Centrioles are tiny structures found in most eukaryotic cells, located near the nuclear envelope in the region known as the centrosome. The centrioles play a key role in cellular division.
Explanation:Centrioles are tiny cylindrical structures found in most eukaryotic cells, excluding most plant cells. They are located in the cell's cytoplasm, near the nuclear envelope, in a region referred to as the centrosome. Centrioles are made up of clusters of microtubules arranged in a specific pattern and play a crucial role in cellular division where they can organize the formation of the spindle fibers that separate chromosomes during cell division.
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Comprehensive Biology
What scientific breakthrough occurred around 50 years ago that
of the biology puzzle together?
Discovery of cells
Evolutionary theory
The discovery of cells is correct.
Scientists recently discovered a species of bacteria that’s capable of photosynthesis, but it’s anaerobic and doesn’t produce or use oxygen for respiration. Which process will be absent in this organism?
Answer:
Bacteriochlorophyll
Explanation: Bacteria that contain bacteriochlorophyll do not use water as an electron donor and therefore do not produce oxygen.
Answer:
Krebs cycle.
Explanation:
Anaerobic bacteria do not do the process called the Krebs Circle. This is because the Krebs Circle only happens in the presence of oxygen and anaerobic bacteria do not survive in the presence of oxygen.
The Krebs cycle, also called the citric acid cycle, or the tricarboxylic acid cycle, is one of the phases of cellular respiration discovered by biochemist Hans Adolf Krebs in 1938. This phase of respiration occurs in the mitochondrial matrix and is considered a amphibolic, catabolic and anabolic route.
In the Krebs cycle, pyruvic acid (C3H4O3) from glycolysis undergoes oxidative decarboxylation through the action of the pyruvate dehydrogenase enzyme found within the mitochondria of eukaryotes, and reacts with coenzyme A (CoA). The result of this reaction is the production of acetylcoenzyme A (acetylCoA) and a carbon dioxide (CO2) molecule. AcetylCoA then reacts with oxaloacetate, or oxalacetic acid, releasing the coenzyme A molecule, which does not stay in the cycle, forming citric acid.
The Krebs cycle is oxygen dependent because decarboxylation of pyruvic acid is by oxidation; Once oxidized, this acid reacts with coenzyme A to form acetylcoenzyme A. Throughout the Krebs cycle, a large amount of ATP is produced, hence it is considered a major energy producer.
Which statement accurately describes reproduction in animals
All animals can reproduce asexually, and some can reproduce sexually
All animals can reproduce sexually, and some can reproduce asexually
Animals only reproduce sexually
Animals only reproduce asexually.
Answer:
B
Explanation:
it just is trusttttttt
Animals can use both sexual as well asexual means for their reproduction. Some animals reproduce asexually through budding while others can reproduce through both sexual as well as asexual modes. Higher animals reproduce through the sexual mode of reproduction. So the correct answer is Option B.
Which animals reproduce asexually?Oligochaetes, planarians, sea stars, starfish, sharks, Crayfish, wasps, snakes like pythons, etc. are some of the animals that reproduce asexually. In the asexual mode of reproduction fusion of gametes does not occur and there is no change in the number of chromosomes of an individual. The same set of genes is passed on from the parent to the offspring and the newly formed offspring is an identical copy of its parent.
Some animals show an alteration between the sexual and asexual modes of reproduction. This is known as heterogamy. Examples of heterogamy include insects and rotifer.
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Drag each label to the correct location on the image.
G
Organisms adopt different strategies and structures to make sure their offspring
it uses.
herds young into
center of group
produces many
offspring at once to
protect against high
predation risk
protects offspring
until environmental
conditions are ideal
for growth
COO
B
13
1994
7
ODOS
SI
.
AN
.
I
Answer:
1)herds young in to center of group
2)produces many
offspring at once to
protect against high
predation risk
3)protects offspring
until environmental
conditions are ideal
for growth
Explanation:
Answer:
1)herds young in to center of group
2)produces many
offspring at once to
protect against high
predation risk
3)protects offspring
until environmental
conditions are ideal
for growth
Explanation:
Two strands of DNA are joined to each other or held together by
two strands of DNA are held together by weak hydrogen bonds.
