Answer:
cells duplicate so when there is no cell it cant make any
Explanation:
The statement that there must be a preexisting cell in order for a new cell to form is known as cell theory.
What is cell theory?The scientific idea that cells make up living organisms, that they are the fundamental structural and organizational unit of all species.
They all originate from previously existing cells is known as cell theory. It was first proposed in the middle of the nineteenth century.
Because cells are the building blocks of all life, cell theory is essential for our understanding of biology.
We can have single-celled organisms like yeasts and bacteria. All living things grow and develop on the basis of cell division, or the division of a cell from one to two to four.
A vital process for life is mitosis. A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes.
Thus, the statement "cell arises from pre-existing cells" comes from cell theory.
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A biologist discovered a new animal. Upon studying its embryonic development, she observed radial cleavage with the blastopore developing into an anus. This animal was categorized as a parazoan. pseudocoelomate. deuterostome. protostome. radiata.
Answer:
The correct answer is ''deuterostome''.
Explanation:
Deuterostomes are a superphylum of animals in which the anus is formed in or near the blastopore area in the developing embryo, and the mouth is secondarily formed elsewhere. The oral apparatus that these adult animals enjoy does not come from the embryo's blastopore. Instead it is a new formation. They enter the Bilateria classification, where species that enjoy bilateral symmetry are incorporated. In deuterostomes, the primary phases of division occur in parallel to the axis between the tips. That is, the segmentation they have is radial when the embryo is in state 1 with four cells.
Describe the similarities and differences between the cheek cell wet mount and dental plaque wet mount.
Answer:
Cells from the cheek are a type of epithelial cell, similar to skin. ... They can be seen faintly even at 40x (scanning power), but the most dramatic images are at 400x where the nucleus is clearly visible as a dark spot in the center of the cell.
Explanation:
As a group, you and three other students must make a presentation on an animal. Which option is the best example of your group coming to a consensus on the
presentation topic?
The group cannot agree on what animal to choose so your teacher chooses your presentation topic.
Each member gets a vote and the animal with the most votes will be the presentation topic.
A group member is selected as the team leader and the team leader chooses the presentation topic.
The group writes options on slips of paper, puts them in a hat, and the paper that is selected will be the presentation topic
Each member gets a vote and the animal with the most votes will be the presentation topic, is the best example of your group coming to a consensus on the presentation topic.
what are the different types of presentation ?Presentations should be always unique as the information we are trying to present.
An informative presentation is always educational, concise, and only specific points are mentioned.
The main aim of an informative presentation is to share information with others.
An Instructive Presentations teaches to the audience on a specific topic, but it goes beyond sharing facts.
Persuasive Presentations is to sell something or persuade the audience to take actions. It present an issue and explain their solution using data.
Motivational Presentations is an inspiring presentations, aim to generate interest in an audience’s approval.
Decision-making Presentations is to shares a problem, their solution and their outcomes can help speed along the process.
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This is the last
What are the vestigal organs present in human body??
Answer:
Charles Darwin listed a number of putative human vestigial features, which he termed rudimentary, in The Descent of Man (1871). These included the muscles of the ear; wisdom teeth; the appendix; the tail bone; body hair; and the semilunar fold in the corner of the eye.hope it's helpful .!pls mark me in brainlistWhich of the following is not a natural disaster ?
1 . Tsunami
2. Earthquake
3. Terrorism
4. Hurricane
Answer:
terrorism
Explanation:
everyhthing else is natural because hurricanres come from wind and tide overflow tsunamis are caused by earth quakes and earthquakes are natural
The one that follows that is not a natural disaster is the terrorism that is present in Option 3, as the terrorism is done by man while the natural disasters are caused by nature, such as the hurricane and earthquake.
What role does a natural disaster play in the ecosystem?Natural disasters are phenomena caused by nature, such as cyclones, earthquakes, and tsunamis, and they cause significant damage, which may be indirectly caused by man as man causes global warming, climate change, and so on. The terrorism is man-made or artificial, as certain people are involved and harm other people or the country.
Hence, the one that follows that is not a natural disaster is the terrorism that is present in Option 3, as the terrorism is done by man while the natural disasters are caused by nature, such as the hurricane and earthquake.
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Listt any four general characteristics of pisces.
