Answer:
repeat the experiment again.
Answer:
repeat the experiment again
plzzz mark me the brainliest
Which of these claims is supported by scientific evidence?
Answer: in the last 10 years, sea level has risen twice as fast as in previous centuries
Explanation:
Mutagens increase the amount of damage to dna. True or false?
Final answer:
It is true that mutagens increase the amount of DNA damage. While not all mutagens cause cancer, those that do are termed carcinogens. Mutations can be beneficial or harmful, and the body has repair mechanisms, although some damage may be irreversible.
Explanation:
It is true that mutagens increase the amount of damage to DNA. Mutagens are various agents that can cause changes in the DNA sequence, referred to as mutations. While not all mutagens are carcinogenic (cancer-causing), those that increase the risk of cancer are known as carcinogens. For example, tobacco smoking is linked with lung and bladder cancers, while asbestos exposure is associated with mesothelioma.
An example of a beneficial mutation could be one that increases resistance to a particular disease, while a harmful mutation could result in a genetic disorder such as cystic fibrosis. Exposure to mutagens like cigarette smoke can lead to cancer because they can induce changes in DNA that disrupt normal cellular functions and can lead to uncontrolled cell growth. Mutations are not always caused by toxic substances; they can also occur spontaneously due to errors during DNA replication or cell division. Some mutations can indeed make chromosomes longer or shorter, affecting the genetic information contained within.
The body does have DNA repair mechanisms to correct many of the errors introduced during DNA replication. However, if the damage is not repaired or is repaired incorrectly, it can lead to mutations. Over time, the accumulation of such mutations can contribute to aging and the development of age-related diseases.
If a cell loses control of gene expression what happens?
Answer:
Abnormal, unhealthy cells will develop.
Which piece of evidence from the passage supports the theory that humans may not have been responsible for the extinction of the woolly mammoth?
A.discovery of sites of mass mammoth kills
A.
discovery of sites of mass mammoth kills
B.a land bridge that connected Asia to North America
B.
a land bridge that connected Asia to North America
C.discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago
C.
discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago
D.carbon dating that indicates the mammoths died between 13,000 and 15,000 years ago
D.
carbon dating that indicates the mammoths died between 13,000 and 15,000 years ago
The discovery of ancient mammoth DNA dating to 10,500 years ago indicates that woolly mammoths survived beyond the time of significant human influence, suggesting that other factors may have driven their extinction.
Explanation:The piece of evidence from the passage that supports the theory that humans may not have been responsible for the extinction of the woolly mammoth could be C. the discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago. This evidence indicates that woolly mammoths survived beyond the time when humans grew in number and began to have a substantial impact on their environment. This suggests that other factors - such as rapid climate change or disease - may have played a significant role in the mammoths' extinction.
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Natural selection changes allele frequencies because some _______ survive and reproduce more successfully than others.
Answer:
E) individuals
Explanation:
The blind spot is located in the area of the retina
Answer:
true
Explanation:
Answer:
where the optic nerve leaves the eye
Explanation:
The ______ period ended in the greatest extinction of the phanerozoic eon.
Answer:
The Permian period ended in the greatest extinction of the phanerozoic eon.
Final answer:
The greatest extinction of the Phanerozoic Eon occurred at the end of the Permian period, known as the Permian extinction. It resulted in the loss of a significant amount of marine and terrestrial species. Volcanic activity and global warming are believed to have played a role in this mass extinction event.
Explanation:
The greatest extinction of the Phanerozoic Eon occurred at the end of the Permian period, which is part of the Paleozoic Era. This extinction event, known as the Permian extinction, was the largest in Earth's history, resulting in the loss of approximately 96 percent of marine species and 70 percent of terrestrial species. It is believed that widespread volcanic activity and a runaway global-warming event contributed to this mass extinction.
The dense layer of connective tissue that surrounds an entire skeletal muscle is the
Answer:
The endomysium is the connective tissue that surrounds each muscle fiber (cell).
Hope this helps!
The epimysium is the dense layer of connective tissue that surrounds an entire skeletal muscle. This tissue protects and supports the muscle fibers within.
Explanation:The dense layer of connective tissue that surrounds an entire skeletal muscle is the epimysium. In the muscular system, there are multiple layers of connective tissue that serve different purposes. For instance, the endomysium surrounds individual muscle fibers, the perimysium encloses bundles of these fibers, and the epimysium wraps around the entire muscle. Just as the name suggests, 'epi-' means outer or outside, hence, epimysium refers to the outermost layer of connective tissue. Its main function is to support and protect the muscle fibers within.
