Answer:
Like all echinoderms, sea cucumbers possess both a water vascular system that provides hydraulic pressure to the tentacles and tube feet, allowing them to move, and a haemal system.
Answer: They are soft bodied and their leathery skin lack spines. They also have wart type things on their body.
Explanation:
What is the correct order of genetic material from smallest to largest?
allele, gene, DNA, chromosome, nucleus
DNA, gene, allele, chromosome, nucleus
nucleus, chromosome, DNA, gene, allele
Answer: allele, gene, DNA, chromosome, nucleus
Explanation: An allele is a variant of a gene or a different form of a gene. A gene is a segment of a DNA that codes for an RNA or a protein. A DNA is a genetic material that contains all the genetic information of an organism. A DNA is packaged and condensed into a threadlike material known as chromosome and chromosomes are found in the nucleus of a cell.
Answer:
the first one
Explanation:
What happens during the light reaction of photosynthesis?
Air and water create energy for a plant.
Water molecules split apart.
Water molecules combine to make food.
Carbon dioxide is combined with glucose.
♡ The Question ♡
-What happens during the light reaction of photosynthesis?
* ୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Answer ♡
-Water molecules split apart.
*୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Explanation/Step-By-Step ♡
-No Explanation/Step-By-Step provided!
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♡ Tips ♡
-No Tips provided!
7. What patterns do you see in the DNA molecule?
Answer:
Each base pair is formed from two complementary nucleotides (purine with pyrimidine) bound together by hydrogen bonds. The base pairs in DNA are adenine with thymine and cytosine with guanine. DNA has a spiral staircase-like structure.
Explanation:
DNA molecule is a double helix, having four base pairs, that is adenine, guanine, thymine, and cytosine. Adenine pairs with thymine, and cytosine pairs with guanine.
• The discovery of DNA was done by Watson and Crick.
• DNA exhibits two strands or sides, and these strands are present in the form of a twisted ladder, giving it a look of a double helix.
• In the ladder, the sides constitute the sugar-phosphate parts of adjacent nucleotides bonded together.
• Covalent bonding is found between the phosphate of one nucleotide and the sugar of the next nucleotide.
• Between the phosphates, the hydrogen bonds make the strand of the DNA twist.
• The nitrogenous bases on the ladder are pointed inward and form pairs with the bases present on the other side.
• The complementary pairing of the bases is done, that is, purine pairs with pyrimidines with the help of hydrogen bonds.
• Pairing is done between adenine and thymine and between cytosine and guanine.
Thus, DNA is a double helical molecule having complementary base pairing, that is, purines with pyrimidines.
To know more about:
https://brainly.com/question/1620021
1.
A moon on the opposite side of the sun is called a ______ moon.
full
new
2.
Sun directly behind the moon is called a ________ moon.
full
new
3.
A moon that is more than half full is called a _______ moon.
gibbous
new
A moon on the opposite side of the sun is called a full moon. Sun directly behind the moon is called a new moon. A moon that is more than half full is called a gibbous moon. Thus, the correct options for 1, 2, and 3 are A, B, and A, respectively.
What are the phases of Moon?A moon phase is the shape of moon's sunlit portion as seen from the Earth. There are a total of eight different phases of moon which are new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, and waning crescent. These phases repeat in the cycle after every 29.5 days.
A moon on the opposite side of the Sun is called a full moon. Sun directly behind the moon is a new moon. A moon that is more than half full is called a gibbous moon.
Therefore, the correct options for 1, 2, and 3 are A, B, and A, respectively.
Learn more about Moon here:
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100 POINTS IF YOU CAN ANSWER ALL QUESTIONS!! PLUS BRAINLIEST, THANKS, RATINGS, ETC
