gymnosperms is an advance ground than pteridophytes ? justify​

there will be changes in the number of chromosomes

A mutation is a change in a gene. Mutations happen when a mistake is made when a cell’s chromosomes are copied. Mutations introduce variation into a population by changing the genome and introducing new changes that might or might not be beneficial.

It is defined as the change that is caused in terms of certain type of change that is introduced by knowingly or unknowingly.

A mutation is a change in a gene. Mutations happen when a mistake is made when a cell’s chromosomes are copied.  Suppose if a genetic codon AUG has to be inserted by the mRNA which earlier has to code for methionine and was a start codon but with time U got replaced and the new codon is made which changes the expression.

Mutations that are born are none other than insertion of some other amino acids or codon , deletion of some bases and other mutations as well which leads to the variation in the species.

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Answer:

true

Explanation:

That is the exact definition of thermocline

Answer: true

Explanation:

hope it helps

Answer:

Có rất nhiều lý do mà khóa tu là quan trọng! Chúng giúp chúng ta loại bỏ bản thân khỏi sự quen thuộc của những khuôn mẫu thông thường hoặc môi trường xung quanh, để dành thời gian để đến với Đức Chúa Trời trong sự Sáng tạo của Ngài. Thông thường ở những thời điểm khác nhau trong cuộc sống, một lý do hoặc nhu cầu này có thể vượt trội hơn lý do khác. Tuy nhiên, luôn có những lý do chính đáng, bất kể mùa nào trong đời của bạn, rằng một khóa tu là rất quan trọng để lên lịch, lập kế hoạch và tham dự. Dưới đây chỉ là bốn trong số chúng và chúng tôi nghĩ bạn có thể nghĩ ra nhiều hơn nữa!

Gần như hàng ngày, chúng tôi nhận được các cuộc gọi hoặc chuyến thăm từ những người đã đến Wafloy hơn 20, 30, 40 năm trước. Niềm vui khi trở thành một trung tâm nhập thất 72 tuổi là chúng tôi được nghe những người khác chia sẻ những kỷ niệm đó. Mối liên kết của những ký ức này không chỉ buộc họ với một nơi, mà còn với tình đồng nghiệp của những người khác đã đi cùng một hành trình. Chúng ta, con người, được tạo ra để giao tiếp với Chúa và với nhau. Dành thời gian như một nhóm, cô lập trong bầu không khí phát triển và dễ bị tổn thương có thể cho phép Đức Chúa Trời di chuyển trong cuộc sống. Điều này sẽ tạo ra những ký ức gắn kết vượt ra ngoài bản thân sự kiện khóa tu. Những ký ức đó và tác động của chúng có thể tồn tại suốt đời.

Explanation:

Answer:

because the precaution is skin shade by the patient should be burned away and not be directly test

Answer:

People suffering from chickenpox should not be in sunlight because the skin is more susceptible to heatstroke. The virus stays for a long time in the body, even after the symptoms are gone. Hence, it is recommended to burn it.

Explanation:

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Answer:

It will decrease blood pressure because the ventricles are filling with less blood between beats.

Explanation:

In ventricular tachycardia, the heart beats faster than normal, usually 100 or ... The chaotic heartbeats prevent the heart chambers from properly filling with blood. As a result, your heart may not be able to pump enough blood to your body

Answer:

It will decrease blood pressure because there is a longer rest period beats of the ventricles.

Explanation:

You can read more about Ventricular Tachycardia here: https://www.pennmedicine.org/for-patients-and-visitors/patient-information/conditions-treated-a-to-z/ventricular-tachycardia

Answer:

being invisible to a predator or prey is an advantage in the tropical rainforest

Complete question:

This Roman snail, this cuttlefish, and this mussel have similarities and

differences in their body structures. What does the information about these

structures tell you about the ancestors of these species?

a) None share an ancestor population because different species cannot share  an ancestor population. It is a coincidence that these species have some of  the same body structures.

b) The Roman snail and the cuttlefish share an ancestor population, but they  must not share an ancestor with mussels because mussels have no radula.

c) All three species share an ancestor population, but Roman snails and

cuttlefish share a more recent ancestor population. This is why they share

the radula structure.

d) We cannot make observations of ancestor populations from the past. It is

impossible to explain ancestors with only the information about the body

structures of different species.

Answer:

The correct answer is option C. All three species share an ancestor population, but Roman snails and  cuttlefish share a more recent ancestor population. This is why they share  the radula structure.

Explanation:

The three species belong to the mollusk phylum, and to the placophore group.

Each of them belongs to a different class.