Indicate whether each statement is true or false: 1. Compliance is the tendency for blood vessel volume to increase as blood pressure decreases. True 2. Blood vessels with a large compliance exhibit a small increase in volume when the pressure increases a small amount. True 3. Venous compliance is approximately 24X greater than arterial compliance, so as venous pressure increases the volume of veins greatly increases. True
Answer:
1. False
2. False
3. True
Explanation:
1. Compliance is the capacity of a container to increase in size to allow it hold more content. Blood vessel, arteries and veins expand (increase in volume) to be able to accommodate a surge in blood flow, which is as a result of an increase in pressure of the blood from the heart pumping of the blood
Therefore, compliance in the tendency for blood vessel volume to increase as the blood pressure increases not decrease
The statement is false
2. A large compliance is indicative of being highly sensitive to changes in pressure
Compliance, C = ΔV/ΔP
From the above equation, a blood vessel with a large compliance, exhibit a large increase in volume when the increase in pressure is small
Therefore, the statement 'Blood vessels with a large compliance exhibit a small increase in volume when pressure increases a small amount; is false
3. The compliance of the vein ranges from 10 to 20 times (30 times in some literature) greater than arteries. A factor which can be affected by the vascular smooth muscle contraction or relaxation
Therefore, the statement, 'venous compliance is approximately 24 times larger than arterial compliance, so as venous pressure increases the volume of veins greatly increases' is true
What is produced during the replacement reaction of Ba(NO3)2 and Na2SO4?
2BaNa + 2NO3SO4
2NaNO3 + BaSO4
NaNO3 + BaSO4
BaNa2 + (NO3)2SO4
Answer:
2NaNO3 + BaSO4
Explanation:
Answer:
2NaNO3 + BaSO4
Explanation:
Hydrocarbons are burned to produce water and carbon dioxide. Propane (C3H8) is a homologous series alkane that belongs to the hydrocarbon family. As a result, when propane is burned, three molecules of carbon dioxide and four molecules of water are produced.
Because there is an overabundance of oxygen, carbon dioxide is created when butane is completely burned.
Why do producers (plants) have an opportunity to thrive after wildfires?
Answer:
Thick bark.
Trees in fire-prone areas develop thicker bark, in part, because thick bark does not catch fire or burn easily. It also protects the inside of the trunk
Fire-induced sprouts.
This fire-survival strategy allows for the complete destruction of above-ground growth
How do make a sperm cell go in to a woman
Which purpose is the main function of the light-dependent reactions of photosynthesis?
Answer:
The overall purpose of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules. The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem.
The light-dependent reactions convert light energy into chemical energy. The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH. These two energy-storing molecules are then used in the light-independent reactions.
Most physical characteristics are inherited. Scientists have discovered several genes that contribute to human fatness, particularly genes that regulate the production of specific ____________ , such as ____________ , which stimulates hunger, and ____________ , which reduces hunger.
Answer:
hormones; ghrelin; leptin.
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
Heredity refers to the transfer of traits (specific physical characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, handedness, freckles, curly hair, color blindness, height, etc.
A gene can be defined as the complete set of hereditary instructions that is typically found in the deoxyribonucleic acid (DNA).
Over the years, scientists have discovered several genes that are known to contribute to human fatness (body weight), especially genes that are saddled with the responsibility of regulating the production of specific hormones, such as ghrelin, which stimulates hunger, and leptin, which reduces hunger.
A solid form of precipitation is _____________.
Answer:
precipitate
Explanation:
the examples would be; evaporation, snow, hail, or clouds.
Please help;
Given the range of current speeds shown on the graph above, would deposition ever be possible for clay (0.001 mm) or silt (0.01mm) particles?
Answer yes or no and explain your answer.
Answer:
Yes.
Explanation:
Yes, deposition can be possible for clay (0.001 mm) and silt (0.01mm) particles when the agent that carry its load is absent in that region such as wind. Wind is the agent that moves clay and silt particles with it so if there is high wind in a specific region, no deposition will occur while on the other hand, those areas where wind is not present, deposition will definitely occurs so we can say that deposition depends on the presence and absence of wind.
if you look away from this sentence and focus your eyes on a distant object, the eye muscles _______ to focus images on the retinas
If you look away from this sentence and focus your eyes on a distant object, the eye muscles relax to focus images on the retinas.
Locate each of the following general areas of your body as listed in the background by pointing to areas on your body in reference to body orientation terms. Become familiar with these terms so you can eventually recall their meanings without referring to the background.
a. Anterior
b. Caudal
c. Cephalic
d. Deep
Answer:
a. Anterior: Refers to the front of the body, which comprises the face and abdomen.
b. Caudal: Refers to the lower structures of the body, starting from the waist towards the foot.
c. Cephalic: Refers to the entire head region.
d. Deep: Refers to the inner core regions of the body, such as the bones within the muscle, the organs, among other internal structures.
Explanation:
The regions of the body presented above are very important for all health professionals, as it facilitates the study and understanding of the human body and the structures that make it up. In addition, the memorization of these terms allows health professionals to talk clearly about the injuries that patients have and the best way to treat them.
what is the waterfalls
Answer:
waterfall is a falling of a river or other body of water over a steep Rocky ledge. Shows interruption in water flow
Gene expression can be summarized as
DNA is translated to mRNA that is then transcribed to
make a protein.
