Answer:
Within 24 hours after fertilization, the egg that will become your baby rapidly divides into many cells. By the eighth week of pregnancy, the embryo develops into a fetus.
Pls HELP ASAP !!!!!!!
Which organ is the site of gas exchange?
Answer:
lungs
Explanation:
lungs
During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
The lungs exchange gases
Describe where genes are located and the function of genes.
According to the research, genes are structures located in the chromosomes whose function is the storage of genetic information.
What are genes?It is the minimum unit of genetic information that contains the DNA of a living being.
They are found within the chromosomes and each gene occupies a specific position, called a locus, which encodes a specific functional product, such as a protein.
Therefore, we can conclude that according to the research, genes are structures located in the chromosomes whose function is the storage of genetic information.
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Most falcons, a type of bird, lay two to four eggs at a time. Those falcons that produce fewer or more than this have reduced fitness. Which of the following selection best describes this?
a. directional selection
b. disruptive selection
c. stabilizing selection
Answer: C. Stabilizing selection
Explanation:
What is the term for the disease whose symptoms includes pallor, shortness of breath, infection, bleeding gums, predominance of immature and abnormally functioning lymphocytes in a young child
Answer: acute lymphoid leukemia
Explanation: Acute lymphoblastic leukemia is the most common childhood cancer. It occurs when a bone marrow cell develops errors in its DNA.
Symptoms may include enlarged lymph nodes, bruising, fever, bone pain, bleeding from the gums, and frequent infections.
Describe what brownfields are and how they can be assessed.
Brownfields are abandoned or commercial properties that are contaminated with hazardous substances or pollutants.
What are brownfields?Brownfields are perceived as too risky to redevelop due to cleanup costs and other legal issues. The assessment of brownfields involves a multi-step process including site investigation, risk assessment, and cleanup planning.
Site investigation involves the gathering of information about the history, current conditions, and potential contaminants of the property, which involve reviewing records, conducting sampling and analysis of soil, groundwater, and other environmental media.
Risk assessment involves the evaluation of the potential risks associated with the contaminants and determining the cleanup level needed to protect human health and the environment. Cleanup planning involves the development of a strategy to address the contamination, which may include remediation, monitoring, etc.
Therefore, the brownfields are assessed through a combination of site investigation, risk assessment, and cleanup planning to help in the redevelopment of underutilized properties.
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Explain why scientists classify organisms and how scientists classify species.
Answer:
-Scientists classify living things to organize and make sense of the incredible diversity of life.
-they do on the basis of shared physical characteristics. They place them in a hierarchy of groupings, beginning with the kingdom animalia and proceeding through phyla, classes, orders, families, gender and species.
The table below shows the characteristics of four pathogens.
Pathogen
Genetic material Nucleus?
Outer Covering
Can replicate on its own?
1
DNA
No
Cell wall
Yes
2
DNA
Yes
Cell membrane
Yes
3
DNA
No
Protein capsule No
4
DNA
Yes
Cell wall
Yes
Which pathogen is most likely a virus?
Choose 1 answer:
Pathogen 1
Pathogen 2
Pathogen 3
Pathogen 4
Pathogen 3 will most likely be a virus with the features seen in the table.
What is a Pathogen?This is defined as disease causing microorganism and examples include bacteria, virus etc.
Virus doesn't replicate on its own but only when in the living cells of other organisms and has a protein capsid but lacks nucleus.
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Answer: CORRECT (SELECTED)
Pathogen 3
Explanation:
Pathogen 3 has a protein capsule covering and is unable to reproduce on its own
clear cutting can cause the erosion of
Answer:
Explanation:
Answer: Increases the risks of soil erosion.
clear cutting can cause the erosion of Increases the risks of soil erosion.
could someone help mee?
Answer:
I think the are saying add up the traits
Answer:
Where the arrow is pointing is where the nutrients are going. For example, the nutrients from the bird go to the fungi.
Explanation:
How does meiosis reduce the number of chromosomes contained in a cell?
A. The cell divides once without replicating first.
B. Meiosis is a two-step process, and the cell divides twice.
C. Half the chromosomes are destroyed when the cell divides.
Answer:
A
cell division makes the number of chromosomes get reduced to only a half of the original
Answer:
B Meiosis is a two-step process, and the cells divide twice
Explanation:
Tried A on my test and was wrong. B was correct
Consider the following experiment. A healthy plant is placed in a sealed container overnight, when the plant is in darkness. The concentration of oxygen in the trapped air is measured at the start of the night and again in the morning.
Predict whether you expect there to be more or less oxygen in the container in the morning, or the same? Explain why.
I expect to see less oxygen in the container in the morning because plants consume oxygen at night.
What is cellular respiration?Cellular respiration is the process by which organisms consume oxygen and generate carbon dioxide.
During the night, a plant can consume oxygen and release carbon dioxide in this process (respiration).
In conclusion, I expect to see less oxygen in the container in the morning because plants consume oxygen at night.
