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Heirloom seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production. Heirloom seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production.
As a diver descends, the increase in pressure causes the body’s air pockets in the ears and lungs to do what?
What type of friction is friction that acts on objects when they are sliding over a surface?
Ozone is made when a electric spark passes through air, and this accounts for the characteristic odor give off by some electrical motors. Ozone is a compound formed when there is sparking electrical equipment.
One way that the moon is different from earth is that the moon has almost no atmosphere.
Not surprisingly, what is the function of the most developed part of a bird's brain?
The volume of a regularly shaped solid can be calculated from its dimensions.
The pleura that surrounds the lungs consists of how many layers?
You decrease errors in an experiment by take many measurements.
What is the name of the scientist who named neutrinos?
What is an isotope that is radioactive called?
The female reproductive system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus.
Melanocytes are located in the bottom layer of the epidermis.
Producing light without heat is called luminescence.
Nuclear enevelope is a double membrane of the nucleus that encloses the genetic material.
There are two different main types of diabetes.
An object that is opaque, will not allow the rays of light to pass through at all. Opaque is the term for matter that does not let any light pass through.
The cell expels waste and other particles through a process called exocytosis.
A(n) electroscope is used to study charge.
Immovable joints allow no movement because the bones at these joints are held securely together by dense collagen. Dense collagen secures together immovable joints and prevents them from moving.
The sharp projections that specialized cells grow are called spicules.
Biochemical reactions occur inside organisms.
The number of particles of a substance in a given volume is known as the concentration.
Through what method or methods of fertilization do amphibians sexually reproduce?
The sound in a loud classroom is an example of a form of energy.
The blastocyst consists of an inner cell mass (embryoblast) and an outer cell mass (trophoblast). The cells of the blastocyst form an inner cell mass called the embryoblast.
Evaporation The process by which water is changed from the liquid into the vapor state. Evaporation is responsible for changing liquid water into water vapor.
in sexual reproduction, the offspring receives half of its genes from each of two parents and is genetically different from each of the parents. Sexual reproduction involves combining genetic material from two parents to create distinct offspring.
When Carl Woese first published his three-domain system, it was believed that the domains Bacteria, Archaea, and Eukarya were equally old and equally related on the tree of life. Carl woese constructed a tree diagram, separating living organisms into three domains.
Limiting the number of cars on the roads would most likely improve the air quality in large texas cities.
Momentum is directly related to both mass and?
Darwin believed in gradualism.
What term is used to describe the change in size or volume of a given mass with temperature?
An underwater spider uses shiny air bubble to breathe and keep alive.
Ocean waves are mainly caused by wind.
Light-dependent reactions of photosynthesis occur in the thylakoid membranes of chloroplasts. The light reactions take place in the thylakoid.
When the ground absorbs the water and it settles below the surface it is called groundwater.
Lipids are broken down by lipases.
Voltage is continuously changing within a circuit in an analog signal.
Weeds are simply those plants that grow where they are not wanted. Weeds are plants that grow where people don't want them to and can take up space and use resources which hinders growth of more desirable plants.
Centripetal force is the force that causes centripetal acceleration.
What system transports many substances to and from cells throughout the body?
Each ozone molecule is made up of three oxygen atoms. Three oxygen ions make up an ozone molecule.
A heterocyclic compound contains atoms of two or more different elements in its ring structure.
What is the decayed remains of living organisms called?
All members of a species living together form a what?
A pumpkin is a fruit.
An ether is an organic compound in which two hydrocarbon groups are bonded to the same oxygen atom.
What are unique about prokaryotic cells' organelles?
Saliva secretion initiates chemical digestion while also protecting the oral cavity.
The heart becomes the first working organ in the human body, pumping by rhythmically opening and squeezing shut just 17 days after conception. In humans, the heart is the first organ to form and become functional.
Monatomic ions form when a single atom gains or loses electrons.
Through what method or methods of fertilization do amphibians sexually reproduce?
A blue block appears blue in the sunlight if only blue light is reflected by the block.
Some kidney stones cause pain and must be removed from the body using surgery or ultrasound techniques. The option to remove kidney stones other than surgery is ultrasound treatments.
How many dimensions can humans see in?
Secondary consumers (which eat primary consumers) are considered to be trophic level 3.
What is the type of succession that happens after the destruction of a habitat?
Hormones send signals through your body.
A fact or question is only considered science if it has what property?
Among these was Antlia Pneumatica, the Air Pump, which he named in honor of the 17th century British chemist Robert Boyle, who invented the compressed-air pump. One of the earliest air pumps was made by robert boyle.
How do scientists know that some mountains were once at the bottom of an ocean?
Carbon atoms have six neutrons as well as how many protons?
Leaving no support for this massive dome, the roof of the magma chamber collapsed, forming the bowl-shape depression known as a caldera . After a massive eruption, a mountain collapsing above an empty chamber will create a caldera.
Carbon dioxide chemically weather rocks by creating acids.
How many moons does pluto have?
The complement system is a series of proteins constitutively found in the what?
Young roots and leaves are the major sites of gibberellin production.
How many times does Earth rotate on its axis in one day?
Ultrasound Sound waves of high frequencies above the range of hearing. You call sound that has a wave frequency higher than the human ear can detect ultrasound.
Lava that enters the water is called pillow lava.
Rock a naturally formed substance consisting of one or more minerals . A mineral is described as a natural substance that makes up rocks.
When the helium is gone, the stars become what?
Control rods play an important role in the modulation of the nuclear chain reaction.
What is the study of the relationship between electricity and chemical reactions called?
Proteins are complex organic molecules that make up cells.
The cardiovascular system moves nutrients and other substances throughout the body.
Through what method or methods of fertilization do amphibians sexually reproduce?
Which two observations are both used to describe weather?
Roundworms exemplify what type of organization, where two or more types of tissues work together to perform a particular function as an organ?
Since the electric field lines point radially away from the charge, they are perpendicular to equipotential lines.
You call the movement of molecules across a membrane without the input of energy passive transport.
The action of flushing the toilet, performed multiple times daily, is the single biggest use of water in the home.
The dermis contains most of the structures found in skin.
The best way humans can conserve water is to use less.
A(n) concussion is the most common type of brain injury.
What type of reproduction takes place when an animal simply divides into two parts?
How do reptiles typically reproduce?
What play several important roles in the human body?
The study of energy and energy transfer involving physical matter is what?
Hemoglobin is a carrier molecule that becomes less effective at binding oxygen as temperature increases.
What is formed when an element gains one or more electrons?
Dengue fever and yellow fever are examples of diseases caused by what type of pathogen?
Heirloom seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production.
Once bile enters the gut, the conjugated bile acids assist in the absorption of dietary fats. Bile salts produced by the liver assist in breaking apart dietary fats.
Where does the small intestine begin?
What is the most numerous species on the planet?
What property is the result of the force of gravity being opposed by the normal force?
What type of feedback intensifies a change in the body’s physiological condition rather than reversing it?
All vertebrates reproduce sexually.