plz help me I will give brainlyest to first right answer

Answer:

Whether or not a given isotope is radioactive is a characteristic of that particular isotope. Some isotopes are stable indefinitely, while others are radioactive and decay through a characteristic form of emission. As time passes, less and less of the radioactive isotope will be present, and the level of radioactivity decreases. An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by coTnditions and is independent of the initial amount of that isotope.

Consider the following example. Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed from hydrogen-3 to helium-3 by emitting a beta particle, so that only 50.0 g of the original tritium remains. After another 12.3 y—making a total of 24.6 y—another half of the remaining tritium will have decayed, leaving 25.0 g of tritium. After another 12.3 y—now a total of 36.9 y—another half of the remaining tritium will have decayed, leaving 12.5 g. This sequence of events is illustrated in Figure 15.1 “Radioactive Decay”.

Explanation:

Answer:

To scale means it's the same size as in real life, as in 1 foot = one foot

Scaled means it's shown either larger or smaller, as in 1 foot = 1 inch or 1 foot = 1 mile

Explanation:

Answer:

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.

Explanation:

Answer:

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.

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Answer: Excretion is the removal from the body of waste products which result from normal life processes. Waste products such as carbon dioxide must be removed. If they are allowed to accumulate they cause poisoning which slows down vital chemical reactions.

Explanation:

Intense heat at Earth's core creates movement in the mantle, which in turn leads to movement in the crust as the earth has three layers, such as the innermost core and the outermost crust layer.

The earth is composed of several layers, each with unique properties and characteristics, such as the core, mantle, and crust, the core is made up of two layers: the inner core and the outer core, while the inner core is made up of solid iron and nickel and the outer core is a liquid layer of iron and nickel, the mantle is the thickest layer of the earth and is made up of solid rock present outside of the core, and the crust is the outermost layer of the earth and is made up of solid rock.

Hence, intense heat at Earth's core creates movement in the mantle, which in turn leads to movement in the crust as the earth has three layers, such as the innermost core and the outermost crust layer.

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Explanation:

hypothesis is the last one

data is the 3rd one

inference is the 2nd one

and control group is the first one

process of elimination is your best friend

Answer:

18000

Explanation:

you add all the mean Annual precipitation

Answer:

Last time I checked its B

Explanation:

Trust me

Answer:

B.) Nucleus

Explanation:

Prokaryotic Cells , They do not have a nucleus or other membrane-bound organelles. In prokaryotic cells, the DNA, or genetic material, forms a single large circle that coils up on itself.

Answer:

A. Bees and Butterflies receive food while pollinating the flowers.

Answer:Hi! It’s the type of liquid/third answer

Explanation:

This is the independent variable because it’s the component of the experiment that is being changed to measure the results.

Answer:

During glycolysis carbon dioxide is released

Explanation:

plzz mark me as a brainlist

Answer:

I think the answer is D. but I'm not 100% sure.

Answer:

The answer to your question is going to be A.

Explanation:

It teaches us how atoms work. and it also gives us more information about how and what they are!!

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Answer:

There are four significant figures.

Explanation:

Significant figures:

The given measurement have four significant figures 4.7.3 and 7.

All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.

Zero between the non zero digits are consider significant like 104 consist of three significant figures.

The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.

A!!!

Explanation:

getting better

The risk of chronic diseases linked to stress, anxiety, and substance addiction is also decreased by mental health services. Most importantly, mental health treatments improve the perspective for people who might feel lost and hopeless, while also saving lives. Thus, option A is correct.

All forms of medical care are included, unless specifically stated differently (below). Using prescription drugs or a non-prescription drug that has been diluted to a prescription level.

The diagnostic procedure serves as both a prelude to and a form of treatment in and of itself. Problems with behavior and physical health can both be helped by diagnosis when it is used as a therapeutic tool.

Therefore, people find that when they seek treatment for disorders. They often feel much better.

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Answer:

DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.

Explanation:

Answer:

A

Explanation

A. are brought to Earth's surface from its interior and to Earth's interior from its surface.

The tectonic plate boundaries, rocky material brought to the Earth's surface from its interior and from the Earth's surface to its interior. So, the correct option is A.

Tectonic plates are defined as huge pieces of Earth's crust and uppermost mantle that are made up of oceanic crust and continental crust. Earthquakes occur around major faults that mark mid-ocean ridges and plate edges.

