Answer: The final population of Proteus vulgaris after 6 hours is [tex]3.71\times 10^{6}cells[/tex]
Explanation:
We are given:
Proteus vulgaris divides and doubles every 28 minutes
Total time given = 6 hours = 360 min (Conversion factor: 1 hr = 60 min)
Number of times Proteus vulgaris doubles in 6 hours = [tex]\frac{360min}{28min}=12.857times[/tex]
Calculating the number of bacteria after 6 hours under ideal conditions:
We are given:
Initial population = 500 cells
Number of times it doubles = 12.857 times
Final Proteus vulgaris population = [tex]500\times 2^{12.857}=3709476.8=3.71\times 10^{6}cells[/tex]
Hence, the final population of Proteus vulgaris after 6 hours is [tex]3.71\times 10^{6}cells[/tex]
How do transitional fossils help explain the evolutionary steps that took place to produce modem organisms?
Answer:
Transitional fossils show how a particular taxa accumulated adaptations to fit particular environments and/or ecological niches
Explanation:
Transitional fossils are fossilized remains of taxonomic groups/species that illustrate an evolutionary transition between a known version of a taxa/species and the current taxa/species. Transitional fossils are fundamental because they can be clearly differentiated from the ancestral group as well as of its derived descendant group. For example, there exist transitional fossils known as "mammal-like reptiles"(i.e., therapsids that gave rise to the true mammals), which are clearly different from current mammals.
i)
State why the cobalt chloride paper is kept in a jar with a ground glass
stopper
Answer:
bcz it is harmful for human body
Explanation:
Why do some people argue that scientists should not use embryonic stem cells in medical research?
A. They think research conducted on these stem cells is not applicable to adults.
B. They think the use of these stem cells is too expensive.
C. They think the use of these stem cells is the same as ending a life.
D. They think research conducted on these stem cells is too difficult.
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D. They think research conducted on these stem cells is too difficult.
They argue because they think the use of these stem cells is the same as ending a life. Therefore, option C is correct.
This viewpoint is rooted in ethical and moral concerns. Embryonic stem cells are obtained from human embryos, usually from unused embryos created during in vitro fertilization (IVF) procedures. Opponents argue that using these stem cells for research purposes involves the destruction of potential human life since the embryos are destroyed in the process of harvesting the cells.
The ethical debate surrounding embryonic stem cell research centers on the question of when life begins and whether it is ethically justifiable to use human embryos for scientific purposes.
Learn more about stem cells, here:
https://brainly.com/question/11161299
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Nonrenewable resources are those that cannot be replaced faster than they are used up by human populations. Do you think the resources you read about in this activity are nonrenewable? Explain why.
Answer:
first of all non renewable energy or resources is s energy or resources that can last for a particular time . such resources are depleted and cannot be replenished as the are used.
Explanation:
I think so because it is been recharged. e.g the phone been used is recharged or powered through electricity which can also be powered through waves of water from dams( kanji dams)
Osmolarity tells you the concentration of solute particles in solution, osmolarity cannot always tell you the direction of water movement across a membrane.
a. True
b. False
Answer:
a. True
Explanation:
Osmolarity is a measure of solute concentration, that is, it indicates how much solute there is in a liquid. As we know, osmosis is the movement of solute across the cell membrane, where the solute passes from the more concentrated side to the less concentrated side. Osmolarity is directly linked to this concept, but it is not able to indicate the direction of movement of the solute. This is because the solute will only pass through the membrane if it is a penetrating solute. Non-penetrating solutes do not have the ability to move through the membrane, even though the osmolarity of the liquid is high.
the point when cytoplasm just start diffusion to separate from cellwall is
Answer :
Maybe Plasmolysis...
Which of these occurs in the first trimester of human pregnancy?
A. The fetus accumulates fat under its skin.
B. The fetus's lungs become fully developed.
C. The fetus is able to move its limbs.
D. The fetus becomes medically viable.
Answer:
i think its probably A
Explanation:
the first trimester is when the fetus enters a stage of rapid development. forming most organs, facial features, skeletal tissue, and limbs. So its either A or B. But i dont think the lungs are fully developed yet so i would choose A. hope this helped
What is the kind of asexual reproduction
Your considering career options in health field which of the following would focus on performing medical test on animals
Answer: Become a veternarian.
why do many RNA viruses commonly demostrate antigen drift?
Answer:
:D
Explanation:
2. Is caffeine really a source of energy
Answer
Yes i believe so
Explanation:
A chain of monosaccharides is called a _________.