What is hemoglobin in the blood?
Answer:
Hemoglobin is a protein contained in the red blood cells which transports oxygen to the tissues and body organs and carries carbon dioxide from the body organs and tissues back to the lungs.
Explanation:
Hemoglobin is a protein contained in the red blood cells which transports oxygen to the tissues and body organs and carries carbon dioxide from the body organs and tissues back to the lungs.
which action is a reflex action
Answer:
blinking when light is flashed in the eyes
Explanation:
Edmentum, PLATO, etc.
Hope I helped :)
which is an example of a vestigial structure?
A: paw of a lion
B: wing of a bird
C: appendix of a human
D: tail of a cat
(I think it's A but I'm not sure)
Answer:
Pelvic bone of a snake
Explanation:
Which statement is an example of mutualism?
O
A.
Bees sting other organisms when they sense danger.
B.
Bees pollinate flowers while obtaining nectar.
C.
Bees have black and yellow stripes that warn other organisms of danger.
OD.
Bees help maintain an ecosystem's native cacti species through pollination.
Reset
Next
ES
Mutualism is a relationship where both parties are benefited
B. Bees pollinate flowers while obtaining nectar.
The bees get nectar and the flowers get pollinated
Hope this helped!
~Just a girl in love with Shawn Mendes
A scientist discovers a new body between the orbit of Neptune and the Kuiper Belt. The object is round and travels in an orbit around Neptune with other space objects. The scientist claims that she has found a new dwarf planet. Where is the scientist’s error?
The error is that an object orbiting Neptune would not be classified as a dwarf planet because it does not orbit the Sun directly, which is a requirement for dwarf planet status.
Explanation:The scientist's error lies in identifying an object that orbits around Neptune as a dwarf planet. By definition, a dwarf planet must directly orbit the Sun, not another planet. According to the International Astronomical Union (IAU), a dwarf planet must satisfy certain criteria, including orbiting the Sun and having sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a near-spherical shape. However, a key feature is that while a dwarf planet must have cleared the neighbourhood around its orbit, an object that is gravitationally dominanted by and in orbital resonance with a planet, as described in the scenario, would likely be considered a moon or satellite of that planet rather than a dwarf planet. The Kuiper Belt is a region beyond Neptune that includes trans-Neptunian objects (TNOs) and is replete with potential dwarf planets, like Pluto and Eris, which are in direct orbit around the Sun and not tethered to another planet's orbit.
Molecular models of two different substances are shown below. In the
molecule on the left, the oxygen atom pulls on electrons more strongly than
the hydrogen atoms. In the molecule on the right, the two oxygen atoms pull
on the shared electrons with the same strength.
Water molecule, H,O Oxygen molecule, Oz
When the two substances are put in the same container, they do not attract
each other. Why does this happen?
A. They both contain oxygen.
B. One is polar and one is nonpolar.
C . They are both polar.
D. They contain different elements.
Answer: Option B
Explanation:
The molecules that is described in the model is water [tex]H_{2}O[/tex] and other molecule is [tex]O_{2}[/tex] molecule.
Due to difference in electronegativity of hydrogen atom and oxygen atom there is partial positive charge on each hydrogen atom and partial negative charge on oxygen atom of [tex]O_{2}[/tex] molecule.
Hence, water is a polar molecule.
Whereas in [tex]O_{2}[/tex], there is covalent bonding due to sharing of electrons. Hence, this molecule is covalend and hence, it is neutral in nature.
Therefore, [tex]O_{2}[/tex] is a non-polar molecule.
So, both the molecules are put together in the container then there will be no attraction in between them because water molecules contains charge but oxygen molecules does not contain any charge as they are neutral.
Thus, we can conclude that one molecule is polar and other is non polar so they do not attract each other.
HELP ASAP!!!!Question 44 is an open-response question. Wild red 6 poin
wolves were once common in the southeastern United
States. As this area became more developed, the number
of wild red wolves was drastically reduced to about 20
individuals by 1967. These remaining wolves were
captured and bred. In 1987, some captive-born red wolves
were released into an area of North Carolina. Today, there
are more than 50 wild red wolves living in North Carolina.
a. Identify two ways development in the southeastern
United States most likely contributed to the decline of the
red wolf population. Explain each of your answers. b.