1. The Sun, like 80 to 90 percent of stars, is in which stage of life?
A. main sequence
B. stellar formation
C. red giant
D. dying star
2. How do scientists learn about the age of the solar system and its planetary bodies? Select the two correct answers.
A. using radiometric dating of meteorites
B. comparing the composition of the gaseous planets to the rocky planets
C. analyzing impact craters on planetary body surfaces
D. measuring distances between planets
3. Which describe the study of spectroscopy? Select the two correct answers.
a. the number of galaxies
b. interaction of light and atoms
c. emission and absorption of light
d. reflection of light by Earth
4. Which state of matter best describes the elements inside stars?
a. plasma
b. liquid
c. solid
d. gas
5. Which are examples of non-visible light?
a. white light from the sun and microwaves
b. radio waves and ultraviolet light
c. white light from a lightbulb and rainbows
d. rainbows and X-rays
6. Which is the first stage in the life cycle of a massive star?
a. black hole
b. white drawf
c. red giant
d. nebula
7. Which of these is a heavy element in a star?
a. carbon
b. hydrogen
c. lithium
d. helium
8. Why are spectral lines useful in classifying stars?
a. They show the layers that make up a star.
b. They show a star's location.
c. They indicate a star's age.
d. They show the composition of a star.
9. Which statement correctly explains how the Hertzsprung-Russell diagram helps to compare stars?
a. The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
b. Stars with the highest temperatures appear towards the right side of the Hertzsprung-Russell diagram.
c. The Sun's high temperature places it to the far left of the Hertzsprung-Russell diagram.
d. The Hertzsprung-Russell diagram plots stars according to their size and shape.
*U*
Explanation:
1. main sequence
2. using radiometric dating of meteorites; analyzing impact craters on planetary body surfaces
3. interaction of light and atoms; emission and absorption
4. plasma
5. radio waves and ultraviolet light
6. nebula
7. carbon
8. They show the composition of a star
9. The Hertzsprung-Russell diagram plots starts according to their luminosity and temperature, which is also associated with spectral class.
OptionA) The Sun is in the main sequence stage. Option A) and C) Radiometric dating of meteorites and analyzing impact craters help determine the solar system's age. Option B) and C) Spectroscopy studies the interaction and emission/absorption of light. Option A) plasma best describes the elements inside stars. Option B) Radio waves and ultraviolet light are non visible. First stage in the life cycle of a massive star is D) nebula. A) Carbon is a heavy element in a star. Option D) spectral lines show the composition of a star. Statement A correctly explains how the Hertzsprung-Russell diagram
Here are the answers to the questions you asked:
The Sun, like 80 to 90 percent of stars, is in which stage of life?
after completing the respiration and fermentation lab activity, your friend decides they want to know more about what factors affect respiratory rates. they learn how easy it is to construct a respirometer (a device that measure o2 consumption) and decide to build one for use with mice. it just so happens that you have dozens of pet mice and decide to help them with the experiments. of course, the procedure does not negatively impact the mice in any way.
Final answer:
To measure the rate of respiration in mice with a respirometer, factors such as temperature and the complexity of the respiratory system must be considered. CO2 produced during respiration should be absorbed by a substance like NaOH or KOH for accurate measurements. The brain's response to stimuli regulates respiratory rate and depth.
Explanation:
Factors Influencing Respiratory Rates in Mice
To accurately measure the rate of respiration in mice using a respirometer, it is crucial to consider and control various factors. The respirometer is a device designed to measure oxygen consumption, which is a direct indicator of the respiratory rate of an organism. Since the respirometer measures changes in gas volume, to account for the production of carbon dioxide as oxygen is consumed, a substance such as sodium hydroxide (NaOH) or potassium hydroxide (KOH) can be included in the setup to absorb the CO2 produced.
Variables that can affect respiratory rates include temperature, animal size, and the complexity of their respiratory systems. For instance, at different temperatures, the metabolism and thus the respiratory rate can change, as seen in the experiment comparing mice at 10°C and 25°C. The medulla oblongata and pons in the brain regulate the respiratory rate and depth of breathing in response to systemic stimuli, adjusting ventilation as needed.
All aerobic organisms, including mice, require oxygen for cellular respiration and production of adenosine triphosphate (ATP), the energy currency of the cell. This process is fundamental for maintaining the life processes of the organism. Aerobic respiration is also related to exercise and various activities in humans, where measuring oxygen use can indicate energy consumption.
how do basic trends in hominid evolution from early ancestors to modern human support the theory of evolution?
The basic trends in hominid evolution were terrestrial evolution, large brain, bipedalism, inclusion of meat protein in diet and civilization. These traits evolved over the time and found in modern human.