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Radial (lateral) and ulnar (medial) collateral ligaments restrict side-to-side movements of the __________ joint.
Answer:
Elbow joint
Explanation:
The elbow joint is a type of hinge joint formed by the trochear groove at the distal end of humerus where it fits into the trochlear notch formed by ulna and radius. The olecranon process prevents the lower arm from over-stretching.
The muscles which operate the joints are in pairs and antagonistic. The muscle that straightens the limb is called the extensor muscle.
Radial (lateral) and ulnar (medial) collateral ligaments restrict side-to-side movements of the elbow joint.
Radial collateral ligaments provide crucial stability to the elbow joint, preventing excessive lateral or medial deviation of the forearm bones (radius and ulna) in relation to the humerus.
The radial collateral ligament, located on the lateral aspect of the elbow, serves to stabilize the joint against varus forces, limiting excessive lateral deviation of the forearm. Similarly, the ulnar collateral ligament, positioned on the medial side of the elbow, provides stability against valgus forces, restricting excessive medial deviation of the forearm.
The coordinated action of these ligaments ensures the maintenance of proper joint alignment and function, facilitating the smooth execution of various upper limb movements while protecting the integrity of the elbow joint and minimizing the risk of injury or instability during physical activities.
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Amy got up late this morning so she skipped breakfast and went straight to her soccer practice. which fuel source is her body relying upon to supply the glucose that her brain needs to function?
The method by which new genes can be acquired by successive generations: multiple choice.
is called mitosis
is called meiosis
is sexual reproduction
is fertilization
is by mutations
has been imagined as evolution theory
has never been documented by the scientific method
is known as genetic recombination
I have mutations and mitosis already, anybody know any more to add.
Answer:
Is called mitosis.
Explanation:
Abnormal cell division in mitosis. Because the genes contained in the duplicate chromosomes are transferred to each successive cellular generation, all mitotic progeny are genetically similar.The method of new genes can be acquired by mitosis.
How many amino acids cannot be made by the body
Answer:
20
Explanation:
There you go!
Susan is conducting an experiment to see if plants will grow better with application of fertilizer. She separates 50 plants into two groups of 25. One group receives a liquid fertilizer when watered every other day, and the other group receives only water on the same days. The plants are kept in a greenhouse with constant and equal amounts of sunlight, and a constant temperature. She measures the plants once a week for 12 weeks. At the end of 12 weeks, the plants with the fertilizer grew an average of 9 inches, and the ones that were not given the fertilizer grew an average of 5 inches. In this scenario, the plants that received fertilizer are the __________ group, and the plants that did not receive fertilizer are the ____________ group.Contro
Answer:
First blank: Experimental or test
Second blank: Control group
Explanation:
To distinguish control versus experimental group just remember that in a control group the independent variable is controlled or held constant. In the experimental group the independent variable is changed.
In other words, the experimental group is the group that receives the treatment, or test.
This type is done to isolate the effects of the independent variable. What happens all variables in both groups are kept the same. The only difference is the independent variable should change in one to reliably determine whether the changes in the dependent variable(in this case plant growth) was caused by the independent variable (fertilizer).
Answer:
The correct answer will be option-
1. The experimental group
2. The control group
Explanation:
In the given question the key variable to be studied or independent variable is the application of the fertilizer. A scientific experiment is designed in a way that the samples must be grouped into two categories: the experimental group and the control group.
The experimental group is the group which receives the key variable to be tested which is the fertilizer. So the samples which received the fertilizer belongs to the experimental; group.
The control group is the group of samples which lacks the key variable to be studied, so the samples which did not receive any fertilizer will be considered a control group.
Which is the best hypothesis for the scientific question "how does light intensity affect the rate of photosynthesis"?A) light intensity, co2 concentration, and temperature are factors that determine the rate of photosynthesis.B) light intensity has no effect on the rate of photosynthesis.C) if the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease.D) light intensity has an impact on the rate of photosynthesis.
Answer:
D
Explanation:
A hypothesis is based on assumptions. Assumptions, on the other hand, are developed from the limited evidence available. In this case, it can be rightly assumed that light intensity has an impact on photosynthesis based on what is observed in the environment. However, to prove or disapprove the hypothesis, controlled experiments need to be conducted.
A good hypothesis is also simple and clear.
Answer:
It would be c If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease.
Explanation:
What is the most abundant vertebrate on earth?