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both 10 and 11 please i need the answers thankyou
Answer:
10. Amoeba, Paramecium and Algae all contain storage vacuoles.
11. Water and food sources
Hope this help
natural selection is the changes of size and shape of living things in
Answer:
natural selection is the changes of size and shape of living things in their body or body skeleton
Whose cell does not have a cell wall ? a) human b) algae c) plants d ) bacteria
with explanation .
Human
animals always move, they are not static in one particular place, therefore they need to be flexible. Therefore additional layer i.e cell wall is not required
Why would someone living in Zone 3 (last frost date is late
May) or Zone 4 (last frost date is early June) decide to plant
seedlings, which are young plants grown indoors from
seeds, rather than seeds directly into the ground?
1. (b) Where does the light independent phase of photosynthesis occur?
Explanation:
The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose. The chloroplast's own genetic material (separate from that of the cell) is also stored in the stroma.
How do we ensure that society appreciates the full importance of plants?
Answer:reasoning
Explanation:People will learn the importance of plants through reasoning and visual knowing that plants help provide oxygen and remove CO2 such as trees, and plants help and benefit mental help
By reasoning and spreading awareness
Plants provide us OxygenThey are responsible for rain They absorb carbon dioxide from air.If we can spread awareness among the people about the importance then it can be successful
1. (c) How would the results of the experiment have differed if proteins carried the genetic information?
Answer:
in the qoridndt plan it woud grap diferint
Explanation:
bacterial lipopolysaccharide causes which type of reaction?
:
Lipopolysaccharides (LPS) are one of the main causes of systemic, low-grade inflammation!
!
Bacterial lipopolysaccharide (LPS) can cause an inflammatory reaction.
LPS is a component found in the outer membrane of Gram-negative bacteria. When released or exposed to the immune system, LPS can trigger a strong immune response and induce inflammation.
LPS activates the innate immune system through the recognition of specific structures within LPS by immune cells, particularly toll-like receptor 4 (TLR4).
Activation of TLR4 initiates a signaling cascade that leads to the production and release of various pro-inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1), and interleukin-6 (IL-6). These cytokines contribute to the initiation and amplification of the inflammatory response.
The inflammatory reaction caused by LPS can result in symptoms such as fever, increased vascular permeability, activation of immune cells, and the release of other inflammatory mediators. In severe cases, excessive or uncontrolled immune response to LPS can lead to systemic inflammatory response syndrome (SIRS) or sepsis, a life-threatening condition.
In summary, bacterial lipopolysaccharide (LPS) causes an inflammatory reaction by activating the immune system and triggering the release of pro-inflammatory cytokines, leading to inflammation and associated symptoms.
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Which of the statements best describes the way you would engineer bacterial cells to produce a human protein?.
Answer:
Which of the following BEST describes the way you would engineer bacterial cells to produce a human protein? Use restriction enzymes to cleave both the donor DNA and the vector DNA.
How have speciation events led to great biodiversity?
The half-life of chromium 51 is 28 days if the sample contained 510 grams how much chromium would remain after 112 days
Answer:
7.97 grams would remain after 112 days
The diagrams A and B below show a student moving the same boxes in
two different ways. In diagram B, the student is using wheels, which are
part of a simple machine.
It will be easier for the student to use wheels to push the boxes in
diagram B because there is
(A) less mass
(B) less friction
(C) more gravity
(D) more erosion
can u pls help me gosh 17 if u get it right
Answer:
The Answer is b
Explanation:
Chromosomes are duplicated.
2. What do humans require freshwater for and what will happen if we deplete freshwater resources?
Answer:
We need freshwater for basic needs, such as bathing, and drinking. Withtout freshwater the world will die off, as we need water to survive. if we deplete the world will start losing water, therefore sending world into a panic.
Explanation:
Define the term resolving power
For a fictional neuron, the nernst potential of the mg2+ ion is +30 mv. given this information, where is the ion more highly concentrated? mg2+ is at a higher concentration inside the cell mg2+ is at a higher concentration outside the cell there is not enough information to determine the answer unanswered
From the nernst potential given, the mg2+ ion is at a higher concentration outside the cell.
What is nernst potential?
The potential across the cell membrane that exactly opposes net diffusion of a particular ion through the membrane.
The nernst potential of an ion is calculated as follows;
[tex]E = \frac{RT}{zF} ln[\frac{ion \ outside \ cell}{ion \ inside \ cell} ][/tex]
The given nernst potential of mg2+ ion is +30 mv = +0.03 V, (positive volt).
A positive log can only be obtained when the numerator (ion outside cell) is greater than the denominator (ion inside cell).
Thus, from the information given, the mg2+ ion is at a higher concentration outside the cell.
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Neuroaesthetics measures how the brain processes what?.
Answer:
Neuroaesthetics is a field of experimental science that aims to
combine (neuro-)psychological research with aesthetics by
investigating the "perception, production, and response to art, as
well as interactions with objects and scenes that evoke an intense
feeling, often of pleasure.".
what is the main purpose of the human genome project?
a.to find dna in a cell
b.to find lost dna
c.to create new genes
d.to map all base pairs in dna
Answer:
d. to map all base pairs in DNA