Explanation:
Hominid evolution is the trend of evolution from ancestors to modern human involving the five steps these are terrestrial evolution, large brain, bipedalism, inclusion of meat protein in diet and civilization.
Evolution is the term used for changes in characteristic features for natural selection or better survival and adaptation to the environment. The human share 99% of genetic sequence with chimpanzee, making the closer evolutionary relationship.
Evolutionary trend is a change in traits or character which results in significant change with time.
The idea of cooking the meat on fire is an example of increase brain size and evolution.
The evidences of bipedal locomotion was seen in several categories of early man studied in fossils show evolution in locomotion.
Bipedal locomotion is an example of transition of life from arboreal to terrestrial life hence terrestrial evolution.
The use of tools came in to existence leading to civilization and increase brain size.
The large energy requirement of brain tissue with increase in brain size meat was opted for fuelling the protein source.
This hypothesis states that viruses originated from more complex cells
Select one:
Answer:
The hypothesis that states that viruses originated from more complex cells is called the regressive hypothesis.
Explanation:
The regressive hypothesis -also called degenerative hypothesis- raises the possibility that viruses originally were cells that behaved as symbionts or parasites of other cells, and this condition of dependence could have originated the disappearance of genes, becoming structures formed by nucleic acid inside a viral capsid (virus).
Some evidence gathered to support this theory suggests that some bacteria, such as rickettsia, need to parasitize a cell in order to replicate, just as viruses do.
Learn more:
Virus characteristics https://brainly.com/question/3122852
What part of the respiratory system do you think is most important? Provide a thorough explanation to support your answer.
Answer:
The most important are the lungs, more precisely the alveoli.
Explanation:
Alveoli are structures of the lungs where gas exchange occurs. They allow oxygen from the air to pass into blood. Oxygen diffuses through the walls of alveoli into the capillaries that surround it. Oxygen is then bonded with the iron in red blood cells and travels to the heart. The heart then sends the oxygenated blood out to all the cells in the body.
The full classification of human beings is as follows: Animalia,
Chordata, Mammalia, Primates, Hominidae, Homo, Homo
Sapiens.
Based on the above, enter the name of the order to which
humans belong.
Final answer:
Humans belong to the order Primates, within the class Mammalia in biological taxonomy, characterized by advanced traits shared among primates.
Explanation:
In the classification of human beings, humans are categorized under the order Primates. This classification falls within the hierarchy of biological taxonomy and aligns under the class Mammalia. Humans share distinctive primate features such as five digits with nails, opposable thumbs, advanced vision, a large brain, high intelligence, complex behaviors, and the propensity to live in social groups. These traits are shared among primates and are often adaptations to living in trees, although humans have largely moved to a terrestrial lifestyle.
Products that were made in the light reactions of photosynthesis, but are required by the
dark reactions
are ____ and ____
- oxygen and ATP
- oxygen and water
- oxygen and NADPH
- ATP and NADPH
Answer: ATP and NADPH
Explanation: Photosynthesis in higher plants involves two processes: light reactions which occurs only when plants are illuminated and carbon fixation reactions which are driven by products of light reactions.
In light reactions, chlorophyll and other pigments absorb light and conserve it as ATP and NADPH while oxygen is liberated but in carbon fixation reactions, ATP and NADPH are used to reduce carbon dioxide to form triose phosphates, starch, sucrose and other products derived from them.
Kevin did not take biology or physical science in high school which means that he cannot pursue a career pathway and health and science
true or false
Which of the following best describes how mRNA is produced? A. RNA provides a template for rna polymerase. B. Rna polymerase provides a template for dna
Final answer:
The correct option is A. DNA provides a template for RNA polymerase. mRNA is produced from DNA through the process of transcription, where RNA polymerase uses one strand of DNA as a template.
Explanation:
The production of mRNA (messenger RNA) from DNA is a process called transcription. This critical step in gene expression involves the enzyme RNA polymerase, which uses one strand of DNA as a template to synthesize a complementary RNA strand. During this process, RNA polymerase unwinds the DNA and reads the template strand from the 3' to 5' direction, pairing each DNA nucleotide with its RNA complement, but substitutes uracil (U) for thymine (T). The correct answer to the question is A. DNA provides a template for RNA polymerase.