Select the correct statement about chemical energy, a term used by biologists to refer to potential energy available for release in a chemical reaction. When a glucose molecule is metabolized to CO2 and H2O, chemical energy is lost. Light energy is converted to chemical energy during photosynthesis. A photosynthetic cell within a plant leaf produces chemical energy, stored within glucose molecules
Answer:
Light energy is converted to chemical energy during photosynthesis
Explanation:
Light energy in the form of photons is harnessed by a protein chain molecule in photosystems (I & II) in the chlorophyll pigments of plants. This energy is used to split a water molecule and the subsequent H+ are used to reduce CO2 into carbohydrates. Therefore, this light energy is stored in the chemical bonds of glucose and carbohydrates. This energy is thereafter used in cellular respiration where these bonds are broken and the energy used to make ATPs (the energy currency molecule of the cell).
Chemical energy is potential energy stored in molecular bonds, released during chemical reactions such as cellular respiration. Light energy is transformed into chemical energy during photosynthesis, and the cycle of energy transformation continues as organisms harvest energy from glucose, with ATP acting as the energy currency in cells.
Chemical energy is a form of potential energy that is stored in the bonds of molecules and released during chemical reactions. The correct statement regarding chemical energy is that light energy is converted to chemical energy during photosynthesis. In this process, plants capture sunlight and use it to transform carbon dioxide and water into glucose, storing the energy in its chemical bonds.
When organisms, such as bacteria, plants, and animals consume glucose during cellular respiration, the bonds are broken and energy is released. Oxygen is required for this process, with carbon dioxide and water being the byproducts, which in turn are used by plants to conduct photosynthesis, creating a cycle of energy transformation. Moreover, some of the released energy is trapped in adenosine triphosphate (ATP), which can then be used by cells to drive other energy-requiring reactions.
Another example of chemical energy utilization is in our muscle cells. When muscles do work, glycogen is broken down into glucose, with the subsequent release of energy to the muscle fibers, while some is lost as heat to the surroundings.
The traits that did not show up in the F1 generation of Mendel's experiments but reappeared in the F2 generation are best described as____.
A. Alleles
B. Mendelian
C. Recessive
D. Dominant
Answer:
Recessive
Explanation: A P E X verified
In the _______ cycle, a virus integrates its DNA into the host's DNA, and its DNA is replicated when the host DNA is replicated.
A. lysogenic
B. infectious
C. retroviral
D. lytic
Answer:
The correct answer is option A. "lysogenic".
Explanation:
During a viral infection, the virus uses different cycles of reproduction to achieve its goal of replicating itself inside a host organism. In the lysogenic cycle the virus integrate its DNA into the host genome, using the host replication system to replicate its own DNA along with the DNA of the host. During this cycle the host continues to live and reproduce normally as no pathogenicity is still evident from the virus.
which of the following undergo photosynthesis?
A.animals and plants
B.only plants
C.humans and animals
D.only animals
Answer:
B.only plants
Explanation:
Only plants undergo photosynthesis.
Which of the following is NOT one of the basic functions performed by the nervous system?
sensory input
integration
developmental growth
output
Answer:
developmental growth would be the answer
Answer: Developmental Growth
Explanation:
The nervous system of the body is known for the conduction of message from brain to various parts of the body.
It includes, input, integration and out. Developmental growth is mainly controlled by growth hormones which is secreted from the pituitary gland.
This is not a basic function of nervous system, it is a function of endocrine glands.
A researcher wonders whether an acidic environment affects the growth of frogs. She varies the pH in five different tanks containing ten tadpoles each, and measures the length of the frogs after one year. All frog tanks are provided the same amount of food. What is the dependent variable in this experiment?
a. pH of the tanks
b. number of tanks
c. amount of food
d. length of frogs
Answer:
answer choice is A.
Explanation:
your welcome :)
Energy for use in cells is stored in form of 1.chemical bond energy 2.physical energy 3.heat energy 4.mechanical energy.
Answer:
pretty sure its 1
Explanation:
Energy for use in cells is stored predominantly in the form of chemical bond energy. When chemical bonds are broken, like in metabolism of glucose, stored energy is unlocked and utilized. Other forms of energy - mechanical, heat, radiant, and electrical - are involved in energy conversions but not typically stored in the same way.
Explanation:In the context of cell function, energy is primarily stored in the form of chemical bond energy. For instance, chemical energy, a type of potential energy, is stored in molecules like glucose in our cells. When the chemical bonds of glucose are broken down in a process called metabolism, this stored energy is released and used by the cells. This is unlike mechanical, heat, or physical energy, which are involved in energy transformations but not typically stored for use by cells.