These plates act like hard and rigid shells in comparison to Earth's mantle which is the strong outer layer called lithosphere. At tectonic plate boundaries, rocky material is brought to the Earth's surface from its interior and from the Earth's surface to its interior.

Therefore, the correct option is A.

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Answer:

its C

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Genetic Engeneering

For example you can introduce a virus(vector) that contains the genetic information necessary for the synthesis of the given enzyme that would normally be poorly synthesized in the sick patient. The vector will introduce the genetic material inside the cell of the  intesinal lining and the intestinal cell will secrete the substance.

Answer:

B.) A process of Energy conversion that captures light energy and transforms it into chemical Energy.

Explanation:

Aerobic respiration is the process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multistep process that produces roughly 36 ATP. The first step in is glycolysis, the second is the citric acid cycle and the third is the electron transport system.

Answer:

the correct answer D please give me brainlyest

Answer:

D.) Eukaryotic cells have all of these cellular components

Explanation:

In addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes. Each of these organelles performs a specific function critical to the cell's survival.

I took this test too :)

Answer:

I didn't know how to explain it very well so I had goog.le help me:

Sickle cell disease is caused by a mutation in the hemoglobin-Beta gene found on chromosome 11. Red blood cells with normal hemoglobin  are smooth and round and glide through blood vessels.

Answer:

The sticklebacks will remain a single species

Explanation:

When species leave in an area with favorable conditions, it feeds and reproduces freely, and when these conditions (availability of food, predator population) remain unchanged for a long period of time, the specie's physiology and habits would also remain unchanged (there would be no speciation).

Answer:

D

Explanation:

Answer:

D

Explanation:

The Mitochondria is the power house of a cell

the answer to your question is C.  SS and Ss

In cattle, the allele for short horns (S) is dominant over the allele for long horns (s) and two short horn cows are bred and produce four offspring, of which three have short horns and one has long horns, so the genotypes of the parents are Ss and Ss which are present in option B.

monohybrid cross in which a single trait is involved, such as the cow's horn length, and the short horn length is dominant over the long horn length, so the genotype of the purebred short horn is SS and the genotype of the purebred long horn is ss. The heterozygous parents will produce three short and one long horned offspring, as shown in the following cross.  

Hence, when two short horn cows are bred and produce four offspring, of which three have short horns and one has long horns, the genotypes of the parents are Ss and Ss which are present in option B.

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Answer: The number of adenines in one strand is equal to the number of thymines in the complemetary strand.

Explanation:

Deoxyribonucleic acid or DNA is a molecule that contains the genetic information in all living organisms. So it contains all the hereditary genetic information that has the instructions to development.  This DNA molecule consists of two strands that bond together to form a double helix structure. Each strand of DNA is made up of nucleotides which are basic chemical components made of a phosphate group, a sugar group and one of four types of alternative nitrogenous bases. The four types of nitrogenous bases found in the nucleotides are:

The sequence of these bases determines how genes are made, and each gene has different biological instructions to create proteins (that will have different functions in the organism). To form a DNA strand, the nucleotides are linked together in chains, alternating with the phosphate and sugar groups.

The nitrogenous bases are complementary between them. Adenine and thymine are complementary, as are guanine and cytosine. So since adenine is complementary to thymines, and cytosine is complementary to guanine, the number of adenines in one strand is equal to the number of thymines in the complemetary strand. And the number of cytosine is equal to the number of guanine.

DNA is composed of two complementary strands this is reflected in the fact of that - The amount of adenine in one strand is always equal to the amount of thymine in the complementary strand.

Thus, DNA is composed of two complementary strands this is reflected in the fact of that - The amount of adenine in one strand is always equal to the amount of thymine in the complementary strand.

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Answer:

The c

Meat Milk Leather labor

Explanation:

Answer:

B. The genetic variation for the trait was exhausted.

Explanation:

Oil content is a quantitative trait, ie., a phenotypic feature that depends on the accumulative effects of many genes and the interaction of a genotype with its environment. During crop improvement, the plants (i.e., lines) containing desired alleles involved in the variation of this trait will be selected, thereby increasing oil content but simultaneously decreasing the genetic variation of the population. In consequence, after successive rounds of artificial selection, lines will not have sufficient genetic diversity to be again selected for this trait.

Answer:

Frogs, ducks, sharks, snakes, bears, grasses, and trees.

Everything except bacteria.

Explanation:

All eukaryotes use cellular respiration in the mitochondria.

Prokaryotes, such as bacteria, do not have a mitochondria.