Compare the red wolf's genetic diversity before the
southeastern United States became more developed to the
red wolf's genetic diversity in 1967. Explain your answer. c.
Describe one other action, besides capturing and breeding,
that could increase the number of red wolves in the
southeastern United States. Explain how this action could
increase the number of red wolves.
a. The development of the southeastern part of the United States affected many species of animals, including the red wolves. The red wolves were seen as a species that is not useful and not wanted, and on top of that dangerous. Apart from the fact that the development led to destruction of the habitat of the wolves, so lot of them died out because of loss of habitat, the hunting played an even bigger role. As there were more and more people, and the encounters were becoming more often, and the wolves also had less food and started to attack the domestic animals, the hunters got activated and they almost killed the wolves to extinction, with only 20 individuals left.
b. Before the development of the southeastern apart of the United States, the red wolves were in relatively large number. This also meant that the genetic diversity was much greater among the red wolf population, resulting in healthy, stable, and strong population of this predator. When the situation came that only 20 individuals were left, then the genetic diversity shrinking to a very low level. Those 20 wolves did not had any other choice then to breed between each other, so in only couple of generations the genetic diversity become extremely low. That is very dangerous for a population, as if some of the individuals have some bad mutation or disease carrying with them, they can affect all the rest and the population may die out easily.
c. Apart from the capturing and breeding of the red wolves, the other method to increase their population is to reintroduce them into the areas where they once lived, under condition that it is a protected area. By reintroducing enough individuals so that the population can reproduce in a healthy manner, the red wolves population can easily and quickly reestablish itself in a natural manner, also contributing to restoring the natural order in their former habitat.
What is the purpose of the retina?
to convert light rays into neural impulses
to focus incoming light rays
O to see sharpness in images
to change size depending on the light it sees
Answer:
The purpose of the retina is to receive light that the lens has focused, convert the light into neural impulses
Answer:
the answer is option a to convert light rays into neural impulses
Explanation:
A monophyletic group is defined as a common ancestor and all of its descendants. A _______ is defined as a common ancestor and some of its descendants.
A. clade
B. monoclade
C. paraphyletic group
D. diphyletic group
Answer:c
Explanation:
A paraphyletic group is defined as a common ancestor and some of its descendants. The correct option is C.
A paraphyletic group is characterized as a common ancestor and some of its descendants, but not all.
It comprises a subset of the offspring of a common ancestor but excludes specific branches or lineages that evolved independently.
When a group is classified into subgroups, but not all descendants are included in each subgroup, this idea is frequently employed in biological categorization.
A monophyletic group (option A) comprises all descendants of a common ancestor, whereas a paraphyletic group (option C) includes just some descendants of a common ancestor.
Thus, C. paraphyletic group is the right answer.
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How do scientists collect data?
Answer:
Ask a questionCreate a hypothesisConduct an experiment and gather evidenceAnalyze the evidenceDoes it work/fit? (If not, go back to step 2)Communicate with others to see if the accept your idea. (If not, go back to step 2)The graph shows three different projections of human population growth. If you assume that the high projection is correct, what is one way the larger human population can ensire it has enough food?
A. By returning to hunting and gathering
B. By finding more effcient ways of growing crops
C. By learnign to eat a lot less food
D. By focusing more on ideas and services
Answer:
B
Explanation:
They are correct. It is B, by finding more efficient ways of growing crops
The one way the larger human population can ensure it has enough food is option B. By finding more efficient ways of growing crops.