It's important to note that mechanical energy powers physical activity while radiant energy is emitted as waves such as in sunlight and heat energy is generally involved in substance conversion. Electrical energy, on the other hand, is the power of moving electrons.
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Which of the passages from lincoln's gettysburg address uses logic and reason?
A.we have come to dedicate a portion of that field
B.the brave men,living and,dead who struggled here
C.here gave the last full measure of devotion
Answer:
B.the brave men,living and,dead who struggled here
Explanation:
Answer:
B. the brave men, living and, deaf who struggled here
Which distribution pattern do the oyster larvae exhibit?
A) Stationary
B) Uniform
C) Clumped
D) Random
NEED HELP!!!! FASTT!!!!!!!!!
Oyster larvae exhibit Stationary distribution pattern.
How long do oysters take to grow?It takes 18 to 24 months for oysters to become adults or grow to market size, approximately 3 inches.
What is the lifecycle of an oyster?The oyster becomes a juvenile at one year of age, and officially becomes an adult at year three. Oysters typically grow up to an inch per year.
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A family has seven sons. The chance that their eighth child will be a daughter is _____. One chance in seven, one chance in eight, one chance in two, practically none
Answer:
they have 7 boys so i would say 1in 8 chance
Explanation:
White-headed woodpeckers are adapted to have strong beaks that can break into tree trunks to find bugs and can also open pine cones to get at the seeds.
White-headed woodpeckers are best adapted to living in the biome.
Answer:
The correct answer will be-temperate rain forest.
Explanation:
The white-headed woodpecker is the only bird of North America which are best adapted to dig the trunks of the pine cones through their strong beaks.
These beaks mostly breed and live in the temperate forest which broad-leaf and coniferous forests. These forest heavy rainfall and are wildlife-rich found in regions like Canada.
Thus, the temperate rain forest is the correct answer.
Present time is part of the Mesozoic Era.
Question 7 options:
True
False
Answer:
false
Explanation:
Answer:
false
Explanation:
its obvi
How does the biosphere interact with the atmosphere
As all the spheres, the biosphere and the atmosphere are in constant interaction with each other. The atmosphere is the sphere made out of gases, while the biosphere is the sphere made out of all the living organisms. The living organisms use the gases from the atmosphere for their functioning. As they use them, they either store them, release them as waste products, or change them. Once their usage is finished, the biosphere releases the majority of the gases back to the atmosphere, being also able to influence its composition on the long run. An excellent example of the interaction between the biosphere and the atmosphere, as well as the effect that it can have, is with the emerging of the cyanobacteria. The cyanobacteria used the carbon dioxide from the atmosphere for the process of photosynthesis. By using the carbon dioxide, the cyanobacteria has reduced the amount of this gas in the atmosphere. On the other hand, once used, the atom of oxygen from the carbon dioxide has been released into the atmosphere, gradually resulting in an increase in the oxygen levels in the atmosphere, making it the second most present gas in it. That resulted into enabling living conditions for other organisms to evolve and develop, and the circle has been continuing ever since.
The biosphere interacts with the atmosphere through processes like photosynthesis, respiration, and climate regulation.
The biosphere refers to the part of the Earth where life exists, which includes the atmosphere, lithosphere (Earth's crust), and hydrosphere (water bodies). The interaction between the biosphere and the atmosphere is crucial for various processes. For example, plants in the biosphere undergo photosynthesis and release oxygen into the atmosphere, while animals in the biosphere consume oxygen and release carbon dioxide.
Additionally, the atmosphere provides gases that are vital for the biosphere. For example, carbon dioxide in the atmosphere is used by plants during photosynthesis, and oxygen in the atmosphere is utilized by animals for respiration. The biosphere and atmosphere also have a reciprocal relationship in terms of climate regulation. The biosphere influences the atmosphere through processes like transpiration, which affects humidity and precipitation patterns, while the atmosphere impacts the biosphere through weather events such as droughts or hurricanes.
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You are responding to a call where an 8-year-old has been stung by a wasp. his skin is pale with patches of raised red spots on his hands, arms, and face. these spots are most likely what?
Answer:
an allergic reaction to the wasp bite
Explanation:
this happens when a wasp first stings u it's only temporary of course
Graphs are _____ of relationships.
Answer:
Diagrammatic representation
Explanation:
Graphs are diagrammatic representation of relationships.
Answer:
Geometrical representation
Explanation:
Graphs are geometric representations of relationships presented through a data set used to facilitate understanding of the information presented in that set. Charts help you quickly identify patterns, verify results, and compare measurements. In addition, they can be used in many ways and in different areas of knowledge.