A. quasi-saccharide
B. multisaccharide
C. polysaccharide
D. glucose molecule
Answer:
C. polysaccharide
Explanation:
^_^^_^^_^
While alive, an organism absorbs (radioactive) carbon 14 at such a rate that the proportion of carbon 14 in the organism remains at a known constant level. When it dies, it no longer absorbs carbon 14, so its proportion of carbon 14 begins to decrease. The half-life of carbon 14 is 5,600 years. A human skeleton is discovered whose level of carbon 14 is 15% that of a living human. To the nearest 100 years, how long ago did the person die
Answer:
The person has been dead for approximately 15,300 years
Explanation:
Available data:
The half-life of carbon 14 is 5,600 yearsThe human skeleton level of carbon 14 is 15% that of a living humanTo answer this question we can make use of the following equation
Ln (C14T₁/C14 T₀) = - λ T₁
Where,
C14 T₀ ⇒ Amount of carbon in a living body at time 0 = 100%C14T₁ ⇒ Amount of carbon in the dead body at time 1 = 15% λ ⇒ radioactive decay constant = (Ln2)/T₀,₅T₀,₅ ⇒ The half-life of carbon 14 = 5600 yearsT₀ = 0T₁ = ???Let us first calculate the radioactive decay constant.
λ = (Ln2)/T₀,₅
λ = 0.693/5600
λ = 0.000123
Now, let us calculate the first term in the equation
Ln (C14T₁/C14 T₀) = Ln (15%/100%) = Ln 0.15 = - 1.89
Finally, let us replace the terms, clear the equation, and calculate the value of T₁.
Ln (C14T₁/C14 T₀) = - λ T₁
- 1.89 = - 0.000123 x T₁
T₁ = - 1.89 / - 0.000123
T₁ = 15,365 years
The person has been dead for approximately 15,300 years
Luke was Isked to find the median of the following
numbers:
16, 24, 12, 7, 30, 11,22
The work below shows the steps he used.
X X 16 22 24 30
What error did Luke make?
O He forgot to put the numbers in order first.
O He crossed off the low and high pairs incorrectly.
O He left out a number when putting the numbers in
order.
O He did not make an error.
16 + 22 = 38
2 2
16 22 = 38
19
Answer:
He left out a number when putting the numbers in order.
Explanation:
To find the median of a set of numbers, first arrange the numbers in order from least to greatest. Then begin crossing numbers of from each side at the same time.
Luke did not cross numbers off from each side, but only crossed them off from the left side. He also skipped a number, given there are only 2 "X's."
The list should look like so:
7, 11, 12, 16, 22, 24, 30
There should be three numbers before 16, not two as he has listed.
describe the internal diameter of the aorta.
Answer:
In sonographic measurements performed in the transverse view, the diameter of aorta (Ao) constituted 15.7 mm, the longer dimension of the inferior vena cava (IVC1) equaled 28.4 mm and the shorter one (IVC2) – 15.5 mm. In the longitudinal view, Ao equaled 15.3 mm and IVC – 18.8 mm (tab.
Now differentiate between laws and theories
Answer:
laws are so far permanent and can be amended, other-wise they can't be removed
theories, are different, theories are just theories that are ready to become something like a law, it is still in testing mode, it is like a bill in terms of law and has a possibility to become a passed law, just needs more hypothesis's and conclusions
Explanation:
law = law that is passed
theories = bills in law
Complete each of the sentences with the correct word or words regarding the function and structure of nails.
a. Nails are a scalelike modification of the __________layer of the _________
b. Nails form on the _______edges of the fingers and the toes.
c. Fingernails _________digits from damage protect the
1. stratum corneum
2. do
3. dermis
4. do not
5. ventral
6. epidermis
7. dorsal
Answer:
a. nails are a scalelike modification of the stratum corneum layer of the epidermis
b. nails form on the dorsal edges of the fingers and toes
c. fingernails do protect the digits from damage
Explanation:
The stratum corneum consists of the top layer of the epidermis (i.e., skin). Nails represent a modification of the epidermis and they are composed of densely packed dead skin cells (keratinocytes), which are rich in a protective protein called alpha-keratin. The nail plate is the hard keratinized part of the nail. The nail bed is the skin underneath the nail plate. The nails grow from the proximal portion of the nail bed, which is known as the nail matrix. The main function of the nails is to protect the tips of fingers and toes from injury.
hi im new just joined
The caterpillar, which is the larval stage of a butterfly, is very different from its adult form. Which phenomenon is responsible for this difference?
A. metamorphosis
B. regeneration
C. alternation of generation
D. molting
Metamorphosis IIRC, hope this help
Answer:
A
Explanation:
Metamorphosis is the process when large biological changes can occur like the transition from caterpillar to butterfly.
State three different information about zygote.
Answer:
A zygote is the union of the sperm cell and the egg cell . Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo.
Explanation:
Which type of process occurs in the absence of oxygen?
cellular respiration
photosynthesis
fermintation
all of the above
photosynthesis prosecss in the absence of oxygen
a) Identify where exocytosis begins in this pathway.
How is the protein transported out of the cell?
