conclusion is not valid? a. The amount of water collected each day was the independent variable. b. The daily location for sample collection was not a controlled variable. c. Pesticide measurements were the dependent variable. d. The time of sample collection was not a controlled variable.
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Which evidence for the age of the earth is indicated by the fact that sedimentary rocks is found on mountain tops

Answers

Sedimentary rock forms *over time,* which means that those rocks had to form over millions of years, proving that the Earth has been forming and changing all this time.

Which structures are found only in plant cells, not inanimal cells?
O A and B
O B and C
OC and D
OD and A

Answers

Answer:

B and C

Explanation:

i wish i can screenshot u i got it right but ima just tell u the answer lols
there doesn’t seem to be a page or photo linked with this question. where are the answer choices? surely a, b, c, and d must mean something

Say it costs $2.25 to ride the T. If you ride 2 times a day for the month of July how much would you spend?

Answers

$2.25*31*2=139.5

You will spend $139.5 on July

In sickle-cell disease, an allele produces red blood cells with an abnormal shape, which affects many othertraits in the same individual. What genetic behavior does this describe?
O polygenic
O codominance
O dominance
O pleiotropy

Answers

Answer:

Pleiotropy

Explanation:

The pleiotropic is a type of genetic behaviour which influence and affect more than one trait. Sickle cell anemia disease is a type of pleiotropism. In sickle cell anaemia patients, haemoglobin A is entirely replaced with haemoglobin S. Such patients have the genotype HBs HBs. Heterozygotes who carry the sickle cell gene HBa HBs are said to have a condition called sickle cell trait thus the expression of two different genotypes by one single gene indicates pleiotropism.

Haemoglobin S crystallizes when oxygen concentration is low in capillaries making the red blood cells to assume a crescent or sickle shape. Such cells transport oxygen very poorly leading to anaemia.

Of the three body regions of a grasshopper which one is specialized for movement

Answers

The thorax, it has the wings and legs attached to it.

Water molecules are attracted to the molecules in the wall of the glass container

Answers

adhesion water sticking to a foreign substance. cohesion is water sticking to itself.
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