Approximately, when was the structure of DNA first described?
1900
1950
1800
1850

D. 99% of all living things that have ever existed are now extinct

Answer:

The correct answer option is d. 99 percent.

Explanation:

Extinction is the term used for the termination of any organism or of a group of organisms which are commonly called as species.

Death of organisms or a species results in their extinction. Out of all over five billion species that have ever existed on the earth, about 99 percent have already gone extinct.

While the current number of species that exist on earth have reduced to a range of 10 million to 12 million.

i think that the answer is A.

Answer:

probably a parasite yw

Explanation:

Answer:

parasite

Explanation:

Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. ... They are similar to obligate intracellular parasites as they lack the means for self-reproduction outside a host cell, but unlike parasites, viruses are generally not considered to be true living organisms.

Answer:

The Moon is continually moving on ahead in its orbit while the Earth rotates. ... Because the Moon has moved 13 degrees or so since its last moonrise, it's going to take another hour or so for the Earth to catch back up to the Moon's new location, delaying the Moon's rising above your horizons by ~50 minutes each day.

- Forbeshttps://www.forbes.com › astroquizzical-moon-rise-time

Answer:

I think its D on USAtestprep

Explanation:

Answer:

yes

Explanation:

currents of rivers do shape it. it erodes at the sides making it wider and different shapes.

Answer:

Tationia Rolon

Explanation: The primary group is the first and the highest on the food chain like a Hawk and then the secondary group is the group that comes after the primaries like a mouse

Answer:

HHS stands for Heath and human services.

Explanation:

Department of Health & Human Services (HHS), also known as the Health Department. It is a cabinet-level department in U.S. People working in the helping departments should not impose their own values on the client.

Value imposition is a type of boundary violation that can interfere with clients's progress in treatment as well as their right to self-determination.  

If these workers will not be careful and aware, their values can present some difficulties and significantly affect their work with clients.

HHS workers should not impose their own values on clients because its an attempt to exert direct influence over their beliefs, feelings, judgments, attitudes and behaviors.

Answer:

B: 100

Explanation:

Carrying capacity is the point where a population stops growing and stays stable.

Answer:

B:100

Explanation:

Carrying capacity refers to the maximum number of members of a population that a particular environment can sustain for survival. In any ecosystem, the basic resources that organisms need for survival are always in limited supply. Examples include food, water, sunlight, oxygen, and shelter.

As a growing population reaches the limits of the available resources in an environment, its size levels off to "match" the amount of resources available. In doing so, the population reaches its carrying capacity.

In this example, the population of eastern cottontail rabbits levels off at around 100 individuals.

Answer:

depends nut mostly B

Explanation:

Nutrition. Living things take in materials from their surroundings that they use for growth or to provide energy. ...

2 Respiration. ...

3 Movement. ...

4 Excretion. ...

5 Growth.

6 Reproduction. ...

7 Sensitivity.

1.General characteristics of animals include :

Animal cell lacks cell wall.

Dorsal cords are present in chordates only, hence can not be included in general characteristics of animals.

2.According to comparative morphology, homologous structures are inherited from a common ancestor.

It is a well defined phenomenon - Homology.

3.Species with low genetic diversity are at a higher risk for extinction than species with high genetic diversity.

Because lower genetic variation depresses individual fitness, resistance to disease and parasites, adaptability to the changing environment.

hence they are at higher risk for extinction.

4. Mushrooms are heterotrophic organisms in the Fungi kingdom. Mushrooms are eukaryotes.

Fungi are eukaryotes as they contain membrane -bound nucleus.

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styx/ Kerberos/ nix/hydra/charon

charon/nix/styx/hydra/kerberos

Answer:

Option B, United States

Explanation:

In the stage 4 of a demographic model the rates of both birth and death are low. Therefore, the growth of population is stabilized. This situation arises because of the following factors –

a) High education  

b) Strong and stable economy

c) Better health conditions

d) Increased rate of migration of people from villages to cities

e) Better employment opportunities

Hence, United states is the best option among all

Answer:

maybe c

Explanation:

I hope this helps

Answer:

The correct answer is option C. the evidence is not related to the hypothesis.

Explanation:

The given experiment is not related to the hypothesis as the hypothesis is that with the increase in the height the speed of traveling of ball increases due to gravity. According to the hypothesis the gravity has more time to speed the ball.

The given experiment has no independent variable that can explain or test the effect of gravity on the balls because both balls dropped from the same height.

Thus, the correct answer is option C. the evidence is not related to the hypothesis.

Answer:

The correct answer would be fluorinated compounds and HFCs.

Explanation:

Chlorofluorocarbons or CFCs are halocarbons that contain molecules of chlorine, fluorine, and carbon. These chemicals were heavily used in sprays, packaging materials and refrigerators. CFCs cause depletion in stratospheric ozone.

