Answer:
Vaccines work in much the same way. They expose your body to an antigen that trains your immune system to fight that germ in the future. Because vaccines contain weakened or killed versions of viruses, you become immune without getting sick.
Answer:
Getting it or something that is proven by scientists that will cure it.
Explanation:
Something I've learned is if you get a virus and it goes away your body will build an immunity.
1.) Define Pure substances:
2.) What are the two different types of Mixtures?
3.) What are solvent and solute? Give an example for both.
Explanation:
The substances that are free from any kind of mixture and contain only one kind of particle are pure substances.There are two types of mixtures: heterogeneous and homogeneous.Solvent is, in simplest terms, something in which you dissolve another substance (also called as solute) and this mixture will yield what we know as a 'solution'. ... Some examples of solvents are water, ethanol, toluene, chloroform, acetone, milk, etc. Examples of solutes include, sugar, salt, oxygenHelp meee
Which of these changes is a possible negative consequence of farmers allowing livestock to overgraze a pasture?
A. Shortage of freshwater
B. Deforestation
C. Desertification
D. Abundance of clean air
Answer:
B. Deforestation
what color is the sky...
Answer:
A cloudless sky in the daytime, appears blue to the human eye.
but that is only bc of the water so really we never know
Explanation:
Answer:
the sky is purple and yellow is good
Is the Harvard Forest a carbon source or a carbon sink, and how has the net ecosystem exchange (NEE) changed over time?
Answer:
This is strong evidence that suggests that the forest acts as a carbon “sink”: each year, it removes more CO2 from the air than it produces.
Explanation:
There are different sources of carbon. Harvard Forest is known to be a carbon sink.
Harvard Forest is known to have active C sink that is due to the forest regrowth after land abandonment.
Net ecosystem exchange is known to be negative every year. but the result is shown to be very variable. Result also show a decrease over time and this implies that the forest is removing more CO2 from the atmosphere presently than before.
When you look at the data of the last 25 years, there is a pattern of NEE being negative and also many variability.
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Which of the following could be a gene?
A.
B.
C.
D.
Answer:
answer :,??LETER .BExplanation:
Yan po tqWhat’s the labels in the boxes
How does thermohaline circulation force the thermocline toward the
ocean's surface?
Thermohaline circulation begins in the Earth's polar regions. When ocean water in these areas gets very cold, sea ice forms.
What is Thermohaline circulation?The thermohaline circulation (THC) is that part of the ocean circulation which is driven by fluxes of heat and freshwater across the sea surface and subsequent interior mixing of heat and salt.
What is polar region?The areas of the Earth that encircle its geographical poles and are contained inside the polar circles are known as the polar regions, sometimes known as the frigid zones as well as polar regions.
These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity. This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice.Thermohaline circulation begins in the Earth's polar regions. When ocean water in these areas gets very cold, sea ice forms. The surrounding seawater gets saltier, increases in density and sinks. Winds drive ocean currents in the upper 100 meters of the ocean's surface.
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DNA polymerase always adds nucleotides to the ____ end of the leading strand and the ____ end of the lagging strand.
Answer:
1.Deoxyribose
2.Backbone
Explanation:
what invention allowed scientists to study cells for the first time?
in which stage of meiosis do homologous chromosomes or homologs separate?
Answer:
anaphase I homologous pairs separate
A male from species A mates with a female from species B. Male A’s sperm swims and finds the egg, but the sperm is unable to penetrate the egg. This is an example of
Answer: Gametic isolation
Explanation:
Sperm of one species may not be able to fertilize the eggs of another species. For instance, sperm may not be able to survive in the reproductive tract of females of the other species, or biochemical mechanisms may prevent the sperm from penetrating the membrane surrounding the other species' eggs
Research suggests that a permissive parenting style usually has the best outcome for children.
True
False
False
Explanation:
Becuase this may make the children very bad and unpolite in the future.
Look at the table for energy used in activities. James goes walking for 1.5 hours a week and running for 0.5 hours. James has a mass of 65kg. How much extra energy will he need a week in order to go running and walking?
