Answer:
Oxaloacetate
Explanation:
Throughout the citric acid cycle, in the matrix of the mitochondria, the 4 carbon molecule is transformed (through the addition and removal of carbon atoms) and ultimately regenerated before the beginning of another cycle. During this transformation of oxaloacetate, some intermediate products are of a lower energy level than their predecessors hence making the process energetically favorable. The energy difference is capture is energy molecules such as NADH. FADH₂, and ATP.
If you find a rock that has both a nautilus and a goniatite fossil, about hold is the rock? How do you know?
(This is some information within the lesson)
Nautilus: 410 million years ago - present day
Goniatite: 360 - 290 million years ago.
Answer:
The rock will be old between 360 and 290 million years
Explanation:
If we have fossils from both nautilus and goniatite in the same rock layers, then we can look at the periods in which these two animals lived as a clue about the age of the rocks, thus the animals themselves as well. The nautilus occurs in the fossil records around 410 million years ago, but it is not extinct, in fact it still exists and it is one of the oldest species on the planet. The goniatite has had different story, as it existed for around 70 million years, between 360 and 290 million years ago. We can see from this information that these two organisms coexisted throughout the whole existence of the goniatite, thus the rocks can have an age of anywhere from 360 to 290 million years.
Scientists can estimate more accurately at what point various groups of organisms diverged evolutionarily from one another by using which source of information?
Answer: DNA evidence
Scientists more accurately estimate the point of divergence in evolutionary relationships using molecular clocks and phylogenetic trees constructed from morphology, fossil records, and genetic data, which can include DNA analysis and protein sequence comparison.
Explanation:Estimating Divergence in Evolutionary RelationshipsScientists can estimate more accurately at what point various groups of organisms diverged evolutionarily from one another by using molecular clocks and analyzing phylogenetic trees. Molecular clocks use DNA sequences to estimate relatedness among species and determine when species diverged from a common ancestor. Phylogenetic trees are constructed using combined data from morphology, fossil records, and genetic information. These trees represent hypotheses of evolutionary relationships, and they continue to evolve with new discoveries and data.
By identifying homologous characteristics—traits that are similar due to shared ancestry—scientists can discern evolutionary connections between organisms. Using techniques like cladistics and applying the concept of maximum parsimony, scientists can determine the evolutionary timeline that suggests the simplest and most probable path of divergence.
Comparative data from the fossil record and molecular structures, such as DNA nucleotide sequences or amino acid sequences in proteins, enhance the accuracy of these estimates. Moreover, evolutionary investigations combine morphologic and genetic evidence to uncover the evolutionary history of life forms, contributing to the broader understanding of the 'tree of life.'
water is considered the universal solvent because is can dissolve
Answer: Polar substance, it dissolves polar substances, also called hydrophilic.
Explanation:
Water is a polar molecule and forms hydrogen bridges. Water is considered the universal solvent because it has great dissolving power. As water is a Polar substance, it dissolves polar substances, also called hydrophilic. Nonpolar substances, like oils, are hydrophobic and do not mix with water. The water is cohesive. Due to the formation of hydrogen bridges, water molecules attract strongly, keeping the substance stable. Also, water attracts other polar molecules, an association mechanism. That's why water wets polar materials like cotton and paper.
to find the main idea of a piece of writing,you can employ the techniques in which you?
Answer:
The main idea in a given piece of reading is implied by the introductory paragraph, and, or several meaning sentences that are in subsequent paragraphs.
Explanation:
The main ideas in the a given piece of work, specifically reading is contained in the first paragraph of the piece of writing. The first paragraph can be used to imply the main ideas in a topic without necessarily revealing it. The first concepts, terms, illusion and characters mentioned, certainly we can deduce the main idea.
Several sentences in paragraphs that carry almost similar, related and interrelated facts, in most cases are very essential in explaining the main idea. By looking at them in various paragraphs, one is able to find the sole message being communicated.
A scientist wants to observe the structure that joins a cell to neighboring cells. How should the scientists observe the detailed structure of the cell
They need to use a microscope
Answer:
The scientist should use an electron microscope.
