According to the current theory, the Earth's moon was formed __________. a.
together with Earth
from a portion of Earth
separately from Earth
from a leftover star


Answer 1

Answer: together with earth.

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Bile produced in the liver is stored in the ________ before entering the intestine.


The answer to this question is the gallbladder. The gallbladder is a small organ under the liver that stores bile that came from the liver. The gallbladder functions as a tool to transfer the bile that is used to break-up the fatty foods in the small intestines and it also function to drain waste.    


What is the advantage for a species of pregnancy and lactation?


Pregnancy ensures that the baby develops from a fertilized under the shelter and close protection of the mother. Lactation also provides the opportunity for the offspring to receive nutrients directly from the mother until it grows to a considerable size. This dependency on the mother and maternal care increases the survival rate of the offspring.


What creates the Van Allen belts? A. Earth's aurora borealis B. Earth's gravity C. Earth's magnetosphere D. Earth's mantle convection.



C. Earth's magnetosphere

  • The Earth belts are known as Van Allen belts as their discovery is credited to James Van Allen. These two belts are the inner an Allen belt and the outer Allen belt.
  • Van Allen belts are caused by deflection of charged particles. they are located in the inner region of the Earth's magnetosphere. these belts trap energetic electrons and protons.
  • The inner belt contains high concentrations of electrons and energetic protons, which have been trapped by strong magnetic fields in the region, the outer belt on the other hand contains high energy electrons trapped by the magnetosphere.
The Van Allen belts are created by a planet's magnetic field. Therefore C. Earth's magnetosphere is the correct answer 

Aerobic cellular respiration generates about ______ atp from one glucose.\


36-38 ATP including Glycolysis. 34-36 with only Krebs and E.T.C.

What is a scientific theory? A. 

a reasonable guess based on instinct


an imaginative idea explaining natural phenomena


a broad, evidence-based explanation for a phenomenon


a tentative statement with little or no predictive power


C a broad,evidence-based explanation for a phenomenon
I belive your answer would be between d and c but if i was to answer i would pick c

The shellthe shell the footthe foot the mantlethe mantle the visceral massthe visceral mass gillsgills the radulathe radula the open circulatory systemthe open circulatory system a) true
b) false


Answer & explanation:

Gills are an adaptive structure for fish and other aquatic animals to survive in the aquatic environment.

They are blade-shaped and highly vascularized, allowing gas exchanges between the ambient water and the animal's blood.

Water enters the mouth and is led through the gills, being eliminated by gill slits, then oxygen is distributed in the blood to the animal's body.





A scientist uses materials in her lab to turn one piece of dna into 100 copies of the same piece what process is the scientist using Use of restriction enzymes
Polymerase chain reaction
Gel electrophoresis


Answer: The correct answer is- Polymerase chain reaction.

Polymerase chain reaction is a technique in molecular biology that is used to produce multiple copies of a piece of DNA molecule through multiple cycles of three stages that are-

1) Denaturation- The two DNA strands are separated  ( so that template DNA are exposed) at higher temperature.

2) Annealing- Primers ( forward and reverse) are attached to the template DNA.

3) Extension- New DNA strand is synthesized using enzyme Taq polymerase that adds dNTPs ( deoxyribonucleoside triphosphate) according to the complementary sequences in the template.        


The process, which is used for the in vitro (outside an organism or in lab conditions) amplification of sample DNA molecule is known as PCR or polymerase chain reaction. With the help of PCR, a single piece of DNA can be amplified into thousands of copy within few minutes.

The PCR is divided into three steps, denaturation, primer annealing, and extension. During denaturation, the double stranded DNA gets separated to provide two template strands.

During primer annealing, small primers or oligonucleotides bind to the template DNA to start the process of polymerization. Extension involves elongation of new DNA strands by addition of nucleotides to the annealed primers.

Thus, the correct answer is option). 'polymerase chain reaction.'


The S phase in the cell cycle is the


It is the part of the cell cycle in which the dna is replicated! vote me brainliest please :) ❤️

HURRY HELP ME PLZ If the tussock moth population increases rapidly, trees that people want to use can be damaged. One solution is to use an insecticide that kills moths to keep the moths from damaging trees. Describe two possible unintended consequences of using insecticides. In your description, be sure to: 1. Describe two effects of insecticide use on the forest ecosystem other than the intended reduction of moths to protect the trees. 2. Describe how each effect causes a change in another part of the forest ecosystem.




1. Describe two effects of insecticide use on the forest ecosystem other than the intended reduction of moths to protect the trees.  

1. Insecticides when sprayed on a certain areas or spots can be blown by the wind to other areas or flow with rain water into nearby streams or local water bodies or seep through the soil into ground water. This is called indirect application or secondary poisoning,

2. Insecticides can affect the food chain because they reduce the biomass of primary consumers and there is is less food available to secondary consumers which eat poisoned plants or prey those who have been exposed to pesticides.

Insecticides can travel great distances through the environment and they can also flow with rain water into streams so fish can be directly or indirectly impacted by pesticides. The phenomenon of nutrient enrichment of aquatic bodies is known as eutrophication, which deteriorate the water quality leading to death of fish. Some long-term exposures cause abnormalities or mutations in developing fish larvae, while acute exposure can cause immediate fish die-offs. The liver, kidney, brain and gills of exposed fish are extremely vulnerable to chemical exposure.

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