Due of their harmful effects on ozone layer, chlorofluorocarbons have been banned since 1996.  After the banning of chlorofluorocarbons, hydroflurocarbons (HFCs) and fluorinated compounds are in used in place of CFCs as they do not deplete stratospheric ozone as much CFCs does, and do not contain chlorine.

Thus, the correct answer would be fluorinated compounds.

Chlorofluorocarbons (CFCs) were replaced by hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) after they were banned due to their harmful effects on the ozone layer. These replacements are still used in aerosols and refrigerants but are less damaging to the ozone.

After the ban on chlorofluorocarbons (CFCs) due to their damaging effects on the stratospheric ozone layer, hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) have been widely adopted as replacements. These chemicals were still used as aerosol propellants and refrigerants, like CFCs, but were designed to be less harmful to the ozone layer. HCFCs and HFCs, although better for the ozone layer, still hold global warming potential and contribute to the broader issue of climate change. Consequently, there is ongoing research and development to find alternative chemicals that have minimal environmental impacts.

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Glucose is created, then the energy gained is transferred to the energy molecule describes properly a step involved in cellular respiration. Thus, the correct option is A.

Cellular respiration is a process which occurs in the mitochondria of cell that results into formation of ATP molecules. It is divided into three main processes which are Glycolysis, Citric acid cycle, and electron transport chain alongside carbon dioxide and water from the oxidation of the energy molecule.

The energy molecule in this context is Glucose molecule. Upon oxidation, carbon dioxide molecule and oxygen are produced alongside energy in the form of ATP (adenosine triphosphate).

Therefore, the correct option is A.

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Final answer:

Option B correctly describes a step in cellular respiration, where carbon dioxide and water are produced and energy is transferred to ATP. This is part of a multistep process that includes glycolysis, oxidation of pyruvate, the Krebs cycle, and the electron transport chain.

Explanation:

The correct description that properly describes a step involved in cellular respiration is option B. Carbon dioxide and water are released after the energy molecule is charged. In the process of cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and during this process, the energy previously stored in glucose is transferred to ATP (adenosine triphosphate). ATP is the molecule that cells use to perform work, such as contracting muscles.

Cellular respiration can be broken down into several key stages:

Oxidation of pyruvate to Acetyl CoA.

The Krebs cycle, which takes place in the mitochondria and fully oxidizes Acetyl CoA into carbon dioxide.

Electrons from food are moved down the electron transport chain in the mitochondria's inner membrane, leading to the phosphorylation of AMP to produce ATP.

Thus, glucose plus oxygen yield carbon dioxide and water, and the energy released during this reaction is captured in the form of ATP, which is used by the cell.

Answer:

D. It would grow until it had to compete for food

Explanation:

I got it right

The population would grow until it had to complete for food. Thus correct option is D.

Population is the inhabitants of a particular area,  town, or country.

Thomas Malthus was an economist and demographer known for his theory that growth in population will always prone to outrun the food supply and that betterment of humankind is impractical without strict limits on reproduction.

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Answer: Humans started to take more and more fish as technology improved, and this caused the fish population to decline drastically.

By using the graph above, you can say that the population of fish from 1850 to 1960 remains more or less stable, then after 1960 to 1970, it increases very rapidly due to enough resources. Then from 1970 to 1992, it awfully declines due to human activity.

A Population may be defined as the number of individuals of the same species living in a particular area at a given time.

Due to the advancement in technology, the activity of fishing becomes easy and more productive after 1970. It leads to the rapid decline in the population of fish.

Therefore, it is well described above.

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How I remember what goes with what with DNA is the little acronym thingy:

Apple Tree

Go Car

^^This helps me remember that A goes w/ T and vise versa, and G goes with C and vise versa

Hope this helped! Let me know if there is anything I need to clarify or explain more in depth!

TACCATCGATTGGAA and maybe find a strategy to help you remember

Answer:mitosis if i am wrong i beg forgiveness i have moved on way past this area

The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis.

Answer:

Pistil: divides into three parts

Stamen: the male part

Sepal: green like covers

Petals: colorful part

Receptacle: connects stem to flower

Explanation:

Flowers are a main and specialized part that plants have, this is because they are responsible for carrying out the process of sexual reproduction, from which the seeds that will give life to the new era of plants of the same species Some of its parts are as follows:

-Peduncle

-Receptacle

-Perianto

-Carpel

-Pistil

-Gineceo

-Androecium

-Petals

The SEC dictates how volume is counted. Thus, volume is counted in the same manner on all markets based on the above reporting structure. Any time money changes hands (or any time capital is risked), it must be counted as a trade. Examples: 1) One registered market participant on Nasdaq buys 100 shares into inventory from another registered market participant or from one of its clients. In either case, it is counted as 100 shares. 2) One member firm on the NYSE or Amex buys 100 shares from another member firm. The Specialist matches the order between the two firms and it is counted as 100 shares. 3)The Specialist sells 100 shares from his inventory to a member firm on the NYSE. It is counted as 100 shares. 4) A Market Maker receives an order to buy 100 shares from it's client. It does not have 100 shares in its inventory. It must go buy 100 shares from someone else. It then sells these 100 shares to the client. Thus, there are two trades in this example for a total of 200 shares.

hope this helps (:

Answer:

The oxygen circulates in your body, gets used up, and carbon dioxide is the result. The carbon dioxide then travels with your blood back to your lungs and is diffused to the alveoli, where it is exhaled.