What are the ways for the larger human population to ensure it has enough food?Grow a wider variety of crops. Around 60 percent of all calories consumed come from just four crops: rice, wheat corn, and soy. Ensuring food access and availability in the face of climate change will require the production of a wider range of foods.Reduce Food Waste. An estimated one-third of all food produced is wasted from farm to home. One of the solutions is to upcycle food that would have been thrown away. This includes turning waste food into useful items, finding buyers for food that would rot in the fields if unsold, to selling non-uniform – or ugly – fruits and vegetables.Shift Diets to More Plant-Based Foods. A diet high in meat is very wasteful. Meat from cattle, sheep, and goats uses precious resources, and the demand for meat and dairy products is steadily growing. The only way for more people to have access to animal-based proteins is for other people to consume less. Look to the Seas for More Food. With the earth's population growing, turning to the world's oceans for food is the new blue food revolution. But taking more fish out of our oceans and inland waters is not the answer.To learn more about population and food, refer to: https://brainly.com/question/18681084
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Why is summer considered the best out of the 4 seasons? Explain why...
Summer's considered the best out of the 4 seasons because most people are on summer vacation and they are able to spend quality time with their family without all the snow or cold weather.
7. Which of the following is NOT a reason that cells divide?
a. cells are too small to function
C. growth and development of an organisms
d. maintain proper surface area-to-volume ratio
The following is NOT a reason that cells divide - a. cells are too small to function
The major reasons for the cell division are as follows
Food, Waste, and Gas Exchange to ensure the survival of cell these toxic substance need to remove from the cell and to maintain a workable ratio of surface area to volume to allow an efficient transfer of materials in and out of the cell.GrowthIn order for an organism to grow, they must divide so they can get larger.Repair - cells requires continuous repairing.Reproduction or increase their number.Thus, The following is NOT a reason that cells divide - a. cells are too small to function
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Which measurement unit represents volume?
liter
kilometer
square centimeter
centigram
Liter because you're measuring liquid.
Hope this helps!!!
Muscular dystrophy can result in loss of mobility and lack of coordinated movements. Given this information, what does mu
• Muscle tissue from communicating with the brain
Connective tissue from creating blood cells
Epithelial tissue from excreting and absorbing
Bone tissue from supporting the weight of the body
Answer:
Muscle tissue from communicating with the brain
Explanation:
Answer:
Muscle tissue from communicating with the brain
Explanation:
Muscular dystrophy is the term used to describe a group composed of more than 30 diseases that directly affect the muscular system. These diseases are of a genetic nature and are directly linked to the X chromosome. As already mentioned, this group of diseases causes damage to the muscles and their progressive degeneration, in addition to their malfunction, because it prevents muscle tissue from communicating with the brain. .
These diseases are commonly present in men, although women are asymptomatic carriers of the defective gene responsible for the disease.
which interaction would be an example of competition?
A. clown fish and anemones
B. rabbit and hawks
C. sharks and remoras
D. weeds and planktons
E. sharks and planktons
An example of competition is found in option D, where weeds and plankton (especially aquatic plants, also known as 'weeds') compete for resources such as sunlight.
Competition occurs between individuals of two or more species that utilize the same resource in a given area. Weeds typically compete for water and nutrients with other plants in their vicinity. Although planktons are not directly competing with weeds, this option would still be an example of interspecific competition for resources such as sunlight if considering aquatic plants, which are often referred to as 'weeds' in the context of competition with algae (which are a type of plankton).
Which of the following best describes the purpose of technology?
Answer:
A.
Explanation: The others just don't seem right I guess.
which will form an ionic bond?
A. A positive ion and a negative ion
B. Two positive ions
c. Any two atoms
D. Two carbon atoms
NEN
Answer:
A. A positive ion and a negative ion
The diagrams below show the anatomy of the eye in four different animals. Select the two that provide the best evidence of inheritance from a shared ancestor.
Answer:
Option A and C
Explanation:
The anatomy of eye A and C share common characteristics. Though It may appear that the eye anatomy in option D is similar to the anatomy of eye A and C, but if the image is seen properly, it could be noted that the retina in option D is in front of the nerve fiber while in case of both option A and C, it lies at the back side of nerve fiber.
Though there is variation in lens shape in option A and C but yet they resemble very closely in their structure. Option B is an outlier.
Hence, option A and C are correct
Answer: the large one and the smallest one
Explanation:
right on plato
electron movement around the nucleus of an atom is analogous to the way
Answer:
yes
Explanation:
extension of proton to electrons
Answer:
yes
Explanation:
Protons and neutrons make up the nucleus in the center of the atom. “Early on, we thought that electrons were revolving around the nucleus like planets,” Cooley said. If you add energy, electrons can move to a higher orbital level and then back again when the energy returns to normal.