The extra energy needed by James in a week is 1950 joules.
Dimensionally speaking, the energy ([tex]E[/tex]) , in joules, need by a person while doing an activity is defined by the following expression:
[tex]E = m\cdot t\cdot c[/tex] (1)
Where:
[tex]m[/tex] - Mass, in kilograms.[tex]t[/tex] - Time, in hours.[tex]c[/tex] - Energy index, in joules per kilogram-hour.The extra energy needed by James is the sum of the energy spent both by running and walking:
[tex]E = 65\,kg \times \left(1.5\,h \times 10\,\frac{J}{kg\cdot h} + 0.5\,h \times 30\,\frac{J}{kg\cdot h} \right)[/tex]
[tex]E = 1950\,J[/tex]
The extra energy needed by James in a week is 1950 joules.
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Which of the following ocean-floor features is associated with trenches?
Answer:
so you know how much is it
Match each vein with the correct label. (leg)
Answer:
1. Common Iliac
2. Femoral
3. Popliteal
4. Small Saphenous
Explanation: is correct
which option would help maintain homeostasis during exercise?
Answer:
As your body converts food into energy during exercise, it produces heat as a waste product. This extra heat can elevate your body temperature above the typical 98.6 degrees. To maintain homeostasis, the blood vessels in your skin dilate to allow more blood flow to the surface of your body where it disperses the heat.Jan 10, 2019
Explanation:
Answer:
Speeding up the rate of breathing
Explanation:
Because plants don’t have interior or skeletons , they rely on their cells all’s to give them structural support, how does it different form animal cells
What terrorist group became active in great britain in 1974?
Answer: Read the bottom the explaination
Explanation:Accordingly, the IRA began a series of terrorist attacks on Britain's mainland. The IRA began its campaign when in February 1974 a bomb exploded on a bus that was transporting soldiers and their families to an army base in North Yorkshire; 12 people were killed, including two young children.
Answer:
The Real Irish Republican Army (RIRA)
How did building a model of the stages of cell division help you? Be sure to explain.
Answer:
I don't know oo the answer hard sha
Two tomato plants are cross pollinated to produce tomato plants that produce more tomatoes.
A) Genetic engineering
B) Selective breeding (Artificial selection)
Answer:
Genetic Engineering
Explanation:
Image result for Two tomato plants are cross pollinated to produce tomato plants that produce more tomatoes.
When tomatoes cross pollinate, the genetic material of the two tomato varieties will combine and the seeds will be hybridized. Cross pollination will not affect the fruit, only the seeds inside.
Answer:
b
Explanation:
selective breeding Artificial selection
which of the 3 types of blood vessels carries blood to the body, away from the heart?
Answer:
The arteries carry blood away from the heart.
I store food, water, and waste by products in the cell; Who am I?
A. Nucleolus
B. Mitochrondria
C. Ribosomes
D. Vacuoles
which best describes the role of molecular oxygen in cellular respiration
Explanation:
What best describes the role of molecular oxygen (O2) in aerobic respiration? It accepts electrons when reacting to form water. ... The processes of photosynthesis and cellular respiration both involve exchanges of two gases—oxygen and carbon dioxide—with the atmosphere.
Which part of the brain has the most motor connections and is the location for the upper motor neurons
Answer:
cerebral cortex
Explanation:
Upper motor neurons are located in your brain and spinal cord. They send signals to lower motor neurons.
The upper motor neurons originate in the cerebral cortex and travel down to the brain stem or spinal cord, while the lower motor neurons begin in the spinal cord and go on to innervate muscles and glands throughout the body.
Why is DNA called the universal genetic code?
A.) All DNA is contained in the nucleus of a cell.
B.) DNA has been found on every planet in our universe.
C.) All organisms are made up of DNA which is made up of nucleotides.
D.) DNA is found in animal and plant cells, but not in bacteria.