Hope This Helps!    Have A Nice Day!!

The oxygen circulates in your body, gets used up, and carbon dioxide is the result. The carbon dioxide then travels with your blood back to your lungs and is diffused to the alveoli, where it is exhaled.

Carbon dioxide is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature.

Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth's temperature, make up the food that sustains us, and provide energy that fuels our global economy. Most of Earth's carbon is stored in rocks and sediments.

CO2 plays various roles in the human body including regulation of blood pH, respiratory drive, and affinity of hemoglobin for oxygen (O2). Fluctuations in CO2 levels are highly regulated and can cause disturbances in the human body if normal levels are not maintained.

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Answer:

Rock particles can become pollutants by/from the wind. That is called erosion.

They can also become pollutants from man-made tools. For example a tool the polishes rocks releases all the dust and powder substance from the rock into the atmosphere.

There are also minute volcanic which are rock fragments formed during explosive shattering of sticky magma.

Answer:

The answer would be RNA.

Explanation:

The process of converting the genetic message from DNA into RNA is called Transcription.

Transcription itself is the written version of something. It could be any information. In this case, the information about the genetics from DNA is converted to RNA. RNA is a new molecule of messenger. Message is copied by the RNA enzyme called polymerase. In this process, there are three types of RNA that participate and play different roles.

All animals cannot make their own food, they are consumer

Answer:

All animals are eukaryotic.

Explanation:

Attacked by ones own immune system

Each codon is made up of 3 nucleotides and all codons except the end codons code for one amino acid.

So 30/3=10 codons which code for a peptide with 9 amino acid monomers.

Hope this helps:))

Final answer:

A gene with 30 DNA nucleotides will code for a polypeptide containing 10 amino acids, assuming all nucleotides are part of codons that result in amino acids and do not include a stop codon.

Explanation:

To determine how many amino acid monomers will be present in the completed polypeptide from a gene with 30 DNA nucleotides, one must consider the genetic code. The genetic code is a set of rules used by living cells to translate information encoded within genetic material (DNA or mRNA sequences) into proteins. It is established that a sequence of three nucleotides, known as a codon, codes for a single amino acid.

Based on the information in the question:

Firstly, divide the total number of DNA nucleotides by three to get the number of codons (30 DNA nucleotides / 3 nucleotides per codon).

This equals 10 codons in the gene sequence.

As each codon translates to one amino acid, there will be 10 amino acids in the completed polypeptide chain.

Note that this calculation assumes the absence of a stop codon within these 30 nucleotides, as a stop codon would terminate translation early.

Thunderstorms typically form on warm days because the warm air over the Earth's surface rises, causing water vapor to condense and form clouds which release latent heat, reinforcing and accelerating the cloud's development into a thunderstorm. Hence the correct option is A.

Thunderstorms usually form on warm days because warm air rises rapidly, creating strong updrafts necessary for thunderstorm development. When this warm, humid air rises, it cools and its water vapor condenses forming thunderheads or cumulonimbus clouds. This condensation releases latent heat, which further drives the air upwards in a positive feedback loop, creating the conditions ideal for thunderstorms. The warm air over the Earth's surface rises and pushes the clouds higher, facilitating the development of thunderstorms. This process involves the combination of phase change and convection, where heat from the sun causes water to evaporate, and this water vapor rises. As it condenses higher in the cooler atmosphere, energy is released, causing the air to expand and rise even further.

Answer:

A sporophyte  is the diploid multicellular stage in the life cycle of a plant or alga. It develops from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell therefore has a double set of chromosomes, one set from each parent.

Final answer:

The sporophyte is the diploid stage of the plant life cycle that produces haploid spores through meiosis, which then grows into the gametophyte generation. This stage is more prominent in vascular and seed plants compared to non-vascular plants.

Explanation:

A sporophyte is the multicellular, diploid phase of the plant life cycle which is involved in the process of alternation of generations. To clarify, plants alternate between two main stages: the gametophyte (haploid) stage and the sporophyte (diploid) stage. The sporophyte arises from the fertilized gamete and is characterized by having two sets of chromosomes, one from each parent. This stage of the plant produces spores by a process called meiosis, wherein the chromosome number is halved, leading to the formation of haploid spores. These spores then grow, by mitosis, into a new gametophyte (haploid) generation.

Geotropism or gravitrotropism