4
The Indian leaf butterfly has traits that allow it to resemble a leaf. The bright colors of the
monarch butterfly indicate that the butterfly tastes bad and can be poisonous.
How does the appearance of these butterflies help them to survive?
F
The Indian leaf butterfly is able to avoid predators while the monarch butterfly warns
predators away.
G. The Indian leaf butterfly frightens predators away while the monarch butterfly poisons
predators before they can eat it.
H
Both butterflies rely on camouflage to avoid predation.
J
Both butterflies cooperate with one another to avoid predation.
Answer:
F
Explanation:
the Indian butterfly hide from its predators making it hard for them to find them while the monarch scares its predators away cause they know it is poisons
The monarch butterfly warns predators away while the Indian leaf butterfly is able to avoid predators.
What is the difference between a monarch and an Indian butterfly?They have a different strategy to fight predators for their survival monarch butterflies suggest that the butterfly tastes bad and can be poisonous, while Indian butterflies have traits to hide.
Cardenolides or cardiac glycosides is a poison that monarch butterflies obtain from the plants that they eat, store this poison, and used it as a chemical defense against predators.
Indian butterflies use the strategy of camouflage, having traits to look in the appearance like leaves, help to survive predators.
Therefore, the main difference is the strategy for survival, monarch butterflies use chemical defense, while Indian leaf butterflies use camouflage.
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Which of these definitions have been paired with the correct type of cell?
Different types of cells in the human body are specialized for specific functions, such as B cells and T cells in the immune system, and natural killer cells targeting virus-infected or cancerous cells.
The question pertains to the functions of different types of cells in the human body. For example, B cells and T cells are types of lymphocytes which play crucial roles in the immune system. B cells are responsible for producing antibodies that bind to antigens and neutralize or mark them for destruction. T cells can be subdivided into helper T cells that aid in immune response coordination and cytotoxic T cells that destroy virus-infected cells and cancer cells.
Natural killer cells are also part of the immune system, and they specialize in recognizing and attacking cells that are infected with viruses or have become cancerous, without the need for prior exposure to the pathogen.
In the case of cell division, the process could be either mitosis or meiosis, depending on whether the context is growth and repair or sexual reproduction, respectively.
Which flow chart best shows the relationship between the cell structures that are listed?
gene DNA chromosome nucleus
gene chromosome DNA nucleus
DNA gene chromosome nucleus
DNA chromosome gene nucleus
Answer:
DNA gene chromosome nucleus
Answer:
The correct answer will be option-DNA gene chromosome nucleus
Explanation:
The genetic material of the organism is organised into a highly ordered and packed structure called chromosome.
The genetic material of the organism in higher organism is enclosed in a double membrane-bound organelle called nucleus. The genetic material of the organism is organised into a highly ordered and packed structure called chromosome. The nucleus contains the genetic material in the form of a chromosome.
Each chromosome is a sequence of the DNA present in the double-helical form. The chromosome contains the coding segment of DNA which provides the instructions to the organisms.
Thus, DNA gene chromosome nucleus is the correct answer.
which best describes the earlest land plants
Answer:
The land is believed to be inhabited by the algae on the first. The earliest land plants were the ones which did not have deep roots. They were the non-vascular plants and included mosses, hornworts, and liverworts. i.e., the bryophytes. They reproduced through spores. They also had very thin leaves.
Question 20 of 20 :
Select the best answer for the question.
20. Which of the following is not a defining characteristic of plants?
O A. Plants are prokaryotic
O B. Plants are eukaryotic
O C. Plants have cell walls
O D. Plants contain chloroplasts for photosynthesis
Answer: Option A
Explanation: Plants are the group of eukaryotes that performs the process of photosynthesis. This is due to the presence of chloroplast that helps in trapping sunlight.
The radiant energy is converted into chemical compound known as glucose. Plant cell posses cell wall which acts a barrier between the pathogens, water, other harmful substances and plant.
The correct answer is option A