Answer:
DNA provides the template for RNA polymerase.
Explanation:
I took the quiz, and it can be generally guessed at because DNA makes RNA which makes proteins so if you see that on your questions it should be that.
Can I get some help please.
Answer:
D would be the outcome of natural disaster
Explanation:
The growth of the plants reset
The parts of a chromosome are labeled. The top, shorter portion is labeled a.
Which is indicated by the letter a?
petit arm
queue arm
centromere
gene
.answer:
petit arm
explanation:
all human chromosomes have 2 arms, the p (short) arm and the q (long) arm. they are separated from each other only by a primary constriction, the centromere, the point at which the chromosome is attached to the spindle during cell division.
the symbol "p" stands for "petit", small in French, while "q" was chosen merely because it was the next letter in the alphabet.
Answer:
It should be the petit arm.
Explanation:
You have to know about science to figure this out. Here is why, if you look at the image one of the arms is longer than the other. This is the q(long) arm. The smaller one is the P(small) arm. Petit is french meaning small. the part wher they meet in the middle be the centromere. you can remember this because it is in "center". the lines on it are genes. why? because this is the only answer left ;) hope this helped
Explain how energy impacts the quality of life for individuals and society.
Answer:
The increasing demand of energy affects the quality of life.
The more the use of energy, the more reliable and easier the life will be for an individual. A society which has more usage if energy will be more developed.
If energy, such as light, is not present in a society than the individuals will have trouble and will not be able to live a more simpler life.
The quality of life is greatly impacted by the amount of energy that is used by each individual as well as each society.
Final answer:
Energy availability greatly influences the quality of life, enabling convenience and economic growth in energy-rich societies while posing environmental, health, and social challenges. In contrast, energy-poor regions struggle with economic development and achieving a basic quality of life. Addressing these disparities and impacts is essential for a sustainable global future.
Explanation:
Energy profoundly impacts the quality of life for individuals and society as a whole, serving as a foundational element in modern civilization. Abundant energy availability enables the technological advancements and conveniences that characterize high standards of living in industrialized nations. However, energy production and consumption also have significant environmental, social, and political implications.
For societies in industrialized countries, energy consumption facilitates economic prosperity, powers a myriad of appliances that simplify daily chores, and supports systems that promote health and well-being. Yet, this energy-rich lifestyle is not without consequences. The extraction and usage of energy resources, including fossil fuels and nuclear power, can lead to environmental degradation, health hazards from pollution, and complex socio-political challenges such as civil unrest and global conflict over energy supplies. Renewable energy sources offer some solutions but also come with their own environmental and economic costs.
On the other hand, energy-poor regions face significant challenges. Lack of access to reliable energy sources limits economic growth, exacerbates poverty, and constrains the basic quality of life. Efforts to provide sustainable, affordable, and clean energy solutions are crucial for improving living conditions and promoting social equity worldwide.
Why a cell cannot just keep growing
Answer:
A cell cannot just keep growing because the part of the inner portion of the cell grow quickly as compared to outer side of the cell i. e. cell membrane. So we can say that cell membrane is the limited factor which doesn't allow cell to grow bigger in size. The growth of organisms increases not because of cell size increases, it is due to the number of cell increase because of cell division.
How many arms does a octopus have
Answer:
8
Explanation:
beacue they are just like that
Answer:
6 arms
Explanation:
23. Fossils are rare because:
a. Only certain parts of organisms can fossilize
b. Very few organisms have died
c. They are only found in North America
d. Fossils are very common, silly
What is the difference
between self-pollination
and cross-pollination?
Explanation:
Cross pollination is the transfer of pollen grains from the anther of a flower to the stigma of a flower of a different plant of the same species.
Self pollination is the transfer of pollen grains from the anther to the stigma of the same flower
Self-pollination includes dust from a similar plant while cross-pollination includes various plants. Cross-fertilization prompts higher hereditary variety, making it more worthwhile.