Explanation:
Select the odd one out: jackal-crow-hyena-vulture
The odd one out would be the crow
The crow is the odd one out in the group because it's a bird capable of flying, unlike the jackal, hyena, and vulture which are terrestrial mammals.
Explanation:The odd one out of the group comprised of a jackal, a crow, a hyena, and a vulture is the crow.
This is because the crow is a bird while the jackal, hyena, and vulture are all mammals. Furthermore, the crow is the only one in the group that is capable of flight. The jackal, hyena, and vulture, on the other hand, are terrestrial animals.
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osmosis involves which of the following processes
Answer:
Movement of water from it higher potential to its lower potential.
Answer:
Osmosis is the chemical process.
Explanation:
Osmosis is the chemical process, where the solution moves from higher concentration to lower concentration through a semipermeable membrane. Osmosis may be slow or reversed, where the movement of solution is occured against the concentration gradient, from lower to higher concentration. Osmosis is similar to diffusion. Diffusion follows the same process as in osmosis without semipermeable membrane.
There are three types of osmotic solution:
Isotonic = Water moves in and out of the cell at an equal rate.
Hypotonic = Water moves into the, making it swell.
Hypertonic = Water moves out from the cell, like a raisin.
Which of the following lists the layers of the Earth from hottest to coolest?
inner core, outer core, asthenosphere, lower mantle, lithosphere
outer core, inner core, lower mantle, lithosphere, asthenosphere
inner core, outer core, lower mantle, asthenosphere, lithosphere
lithosphere, asthenosphere, lower mantle, outer core, inner core
Answer:
The correct list is inner core, outer core, lower mantle, asthenosphere, lithosphere.
Explanation:
Based on Structural features and chemical composition earth surface is divided into different layers. The main layers can be described as,
1. Core
2. Mantle
3. Crust
Core:
The core is further divided into inner core and outer core. The inner core is extremely hot and solid. The outer core is in fluid form and surround the inner core.
Mantle:
The mantle layer is composed of rocks. The earth's mantle is also divided into two main layers Lower mantle and upper mantle. Asthenosphere is viscous and present just below the rigid lithosphere.
Crust:
Crust is the outermost layer of earth. It is composed of variety of elements. Lithosphere is the part of Crust.
Answer:
The answer is 1.inner core, 2.outer core,3. lower mantle, 4.asthenosphere, 5.lithosphere
While reading a novel, Raoul isn't easily distracted by the sounds of the television or even by his brothers' loud arguments. This best illustrates
Raoul's ability to read without being distracted by environmental noise illustrates selective attention, which is a cognitive skill allowing someone to focus amid distractions.
The situation described where Raoul isn't easily distracted by the sounds of the television or his brothers' loud arguments while reading a novel best illustrates selective attention. This cognitive process allows individuals to focus on a specific stimulus while ignoring others. It's akin to what's often promoted in the twenty-first century as a way to combat the 'new attention economy', where our attentiveness is constantly challenged. Selective attention can be seen as a form of mindfulness training, allowing an individual to manage their focus in a world full of distractions.
do birds and insects share any structural similarities that would suggest they are closely related?
y/n and why?
Answer:
yes, bird have wings, and so do insects, as well as some birds communicate with each other, as do some insects, and although this may not be similar to each other, they are very interesting, that the birds feathers are actually heavier than there feathers, because their bones are hollow, and insects have an exoskeleton, so basically, they both have interesting bone features
Explanation:
Although birds and insects share some structural similarities like exoskeletons and compound eyes, these similarities are more often seen as examples of convergent evolution rather than proof of close relatedness.
Explanation:Yes, birds and insects do share some structural similarities, but this does not necessarily suggest they are closely related. They both have exoskeletons, although insects have a hard protective covering all over their bodies, while birds just have it on their wings (feathers). Additionally, both groups have compound eyes and they both have wings for flight, though they function and are structured differently. Birds have wings are developed as limbs with bones and muscles covered by feathers, whereas insects have their wings as an extension of their exoskeleton. These similarities are more often seen as examples of convergent evolution, where different species independently evolve similar traits, rather than evidence of close relatedness.
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Which causes natural selection to occur?