The tree classes share a common ancestor from which all the placophores evolved. Among them, we can mention the monoplacophore, gasteropod, cephalopod, bivalve, and scaphopods. Three branches diverged from this common ancestor. The first one originated the monoplacophore. The second one originated the common ancestor of gastropods and cephalopods. And the third one originated the common ancestor of bivalves and scaphopods. The tree-mentioned species inherited the mantle and the radula from their foreign common ancestor. But later in time, individuals that originated bivalves lost the radulla. This is why the three species have a mantle, but only gastropods and cephalopods have a radula. When each of these classes evolved, they developed their own traits,

You will find an image in the attached files that will help you understand this explanation.      

Answer:b

Explanation:

The cell spends more time in the meiosis phase. Therefore, option "C" is correct.

Meiosis is a type of cell division in sexually reproducing organisms, therefore, producing gametes. In this process, the number of chromosomes is reduced in the gametes. These cells are known as haploid cells. The examples are sperm and ovum.

There are two phases of meiosis: meiosis I and meiosis II. Meiosis I has four stages whereas meiosis II has three stages. In meiosis I, a cell divides into two genetically distinct haploid cells. In meiosis II, the two divided haploid cells divide further in two cells. Total four cells are produced in the process of meiosis.

Meiosis is an important cell division process in sexually reproducing organisms. It is used in the production of gametes in both males and females organisms.

Therefore, meiosis take more time than mitosis due to double stages.

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Answer:

Both no

Explanation:

be because it is liquid, they don't have fix shape

Answer:

I think the correct answer from the choices listed above is option C. A way in which phosphorus may enter into the phosphorus cycle is that when human use of fertilizers release phosphorus into the groundwater. Hope this answers the question. Have a nice day.

Human use of fertilizers releases phosphorus into the groundwater is a way in which phosphorus may enter into the phosphorus cycle. Therefore, the correct statement is option C.

Phosphorus is a nutrient needed by plants to grow, and it is added to soil in the form of fertilizers. When it rains, the phosphorus is washed away from the soil and carried into nearby rivers, lakes, and groundwater.

The phosphorus is then taken up by plants or become part of the sediment at the bottom of bodies of water.

Phosphorus can be transformed from there and recycled through the different parts of the phosphorus cycle, such as weathering, erosion, and sedimentation. Phosphorus can also be released from the decomposition of organic matter.

Therefore, human use of fertilizers releases phosphorus into the groundwater is a way in which phosphorus may enter into the phosphorus cycle.

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Answer:

Food web

Explanation:

food web:

a system of interlocking and interdependent food chains.

Answer:

food web

Explanation:

food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains.

Answer:

search it up, but 6 is b

Explanation:

Answer:

matter is what makes up everything, every type of organism, every object, etc.

Explanation:

Answer: 1.

physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

"the structure and properties of matter"

2.

an affair or situation under consideration; a topic.

Explanation:

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Answer:

i.   Name each of the parts labelled I, II, III, IV and V.

                           {5 marks}

I - Crown / Enamel

II - Dentine

III - Cement / Periodontal membrane

IV - Jaw bone / Root

V - Pulp Cavity

ii   What is the function of each of the parts labelled I and III?

                    {2 marks}

I - Protects teeth from harmful bacteria

-- Enable teeth withstand pressure of chewing

-- Cutting / chewing / protects dentine / protect pulp cavity

III - hold tooth firmly (in socket / Jaw bone)

iii  Which of the labelled parts could be affected by tooth decay?

                                   {1 mark}

V - Pulp cavity

iv  State three ways by which tooth decay may be prevented.

                      {3 marks}

→ avoid using sharp-pointed objects

→ avoid having dry mouth

→ use water containing fluorides to wash teeth / mouth

→ avoid smoking

→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing

→ wash the mouth vigorously after each meal

→ regular visit to the dentist

→ avoid eating too hot foods

→ avoid eating too much sugary food

→ avoid eating too cold food / taking too cold drinks

Explanation:

Explanation:

a) p+e+n=18

mà p=e=z => 2p +n=18

câu a có thiếu dữ kiện không?

Answer:

A. A glycerol head with 3 fatty acid tails

Explanation:

One glycerol attached to 3 fatty acids each

The structure of a Triglyceride is  a glycerol head with 3 fatty acid tails. Hence the correct option is A.

The structure of a triglyceride consists of a glycerol molecule bonded to three fatty acid tails. Glycerol is a three-carbon alcohol with a hydroxyl group attached to each carbon, while fatty acids are long hydrocarbon chains with a carboxyl group at one end. Through a condensation reaction, the hydroxyl group of each glycerol molecule combines with the carboxyl group of a fatty acid, resulting in the formation of an ester bond.

This process is repeated three times, with each fatty acid binding to a different carbon of the glycerol molecule, thus forming a triglyceride. The three fatty acid tails provide energy storage and insulation properties, while the glycerol molecule serves as a backbone for their attachment. Triglycerides are the main storage form of fat in animals and plants.

Hence the correct option is A.