When pollen from the anther is deposited on the stigma of the same flower or another flower on the same plant, self-pollination occurs. When the stamen and carpel of a flower mature simultaneously and are positioned so that pollen can easily land on the stigma, this method is common. Conversely, cross-fertilization includes the exchange of dust from the anther of one bloom to the disgrace of a blossom on an alternate person of similar species. This cycle advances more prominent quality assortment on the grounds that the hereditary material comes from two unique plants.Both methods of pollination have played a crucial role in agriculture.
Choose the answer.
Herbie was in a terrible car accident and sustained head injuries. He is able to speak
but nothing he hears makes any sense to him. He can see people talking but it is all
jumbled. Which of these structures was probably injured in his accident?
O Broca's area
Wernicke's area
the hippocampus
the hypothalamus
Question 3 (2 points)
Wernicke's area was probably injured in his accident.
Option: B
Explanation:
The Wernicke area is the brain region which is required for the development of languages. It is situated in the temporal lobe on the left side of the brain and is essential for speech comprehension, whereas the region of Broca is connected to speech output.
The area is situated in the cerebral hemisphere's left portion generally near posterior region of the Superior Temporal Gyrus (STG).The brain's section named as lateral sulcus where the gathering of temporal lobe and parietal lobe take place in the auditory cortex, is covered in this zonal area.
What happens to the frequency if the period were to change from o.2 seconds to 0.5 seconds
Answer:
The Hz would change
Explanation:
For example, a wave with a time period of 2 seconds has a frequency of 1 ÷ 2 = 0.5 Hz.
What is a function of a white blood cell
Answer:
To defend the body against diesease
Explanation:
Answer:
White blood cells protect the body against infection by bacteria and viruses.
Explanation:
White blood cells are part of the immune system that protects your body from infection. These cells circulate through your bloodstream and tissues and respond to injuries and illnesses by attacking unknown organisms that enter your body.
Why do scientists use Latin for the scientific names of organisms
Answer:
Scientist use Latin language for naming and classification because it is an ancient language and is not spoken in any region of the world also doing this reduces the chance of conflict between countries over using their native languages as base of classification which would be very unhealthy for a growing scientific environment.
Explanation:
Suppose Dylan marries woman with type O blood. Is it possible for any of their
children to also here? Why or why not?
Which term would be directly related to the science of ecology?
population density
circulatory system
genetics
taxonomy
last one i think?
Answer: population density
Explanation:
Yes! all because ecology seeks to understand the relationship between living organisms (plants, animals, microorganisms) and their environment while population density refers to the number of individual organisms in a unit area of space.
That is, Population density = Total population ➗ Area of habitat
Thus, population density is related and also a subset of ecology.
Withdrawing too much water from an aquifer can cause several issues, including ___?
Answer:
land subsidence,sinkholes,freshwater contamination and having to dig deeper and deeper irrigation wells
What happens when fertilization occurs?
Answer:
What happens when fertilization occurs?
When fertilization occurs, zygote is produced as a result of this which led to transfer of genetic traits to the zygote inherited from the parents
Explanation:
Which of the following adaptations is best suited for life in the pelagic zone?
•tubelike body shape
•gas-filled bag or swim bladder
•hard shell
•numerous legs
Answer:
Gas filled bag or swim bladder l
Explanation:
Answer:Gas filled bag or swim bladder
Explanation:
I’m smart
Which best describes a chemical oxidation?
the loss of electrons,
the loss of one proton,
the gain of electrons,
or reaction with oxygen gas
Chemical oxidation best describes the loss of electrons from a substance, indicating an increase in oxidation state, which can occur with or without the involvement of oxygen gas.
Explanation:The most accurate description of chemical oxidation is the loss of electrons from a substance. This can occur with or without the reaction involving oxygen gas. Oxidation is a process that deals with the transfer of electrons between chemicals, leading to an increase in the oxidation state of the element being oxidized. A simple example of oxidation can be seen when a metal like iron reacts with oxygen to form iron oxide (rust), where the iron atoms lose electrons to the oxygen atoms.
In organic chemistry, oxidation can also be characterized by an increase in oxygen or a decrease in hydrogen in a molecule. These changes in electron density or chemical bonds can affect the properties and reactivity of the substance. For example, ethanol (C2H5OH) can be oxidized to form acetic acid (CH3COOH), with the addition of an oxygen atom and the loss of hydrogen atoms.