Answer:
Protein cargo moves from the ER to the Golgi, is modified within the Golgi, and is then sent to various destinations in the cell, including the lysosomes and the cell surface. The Golgi processes proteins made by the endoplasmic reticulum (ER) before sending them out to the cell.
explanation:
correct me if I'm wrong (◍•ᴗ•◍)
Which bone is identified in the picture below?
O A. Cranium
O B. Radius
C. Metacarpal
D. Sternum
Answer:
B) Radius
Explanation:
By the way for some people this question will have different answers so.. yeah
The growth of the human population directly relates to the use of natural resources by humans. Based on the graph, which two statements about human use if natural resources are most likely true?
A. resources use by humans will be higher in 20 years than it is now
B. resource used by humans is much higher now than it was 200 years ago
C. Resource used by humans in steadily decreasing over time
D. Resource used by humans is about the same now as it was 150 years ago
Answer:
A. resources use by humans will be higher in 20 years than it is now
B. resource used by humans is much higher now than it was 200 years ago
Explanation:
The growth of the human population has direct relation with the use of natural resources by humans means if the population of humans increases, more natural resources will be consumed by the population. Directly relation means if one increases the other automatically and vice versa. more population needs more resources for their growth and survival so we can conclude that resources used by humans will be increases if the population increases.
Andrew is trying to identify an unknown element. The element is dull and
brittle, and it is a poor thermal and electrical conductor. Where on the periodic
table is this element most likely found?
Answer:
non metals
Explanation:
When crossing a true breeding white mouse with a true breeding brown mouse your friend tells you she recovered all black mice. But then when she crosses the F1 mice to each other she recovered 28 black mice, 8 brown mice, and 13 white mice. Can you help her explain these results? (Type out the cross and include genotypes of as many mice as possible. What phrase best describes this phenomenon? How many genes are involved are they linked or unlinked? Etc.)
Answer:
Following are the response to the given question:
Explanation:
[tex]White = aaBB \\\\Brown = AAbb\\\\Parental \ \ cross: aaBB \times AAbb\\\\F1 \ progeny: AaBb\\\\F1 \ selfing: AaBb \times AaBb\\\\F2 \ progeny:\\\\[/tex]
[tex]\frac{9}{16} = A_{B_} = Black\\\\[/tex]
[tex]\frac{3}{16} = aaB_ \ = White\\\\[/tex]
[tex]\frac{3}{16} = A_{bb} = Brown\\\\\frac{1}{16} = aabb = White\\\\[/tex]
The observed progeny ratios closely match the morphological ratio of 9:3:4. That's a hereditary pharmacogenetic example.
Applying a number of distinct genes = 2
You have really no connection
Phenomenon=Recessive Epistasis
What type of frog or toad is this
Answer:
Explanation:
scaled reptiles
Answer:
this would be a black spot toad i think i am not 100 percent sure but its most probably this is a black spot toad
Explanation:
hope this help :]
The arctic fox has a diploid number of 50 an arctic fox was forming gametes by meiosis, how many chromosomes would be visible in prophase 17 Are the chromosomes replicated or non-replicated?
a. 2. 50; unreplicated
b. 28; replicated
c. 100, replicated
d. 25: unreplicated
e. 6.50; Replicated
Answer:
50 visible chromosomes and replicated.
Explanation:
Diploid number 50Haploid number 25When we talk about the cell cycle, we refer to the interphase and the cell division (mitosis or meiosis).
Interphase is composed of stages G1, S, and G2. During the S stage, the DNI replication process occurs. This is the only stage in which the DNI molecule replicates. The synthesis of histones and other associated proteins also occurs.
Meiosis occurs after the interphase is over.
Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.
At the beginning of prophase 1, DNI is condensed in a well-defined chromosome formed by two sister chromatids joined by a centromere. Each chromosome carefully pairs with its homologous chromosome. Homologous chromosomes aline together to make the crossing-over possible, the stage where they interchange their parts.
The whole set of chromosomes is present in prophase 1. The reduction occurs later.
So if the germ cell has 50 chromosomes, the same 50 will be visible during prophase 1. DNA has already been replicated during the S stage of interphase.
Which best describes the ecosystems on Earth?
A. Earth has mostly rain forest ecosystems.
B. Separate ecosystems can affect each other.
C. There are very few types of ecosystems on Earth.
D. Ecosystems do not interact with each other.
Answer:
Explanation:
B. có nhiều hệ sinh thái khác nhau trên trái đất. mỗi hệ sinh thái có một đặc tính riêng và chúng có thể kết nối, tác động qua lại với các hệ sinh thái khác
What are the three different ways a baby animal develops and what is it called?
2. What is the longest wavelength?
Answer:
red
Explanation:
Visible light may be a tiny part of the electromagnetic spectrum, but there are still many variations of wavelengths. We see these variations as colors. On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength.
Answer:
red has the longest wavelength.
Explanation:
blue and violet are the shortest