Answer: C
Explanation: flvs exam
DNA is called the universal genetic code because, all organisms are made up of DNA which is made up of nucleotides. The nucleotides present in all organism is of the same types but they differ in the arrangements.
What is DNA ?Deoxyribonucleic acid or DNA is the basic unit of the genetic material in every level of living organism. DNA is the hereditary material that is inherited from the parent cells to the daughters cells during reproduction.
A DNA molecule is made of a ribose sugar a phosphate group and a nucleoside. Two such strands are joined together to form a DNA sequence where, the two strands are connected through the nitrogen bases adenine, guanine, cytosine and thymine as a the steps in a stair case.
The helical structure of DNA is same for all kind of organisms however, the arrangement of nitrogen bases differ. Animals, plants, fungi, bacteria, virus, and all other prokaryotes even contain DNA in their cells. Hence it is called the universal genetic code.
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True or False: (&Why) Arteries are elastic and muscular.
Answer:
TRUE
Explanation: *internal screaming
The greatest cause of the worldwide loss of species is ________. habitat destruction climate change air pollution water pollution decreased soil nutrients
Answer:
The greatest cause of the worldwide loss of species is climate change.
3. In general, metals are ____.
a
poor conductors of heat
b
brittle
c
poor conductors of electricity
d
good conductors of heat
Answer:
D
Explanation:
Answer:
good conductors of heat
Explanation:
Sketch and label a general life cycle diagram of a
gymnosperm. Your diagram must include the following: female cone, male cone, pollen grains, scale, seeds, eggs, adult sporophyte, pollination, germination, fertilization.
Answer:
?
Explanation:
Characteristics of Gymnosperms
Gymnosperms are seed plants adapted to life on land; thus, they are autotrophic, photosynthetic organisms that tend to conserve water. They have a vascular system (used for the transportation of water and nutrients) that includes roots, xylem, and phloem. The name gymnosperm means “naked seed,” which is the major distinguishing factor between gymnosperms and angiosperms, the two distinct subgroups of seed plants. This term comes from the fact that the ovules and seeds of gymnosperms develop on the scales of cones rather than in enclosed chambers called ovaries.
Gymnosperms are older than angiosperms on the evolutionary scale. They are found far earlier in the fossil record than angiosperms. As will be discussed in subsequent sections, the various environmental adaptations gymnosperms have represent a step on the path to the most successful (diversity-wise) clade (monophyletic branch).
Gymnosperm Reproduction and Seeds
Gymnosperms are sporophytes (a plant with two copies of its genetic material, capable of producing spores ). Their sporangia (receptacle in which sexual spores are formed) are found on sporophylls, plated scale-like structures that together make up cones. The female gametophyte develops from the haploid (meaning one set of genetic material) spores that are contained within the sporangia. Like all seed plants, gymnosperms are heterosporous: both sexes of gametophytes develop from different types of spores produced by separate cones. One type of cone is the small pollen cone, which produces microspores that subsequently develop into pollen grains. The other type of cones, the larger “ovulate” cones, make megaspores that develop into female gametophytes called ovules. Incredibly, this whole sexual process can take three years: from the production of the two sexes of gametophytes, to bringing the gametophytes together in the process of pollination, and finally to forming mature seeds from fertilized ovules. After this process is completed, the individual sporophylls separate (the cone breaks apart) and float in the wind to a habitable place. This is concluded with germination and the formation of a seedling. Conifers have sperm that do not have flagella, but instead are conveyed to the egg via a pollen tube. It is important to note that the seeds of gymnosperms are not enclosed in their final state upon the cone.
Answer:
Gymnosperms produce both male and female cones, each making the gametes needed for fertilization; this makes them heterosporous.
Megaspores made in cones develop into the female gametophytes inside the ovules of gymnosperms, while pollen grains develop from cones that produce microspores.
Conifer sperm do not have flagella but rather move by way of a pollen tube once in contact with the ovule.
The difference between organisms are
A. Mutation
B. Variation
C. Natural Selection
Answer:
B. Variation
Explanation:
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