O
DNA is transcribed to mRNA that is then translated to
make a protein.
Protein is translated to mRNA that is then transcribed
to make DNA.
mRNA is transcribed to DNA that is then translated to
make a protein.
Answer:
3 one
Explanation:
Which characteristic of a dog is inherited?
Barking
Doing tricks
Walking on a leash
Whining for food
Answer:
Barking is inherited characteristic of dog.
Explanation:
They inherit that from their ancestors.
Macronutrients is the most readily available for energy production
Answer:
The correct answer is - true.
Explanation:
All the macronutrients carbohydrates, fats, and protein all three produce energy. Carbohydrates are the most preferred source of energy for the human body as it is the macronutrient that your system most requires.
The human body easily breaks down most carbohydrates and provides a significant amount of energy. The energy-providing process is called cellular respiration starts with glucose as a substrate. Glucose is the simplest carbohydrate.
Los microondas tienen una frecuencia mayor a las ondas de radio. verdadero o falso,justifique
Verdadero.
→ Porque, los microondas con/y las radiofrecuencias son radiaciones electromagnéticas de mayor frecuencia.
SALUDOS!
MiraculousAlejandra
Help .....plz help....
Answer:
2. sedimentation (decantation follows sedimentation)
3. immiscible (water and oil never mix with each other)
4. size
5. evaporation (condensation chills the mixture where evaporation heats the mixture )
pls mark it as brainliest
Answer:
pls mark it as brainliest
sedimentation
immiscible
evaporation
pls mark it as brainliest
What happens when the density of a medium increases?
how do the decisons that we make each day influence how efficiently our body operates
Answer:
Our decisions have direct impact on the operations or actions of our body.
Explanation:
The decisions that we make each day greatly influence our body and efficiently our body operates because the activities we do in daily life put pressure on our body system. If our decisions force us to do hard work so it makes our body more stronger and healthier as compared to those decisions which requires no hard work so our body is not strong enough and our body can't operates efficiently.
All human impacts on the environment, such as the depletion of natural resources, are significantly worsened by __________. air and water pollution climate change human population growth agricultural practices
Answer:
overpopulation
Explanation:
this along with the others listed have triggered climate change and soil erosion
what happen to Potato chips when put into salt water?
Answer: the potato chip becomes a substance that is soft and very floppy
what is gestation period?
Answer:
gestation period is the period of development during the carrying of the embryo or fetus inside viviparous animals
2. What kind of plants contain tubular structures that are used to conduct water from the soil through the roots?
non-vascular plants
seedless plants
seed plants
vascular plants
Answer:
Vascular plants
Explanation:
I took the quiz
Part 1 of 1 -
Question 9 of 10
10 Points
When DNA is copied, sometimes there are mistakes. Approximately how often does this
happen?
O A. There aren't any mistakes.
OB. 1 in a billion bases.
OC. 1 in a million bases.
OD. 1 in a trillion bases.
Reset Selection
Answer:
D. 1 in a trillion bases
Explanation:
A mutagen agent can change the genetic information of organisms increasing mutations over the natural level. Mutagens cause changes in the bases, and pairing bases, that compose DNI strands.
A mistake in the process of DNI copy during cell division might cause genetic changes in daughter cells. Defects DNI replication might be inherited if it occurs in germinal cells. But it can also cause many significant epigenetic changes.
Many of these changes can be detected on time by enzymes such as DNI polymerase. This enzyme can correct these mistakes or at least some of them, moving from 3´to 5´direction, and eliminating the mistakes.
The highly effective replication system, together with the action of enzymes, makes it rare to occur a mistake in DNI replication. Generally speaking, the mistaken rates in DNI replication are very low, meaning that only one in a trillion times occurs a mistaken DNI copy.
Do you think that organisms of the same order will share a stronger evolutionary relationship than organisms that share only the same phylum? Explain your reasoning using the results of your investigation.
Answer:
In taxonomic, the organism is classified based on some similarities. ... But the organism with the same order should have the same phylum and class too since order is located below the phylum. That means the organism with the same order should have more similarities than the organism with the same phylum.Taxonomical classifications are done for organisms including plants, animals, microorganisms etc. It classifies, defines and scientifically names organisms.
According to the taxonomical classification the organisms are classified based on similarities and in order of the taxonomy, the organism should have the same phylum and class.
In taxonomy, the phylum is above the order in level and the phylum will have fewer similarities compared to the organism in order or class.
The organism of the same order will have a strong evolutionary relationship as compared to the organism with the same phylum.
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