BIOLOGY MIDDLE SCHOOL

In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kW clothes dryer runs for 90 minutes to dry a load of laundry. How much did it cost to dry these clothes?A. $0.20
B. $0.30
C. $0.45
D. $0.60

Answers

Answer 1
Answer: D $0.60 because (5kW)x(90/60hours)x(8cents/kWh) = $0.60 --> D
Answer 2
Answer:

Answer:

D

Explanation:

Related Questions

Harmful algal blooms are characterized by a rapid increase in the population of a type of algae that produces toxins. Toxins are chemicals that are poisonous to living things. The rapid reproduction of this type of algae is caused by the presence of sunlight, warm water, and an increase in the level of nutrients in the water. The nutrients come from farms that use chemicals to make their plants healthy. They are carried to lakes and rivers by runoff. Suppose this scenario was modeled in the lab. How would the populations of the biotic factors be affected? Check all that apply. Mosquito larvae will increase. Heron population will increase. Algae population will increase. Trout population will decrease. Minnow population will decrease.
Daren has sickle-cell disease. Because of the disease, some of Daren's blood cells are long and thin instead of being disk-shaped. Daren's father also suffers from sickle-cell disease, but his mother and two sisters do not. This is an example how A. a person can choose which genes he or she will inherit. B. cells can be influenced by genetic factors. C. cells always repair damaged genes immediately. D. a person cannot survive if even one cell becomes damaged.
Which description is true about eukaryotes but not prokaryotes
How many chromosomes are in human​
Manuel is performing a scientific investigation to determine whether fertilizer A or fertilizer B is more effective at increasing the growth rate of tomato plants. Manuel measures and separates 30 tomato plants into two equal groups that are planted in identical environments. He gives one group fertilizer A, and gives the other group the same amount of fertilizer B. During the first week of the investigation, he gives the tomato plants in both groups the same amount of water. During the second week, however, he forgets to water the tomato plants being given fertilizer B, but still provides water for the tomato plants being given fertilizer A. Two weeks after planting, Manuel measures the tomato plants and discovers that the tomato plants given fertilizer A have grown much more rapidly than the tomato plants being given fertilizer B. Manuel's resultsA. are not valid because one of the variables was not controlled during week 2. B. are valid because he controlled all of the variables in week 1. C. are valid because he designed his experiment correctly. D. are not valid because he should not have grown the plants in identical environments.

a white blood cell ingests then digests a number of bacteria which cell organelles were directly responsible for the digestion of bacteria

Answers

Bacteria of white cell

explain how an ocean current can affect the temperature and the amount of moisture of the air mass anove the current and above nearby coastline

Answers

it is all connected as current takes place moisture changes

Which of the following characteristics is common to organisms in Kingdom Eubacteria? A. live without oxygen B. live in less extreme environments than most archaebacteria C. live in the hottest and coldest places on Earth D. are multicellular

Answers

B. They live in less extreme environments as Archaebacteria

Archaebacteria live in harsh environments. , in the hottest and coldest placed on earth, plus Eubacteria are single cellled.

Eubacteria, unlike Archaea, generally live in less extreme environments. They are unicellular, prokaryotic, lack nuclei, and unlike many Archaea, cannot live without oxygen.

Organisms in the Kingdom Eubacteria, also known as the domain Bacteria, are unicellular prokaryotic organisms without nuclei.

Compared to organisms in the domain Archaea, which often thrive in extreme environments, organisms in Kingdom Eubacteria generally live in less extreme environments, making option 'B' the correct answer to your question.

They are found in variety of habitats and can adapt to a broad range of conditions, but they do not typically favor the same harsh, extreme environments that many Archaea do.

They also lack the adaptation to live without oxygen seen in some prokaryotes, like certain Archaea.

Learn more about Kingdom Eubacteria here:

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1.Having spent much time in sunlight during youth, an older person develops skin cancer and has the growths removed. What environmental mutagen causes the growths to keep coming back AND why might the growths keep coming back?2.Is a mutation that happens during meiosis likely to affect a single gene or an entire chromosome? Explain.

Answers

1. remaining skin cells still have the mutation that causes the cancer in their DNA, even if the symptoms are removed

2. it is likely to affect an entire chromosome because during meiosis there may be errors in crossing over when the condensed chromosomes can exchange large parts of the chromosomes in error

Which of the following structures produces proteins in both eukaryotic andprokaryotic cells?
A. Nucleus
B. Cytoplasm
C. Mitochondrion
D. Ribosome

Answers

The answer is D. Ribosome

Answer:Cells need to make proteins. ... While a structure such as a nucleus is only found in eukaryotes, every cell needs ribosomes to manufacture proteins. Since there are no membrane-bound organelles in prokaryotes, the ribosomes float free in the cytosol. Ribosomes are found in many places around a eukaryotic cell.

Explanation:

What are two types of selective breeding and how do they compare?

Answers

One way is to eg: two sheep. If you take and egg from the sheep and sperm from a sheep. Then u extract te DNA u want and put it into an empty egg cell. This then gets inserted into a mother and the baby sheep will be born. The second option is to take just a female egg. And take all the DNA from that and then you will have an exact replica. Or you just have inbred a family. They will all be very similar but it will cause a few defects. Hope this helps :-)
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