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Answer: 1:There are five recognized types of surface mining, each with specific variations depending on the minerals being extracted. These include strip mining, open-pit mining, mountaintop removal, dredging and highwall mining.

2:Refilled/reshaped w/vegetation planted; filled w/water to become a lake; turned into landfill; left open as home for bats or sealed off if underground.

3:Physical characteristics that make a colored stone valuable are color, clarity to a lesser extent (emeralds will always have a number of inclusions), cut, unusual optical phenomena within the stone such as color zoning (the uneven distribution of coloring within a gem) and asteria (star effects).

4:Atoms where the electrons and protons are not equal are called ions. Ions are charged particles. They can be either positively charged ions or negatively charged ions.

5:Molecule is a substance with two or more atoms bonded together such as the oxygen humans breathe (O2). Elements are pure substances made up of all the same atoms such as gold (Au), hydrogen (H), and oxygen (O). Elements all have the same number of protons in their nuclei and can't be broken down.

6:A covalent bond involves electrons being shared between atoms. The most stable state for an atom occurs when its valence electron shell is full, so atoms form covalent bonds, sharing their valence electrons, so that they achieve a more stable state by filling their valence electron shell.

7:A crystal or crystalline solid is a solid material whose constituents are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

8:How does the native elements mineral group differ from all of the other mineral groups? Native elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable.

9:How does the native elements mineral group differ from all of the other mineral groups? Native elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable.

10:Cleavage. The way in which a mineral breaks along smooth flat planes is called cleavage. These breaks occur along planes of weakness in the mineral's structure. However, if a mineral breaks along an irregular surface, it does not have cleavage.

11: I would use fluorite to test the hardness because apatite has a higher hardness then fluorite does mean that the unknow mineral is lower on the hardness test then both apatite and feldspar. 5. Why is streak more reliable than color when identifying a mineral?

12:magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.

13:In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation.

Explanation:

Answer:

Some plants, such as roses, have thorns on their stems or branches. These act as A. To stop animals from eating the stems.

A. To stop animals from eating the stems

The potato can make you feel at home in any part of the world. According to the International Potato Center, the potato is the third most grown crop in the world, with more than 300 million metric tons produced annually. The United Nations declared 2008 as the International Year of the Potato because of its importance in feeding the poor and hungry. If not deep-fried and loaded with butter or cheese, potatoes have a lot to offer nutritionally, and they are easy to digest as well.

Salivary amylase, an enzyme secreted with the saliva, acts at the long polysaccharide units that make up starch, to shape disaccharides known as maltose. The action of salivary amylase keeps until the potato reaches the belly.

The belly empties the chyme containing the damaged egg pieces into the small intestine, where the general public of protein digestion occurs. The pancreas secretes digestive juice that consists of extra enzymes that in addition smash down the protein fragments.

Digestive enzymes play a key position in breaking down the meals you eat. those proteins accelerate chemical reactions that turn vitamins into substances that your digestive tract can take in. Your saliva has digestive enzymes in it. Some of your organs, consisting of your pancreas, gallbladder, and liver, additionally release them.

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Answer:

b is most likely to be the answer

Explanation:

Answer:

1.Blood pressure can be defined as the pressure of blood on the walls of the arteries as it circulates through the body. Blood pressure is highest as its leaves the heart through the aorta and gradually decreases as it enters smaller and smaller blood vessels (arteries, arterioles, and capillaries).

2. The more rounded the lumen, the less surface area the blood encounters, and the less resistance the vessel offers. Vasoconstriction increases pressure within a vein as it does in an artery, but in veins, the increased pressure increases flow.

Small intestine in the form of a thick paste called chyme. When the inner walls of the intestine are thrown into millions of processes called villi. The muscle layers of the small intestine are thinner than those of the stomach.

Explanation:

a sequence of three nucleotides which together form a unit of genetic code in a DNA or RNA molecule.

Answer:

Condon is a city in, and the seat of, Gilliam County, in the U.S. state of Oregon. The population was 682 at the 2010 census. The city, with an historic main street along Oregon Route 19, is a farming and ranching community.

A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis. DNA and RNA molecules are written in a language of four nucleotides; meanwhile, the language of proteins includes 20 amino acids.

The second one is most likely to be correct

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Answer:

it helps digest the food and push the food down the gut track

Explanation:

Answer:

A is the eyepiece (or ocular lens),  B is the objective lenses, C is the iris diaphragm, D part is refers to light condenser, E is the location of fine adjustment knob and F is the location of coarse adjustment knob.

Explanation:

A is the eyepiece (or ocular lens),  B is the objective lenses, C is the iris diaphragm, D part is refers to light condenser, E is the location of fine adjustment knob and F is the location of coarse adjustment knob. All these parts are the important parts of microscope which has a specific function in the microscope. Without one of these parts, we can not see the microbes in the microscope.