A-populations below the carrying capacity
B-a lack of competition
C-the presence of predators
D-unlimited resources
Answer:
c. Presence of predators
Explanation:
The presence of predators can cause natural selection to occur. In the presence of predators, individuals with advantageous traits such as faster speed, better camouflage, or stronger defenses are more likely to survive and pass on their genes to the next generation. Hence option c is correct.
What is natural selection?Natural selection is the process by which certain traits or characteristics become more or less common in a population over time due to their impact on survival and reproduction.
As a result, the frequency of these traits increases in the population, leading to an overall change in the population's genetic makeup.
The mechanism of natural selection was first proposed by Charles Darwin as part of his theory of evolution by natural selection. Darwin observed that individuals in a population vary in their traits, and those with traits that help them survive and reproduce are more likely to pass on their genes to the next generation.
Over time, this can lead to the evolution of new species, as advantageous traits accumulate and become fixed in the population.
Therefore the correct option is C the presence of predators.
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Which of the following correctly compares steroid and nonsteroid hormones
A. Nonsteroid hormones enter the nucleus and affect protein synthesis while steroidal hormones do not. B. Neither steroid nor nonsteroid hormones enter the cell membrane. C. Steroid hormones bind to receptors on the outside of the cell and rely on secondary messengers while nonsteroidal hormones do not. D. Steroid hormones enter the nucleus and affect protein synthesis, while nonsteroidal hormones do not.
Answer:
The correct answer is option D.
Explanation:
Steroid hormones are basically are lipid-soluble molecules and derived from cholesterol. Steroid hormones pass through cell membranes because they're lipid soluble, and attach to a receptor that is present inside the cell, entering the nucleus, binding to DNA, and beginning gene transcription and translation and produce protein.
Nonsteroid hormones are water soluble hormones that do not enter the cell membrane but bind to cell membrane receptors that produce a chemical signal inside the target cell.
Thus, the correct answer is option D.
The correct comparison between steroid and nonsteroid hormones is C. Steroid hormones bind to receptors on the outside of the cell and rely on secondary messengers while nonsteroidal hormones do not.
Explanation:Steroid hormones, which are derived from cholesterol, are lipid-soluble and can diffuse through the cell membrane to bind to intracellular receptors in the cytoplasm or nucleus. This binding triggers the movement of the hormone-receptor complex to the cell nucleus and the activation of specific genes, leading to the synthesis of proteins.
On the other hand, nonsteroid hormones, such as amino acid-derived and polypeptide hormones, are not lipid-soluble and cannot directly enter the cell. Instead, they bind to receptors on the outer surface of the plasma membrane, triggering signaling pathways and intracellular activity, but do not affect protein synthesis or enter the nucleus.
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The cells of plants and animals are similar, except for a few different structures. Which structures are only found in
plant cells?
Bipedal walking is more energy efficient
A. than knuckle walking.
B. than quadrupedalism.
C. when running.
D. than arboreal locomotion.
Answer:
C. When running that is the answer
Answer:B.quadrupedalism
Explanation:
Studies today proves that bipedal locomotion evolved from quadrupedalism because it was more energy efficient.
In a research conducted by scientists
4 humans and 4 chimpanzees were made to run on a treadmill, the chimpanzees were trained to walk quadrupedally and bipedally on treadmill. When the results came out humans had used only one quarter of the energy the chimpanzees had used while knuckle walking.
Which of the following is not a characteristic of anaerobic species?
A. They do not have mitochondria.
B. They make ATP from glucose.
C. They use fermentation to make ATP.
D. They live in oxygen-rich settings.
Answer:D
Explanation:good guess
Answer:
The correct answer is option D.
Explanation:
Organisms or particularly species that survive in the absence of free oxygen are called anaerobes or anaerobic species. Some of the anaerobes grow only in the absence of free oxygen are called strict or obligate anaerobic species.
Anaerobic species only form 2 molecules of ATP for every 1 molecule of glucose, while aerobic cells produce 38.Fermentation metabolism permits these species to survive in some of the most extreme environments.
Thus, the correct answer is option D.
which is the SI base unit of mass
The SI base unit of mass is the kilogram (kg), which was historically based on a physical object but has been redefined in 2019 in terms of the Planck constant to maintain its stability over time. A kilogram is about 2.2 pounds, and a gram is 1/1000th of a kilogram.
