BIOLOGY HIGH SCHOOL

Which of the following makes up the dense outer layer of bone?a. compact bone
b. spongy bone
c. bone marrow
d. periosteum

Answers

Answer 1
Answer: The answer to the question is

A. compact bone

Compact bone is dense and hard, which makes it strong. Spongy bone, further inside, has many gaps and is lightweight. This allows bone to be strong and light at the same time.
Answer 2
Answer: The answer to your question is the compact bone .

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A cell forms glycogen from simple sugars when food is plentiful. Which statement describes this process?A It is a catabolic reaction that is endothermic.B It is an anabolic reaction that is endothermic.C It is a catabolic reaction that is exothermic.D It is an anabolic reaction that is exothermic.
What’s the answer to this question i’m confused.
Select all that apply.Perspiration _____. helps cool the body removes waste chemicals through pores in the skin keeps the skin soft keeps the body warm
Which of the following organisms Is most likely to obtain nutrition via photosynthesis?
Which of the following is NOT a nitrogen base in DNA?A. Uracil B. Thymine C. Cytosine D. Guanine

PLEASE SOMEONE HELP MESS

Answers

Answer:

It's B.

Explanation:

uhm, i already went in one? btw, why "mess"? ️ ️

If each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy ,how much of that energy is left after the third trophic level

Answers

The energy that is left after the third trophic level is 10 kcal.

How much of that energy is left after the third trophic level?

  • The first trophic level uses 1000 kcal.
  • The second trophic level used 100 kcal.
  • So, the third trophic level uses 10 kcal leaving 1 kcal.
  • The energy is transferred from trophic level to trophic level, and approximately 90% of it is lost each time.
  • With some of it being lost as heat into the environment (as a result of respiration) and some being lost as partially digested food.

Hence, if each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy, the energy that is left after the third trophic level is 10 kcal.

To know more about energy flow in trophic levels, refer to: brainly.com/question/17249801

#SPJ2
There is 10 kcal energy left in the 3rd trophic level.

What happens to the amount of biomass at each tropic level ?

Answers

organisms tend to be larger in size at higher trophic levels, but their smaller numbers result in less biomass. biomass is the total mass of organisms at a trophic level.

Plant cells have a large central vacuole, which animal cells lack. What function does this organelle perform

Answers

Answer:

It provides rigidity to the plant cell when filled with water.

Explanation:
They store water, wastes, nutrients, among other things.
Hope that helped you.

Why water shortages are expected to be such a widespread problem in the future.

Answers

It is true that earth is consist of 70% water. However it is still a problem that in the near future, their might be a water shortage that will happened. This is because now mostly of our water sources are no longer clean. Our water are polluted and when time will come water will be very pricey

Answer:

Water scarcity is the lack of sufficient available water resources to meet water needs within a region. It affects every continent and around 2.8 billion people around the world at least one month out of every year. More than 1.2 billion people lack access to clean drinking water.[1]

Water scarcity involves water shortage, water stress or deficits, and water crisis. The relatively new concept of water stress is difficulty in obtaining sources of freshwater for use during a period of time; it may result in further depletion and deterioration of available water resources.[2] Water shortages may be caused by climate change, such as altered weather-patterns (including droughts or floods), increased pollution, and increased human demand and overuse of water.[3] The term water crisis labels a situation where the available potable, unpolluted water within a region is less than that region's demand.[4]Two converging phenomena drive water scarcity: growing freshwater use and depletion of usable freshwater resources.[5]

Explanation:

Which sentence lists events in the cell cycle in correct order, from earlier to later?The chromosomes become longer and thinner; spindle fibers attach to the centromeres.
The nuclear membrane reforms; the chromosomes align in the middle of the cell.
The chromosomes replicate; the nuclear membrane dissolves.
The sister chromatids are separated; the chromosomes condense.
Which term below describes a piece of DNA that provides a set of instructions to a cell to make a specific protein?
gene
chromosome
trait
homologous chromosome

Answers


2. Chromosome is the instruction that consist the gene. A gene is a hereditary unit that is made up of  a sequence of DNA that occupies a specific location or site  on a chromosome, and which can be transcribed or copied into an RNA molecule that may function just as it is, or be translated  into amino acids.
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If there is a high death rate and large amount of , populations will likely decrease.
Closely related species often look similar but have courtship rituals that are slightly different. a. increase competition between the species b. increase communication between the species c. ensure that mating occurs between member of the same species d. promote the evolution of new species through inter breeding