Explanation:The SI base unit of mass is the kilogram (kg). Historically, it was defined by a platinum-iridium cylinder, known as the International Prototype of the Kilogram (IPK), which was stored at the International Bureau of Weights and Measures near Paris. However, in May 2019, the definition was revised and is now based on fixed numerical values of the Planck constant and other fundamental physical constants. This redefinition ensures that the unit will remain stable over time, unlike the IPK which could lose or gain atoms, and thus mass, over time.
Laboratories commonly use balances for measuring mass, which must be calibrated using a standard mass to ensure accuracy. The kilogram is pivotal in making mass comparisons because all other masses are ultimately compared to it. As of 2019, with the advancement in science and technology, a more accurate way of defining a kilogram using the Kibble balance and Planck's constant has been adopted.
A kilogram is equivalent to about 2.2 pounds, and a gram is exactly 1/1000th (10-3) of a kilogram. These measurements fall under the metric system widely used in scientific and engineering contexts.
Why are fat cells so much larger than red blood cells
Final answer:
Fat cells are larger than red blood cells because they store energy as fat, which takes up significant space within the cell, while red blood cells are small and shaped to efficiently transport oxygen.
Explanation:
Fat cells, or adipocytes, are much larger than red blood cells due to their function in the body. Adipocytes are specialized to store energy in the form of fats; they contain large fat droplets that occupy most of the cell's volume. In contrast, red blood cells, or erythrocytes, are designed to maximize their oxygen-carrying capacity. Erythrocytes are small and have a biconcave shape to increase the surface area for oxygen transport. They lack a nucleus and most organelles to provide the maximum space for hemoglobin, the protein that binds to oxygen.
Besides serving as energy reserves, adipose tissue offers insulation from cold temperatures and mechanical protection. The adipose tissue, rich in capillaries, allows for rapid mobilization and storage of fat molecules. In contrast, erythrocytes are designed for a different purpose entirely—they transport oxygen through the blood to various parts of the body and are produced in the marrow of bones, living for about 120 days before they are destroyed.
Lava plateaus form when _____.
Answer:
Lava plateaus for when a large amount of highly fluid lava flows over an area
Answer:
Lava plateaus form when lava flows over an area
Explanation:
When lava flows over an area a wide flat surface called lava plateau is formed.Lava is molten rocks that are formed deep in the surface of the Earth where temperatures are very high and can melt rocks.The lava can flow to cover a large area of land and solidify to create the plateau.An example is the Colombian plateau in the United States.
Jane is observing a cell under an electron microscope. She identifies an organelle having an outer and an inner membrane. She also notices that the outer membrane is smooth while the inner one is highly folded. Which organelle is Jane observing?
A.
Mitochondria
B.
Golgi bodies
C.
Nucleus
The correct option is
Mitochondria is one of the organelles that are found in living cells and it is the one responsible for the production of ATP, which is the source of energy that is usable by the cells. Mitochondria is designed in such a way that, it will be able to carry out its functions efficiently. Mitochondrial has two membranes, one at the outside and the other one at the inside. While the outer membrane is smooth, the inner one is highly folded and it formed a structure called cristae. The folding of the inner membrane serves to increase the surface area inside the mitochondria.
Answer:
The correct answer in A. Mitochondria
Explanation:
I got it right on Edmentum
What are the genotypes of the parents in the monohybrid cross below if the following offspring genotypes are predicted?
A) Tt and Tt
B) TT and tt
C) Tt and TT
I can't see the picture. If you resend the picture then I can answer it.
Jill has decided that she wants to start conserving gasoline. Jill is concerned about the rising price of gas, as well as how the by-products from gas engines pollute the atmosphere.
What solution would help Jill solve this problem?
Jill should start building a renewable energy resource plant. What this means is that she should find the right people to convert by-products of gas into usable energy in a particular community. To solve her problem, she must also find statistics and studies on atmospheric pollution in order for her to find the right equipment to start conserving gasoline.
Answer:
Deciding to ride her bicycle to and from work, instead of driving.
Explanation:
Correct answer
What causes high and low tides?
Answer:
High and low tides are caused by the moons gravitational pull on the earth.
Explanation:
Hope i helped you.
They are caused by the moons gravitational pull
Answer the question about the food web shown below.
What will most likely happen if the population of beetles drops suddenly?
Answer: C. Coatis will eat more figs.
Explanation:
A food chain is a sequence of distribution of energy in the form of food. In a food chain one organism is consumed by another organism. A food web forms when two or more food chains are interlinked.
According to the given food web, the strangler fig is eaten by the beetles and coatis. If the population of beetles declines the competition for the same source of food that is strangler fig will reduce between the two species of beetles and coatis. Hence, coatis will eat more figs if the population of beetle decline or drop.
Answer:
Coatis will eat more figs
Explanation:
_____ is a behavior in mating in which one male breeds with a female for a certain period of time and then finds a different mate the following mating season. Monogamy Serial monogamy Polygyny Polyandry
Answer:
Polygyny? i think i am not sure
it’d be serial monogamy! which is (When mates are monogamous for a single mating system and then will find more or different mates during the following seasons).
Mice eat corn. Hawks eat mice. Which term describes hawks in this food chain?
quaternary consumer
primary consumer
tertiary consumer
secondary consumer
Answer:secondary consumer
Explanation:the corn is the producer, the mice are the primary consumers and the hawk is the secondary consumer. I THINK.
Answer:tertiary consumer
Explanation:
Drag the tiles to the correct boxes to complete the pairs.
Match each nutrient to it’s primary function in the body.
-carbohydrates
-proteins
-fats
-vitamins
1.acts as antioxidants
2.provide a quick source of energy for cells and tissues
3.form tissues, growth factors,and hormones
4.form structural components of the cell membrane
Carbohydrates is 2
Proteins is 4
Fats is 3
Vitamins is 1
Answer:
- Carbohydrates is provide a quick source of energy for cell and tissue.
- Proteins is form tissue, growth factors and hormones
- Fats is form structural components of the cell membrane
- Vitamins is acts as antioxidants
The two-step process by which cells read a gene and produce a string of amino acids that will eventually become a protein is called: ____________________ and ______________________
Answer:
transcription and translation
The two-step process by which cells read a gene and produce a protein is called transcription and translation. These two processes form the basis of gene expression whereby genetic information is transferred from DNA to RNA (transcription), and then from RNA to protein (translation).
Explanation:The two-step process by which cells read a gene and produce a string of amino acids that will eventually become a protein is called transcription and translation.
In the process of transcription, a strand of messenger RNA (mRNA) is synthesized, which is complementary to the gene of interest. This is carried out in the nucleus of the cell where a region of the DNA unwinds and the two strands separate. The gene's DNA code is then transcribed to form the complementary stand of mRNA.
After transcription, the next step is translation. Here, the codons (triplets of nucleotides) on the mRNA are translated using another type of RNA called transfer RNA (tRNA) into a sequence of amino acids. This happens in the ribosomes, the 'desk', where the mRNA sequence is read and translated into the amino acid sequence of the protein that it encodes. This two-step process is collectively referred to as gene expression or the central dogma of molecular biology.
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Classify the organisms based on how they obtain food.
2
Autotroph
Heterotroph
On Plato/Edmentum?!
Answer:
A Heterotroph derives its nutritional requirements from complex organic substances.
A Autotroph derives its nutritional requirements from simple organic substances.
Explanation:
Answer:
AUTOTROPH: trees, algae carrots
HETEROTROPH: tiger, deer, human
Earth’s ozone layer _____.
exists only over Antarctica
has been thickening over the past several years
traps carbon dioxide in the stratosphere
filters harmful ultraviolet radiation from the sun
Earth’s ozone layer filters harmful ultraviolet radiation from the sun.
Which statement is true of magnets?
Answer:
The answer would be B. Earth is an electromagnet.
Explanation:
The Earth is a giant electromagnet. It's electromagnetic field is generated from the currents of electricity coming from molten metal flowing in the outer core of our Earth. The heat from the inner core causes convection and that is how electric current flows within Earth.
Answer:
A magnet always has two poles.