Answer:
The placenta allows the exchange of materials, including wastes, between the mother's blood and her developing fetus. - The placenta protects the fetus from some infections.
Explanation:
Hope this helps
Which option is an example of a longitudinal wave?
A. A sound wave
O B. A wave carried through a rope
O c. A light wave
OD. A wave on top of water
A wave carried through a rope is an example of longitudinal wave.
What do you mean by longitudinal waves?Longitudinal waves are waves in which the vibration of the medium is parallel to the direction the wave travels and displacement of the medium is in the same direction of the wave propagation.
The wavelength of a longitudinal wave is defined as the distance between two successive compressions or rarefactions. As given, the distance between the 5th and 6th rarefaction is 25 cm, therefore the wavelength of the wave will be 25 cm.
A sound wave is an example of a longitudinal wave and is produced by the vibrating motion of the particles that travel through a conductive medium. An example of sound waves in a longitudinal direction is the tuning fork.
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Summarize cell division in prokaryotes
According to the research, the correct answer is that unicellular living beings like prokaryotes have their cell division by binary fission, forming two identical individuals (daughter cells).
What is binary fission?It refers to the process of cell division where first the deoxyribonucleic acid (DNA) is duplicated and then cytonesis occurs, which involves the separation of the cytoplasm.
In this sense, it gives rise to two daughter cells with identical genetic material, this is the reproduction method shared by certain yeasts, algae, bacteria and other prokaryotic organisms.
Therefore, we can conclude that the cell division mechanism of prokaryotes is through binary fission where two daughter cells arise.
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Which statement is part of the cell theory?
A Single-celled organisms are made of one cell.
B Cells are different in size and shape.
C All cells come from other living cells.
D Cells sometimes only have one job.
Answer:
I believe it's C, all cells come from other living cells.
Why do you think that some bacteria/diseases are harder to eradicate than others?
What kind of inheritance is horse color an example of?
A. Complete dominance
B. Incomplete dominance
C. Co-dominance
✨Please help ✨due soon✨
Answer:
25%
Explanation:
i believe 25% because ita very rare
Doppler radar instruments transmit information in the form of
Answer:
By their design, Doppler radar systems can provide information regarding the movement of targets as well as their position. When the WSR-88D transmits pulses of radio waves, the system keeps track of the phase (shape, position, and form) of those pulses.
Explanation:
What do call the study of animals
Answer:
Zoology
Explanation:
It is the study of animals, a complex discipline that draws upon a diverse body of scientific observation and theory. It can be broken down into numerous sub-disciplines: ornithology (the study of birds), primatology (the study of primates), ichthyology (the study of fish), and entomology (the study of insects), to name a few. As a whole, zoology encompasses a fascinating and important body of knowledge that enables us to better understand animals, wildlife, our environment, and ourselves
Answer:
zoology!
Explanation:
Zoology (/zoʊˈɒlədʒi/) is the branch of biology that studies the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.
brainliest?
There is a lot of talk about gaps in the fossil record. This means that we do not necessarily have fossils for every organism that has ever lived. What do you think could account for these gaps in the fossil record?
Answer:
Explanation:
The rate decomposition of dead remains, to a large extent, determines whether there would be fossils left of the organism after it has been long gone or become extinct. Environmental factors (such as harsh weather condition and early insect invasion of dead remains) could increase the rate of decomposition of dead remains which could really make it difficult for fossils to be available for such organisms under these factors (especially if the organism is restricted to a particular region by nature) .
How can you die from drinking water
Answer:
hyponatremia
Explanation:
Answer:
choke, poison
Explanation:
A _______________ from the sun hits chlorophyll and excites an electron, known as __________________________________.
Answer:
Photon, light dependent reaction of photosynthesis
Explanation:
Photosynthesis is the process by which green plants make their own food in the presence of sunlight and water.
There are two steps of Photosynthesis that include light dependent reaction and light-independent reaction.
In light dependent reaction, a photon from the sun is absorbed by the green pigment in leaves called chlorophyll that allow the electron to excite from ground energy level to high energy level. It converts the solar energy into chemical energy and called light dependent reaction of photosynthesis.
Hence, the correct answer is "Photon, light dependent reaction of photosynthesis".
Fill in the blank: ______ is the process that splits rock when water seeps into cracks, then freezes and expands.
YES I WILL HAVE A LOT OF FILL IN THE BLANK GET READY
Answer:
Freeze-thaw
Explanation:
Answer:
frost wedging
Explanation:
1. What is the pH range for an acid?
A. 0 - 7- 14
2. What is the pH range for a base
A. 0 - 7- 14
3. What are the products of an acid base reaction?
A. water and salt
B. acid and base
C. water and sugar
D. water
4. What substance has a neutral pH?
A. ammonia
B. water
C. sodium bicarbonate
D. vinegar
5. The negative ion found in bases is the ______________
A. hydrogen ion (H+)
B. hydroxide ion (OH-)
Answer:
0-7-14
0-7-12
c is correct water and suger
d is correct vinegar
b is correct (OH-)
Which object is created during the formation of a star
Answer:
Protostar
Explanation:
Answer:
The answer is a protostar
Explanation:
Which of these is the form in which
igneous rock begins?
A. sediment
B. magma
C. carbon
D. soil
Answer:
B)Magma
Explanation:
students observed several prepared slides of a process that occurs in a dividing onion cell. they observed haploid cells in one slide, centromeres that did not separate during anaphase in another slide, and two different cell divisions resulting in 4 daughter cells in other slides. Which statement is not true about the process that was observed?
1.) the slides were of an egg cell or sperm cell
2.) the process observed produce genetically different cells
3.) the number of chromosomes resulting from the process is reduced by half
4.) the observations suggest cellular reproduction and general growth and repair of the body.
Answer: pretty sure it could be “B”.
Explanation:
Meiosis produces 4 haploid cells -gametes- from a single diploid cell. The statement that is not true is 4). the observations suggest cellular reproduction and general growth and repair of the body.
Observed prepared slides:
haploid cells in one slide.centromeres that did not separate during anaphase in another slide.cell divisions resulting in 4 daughter cells in other slides.
According to this information, we can assume that the students are observing the occurrence of meiosis events.
MeiosisThrough Meiosis, a diploid cell (2n) produces four haploid daughter cells (n). Thes haploid cells are the gametes.
After DNA replication there are two meiotic phases.
The first one is a reductive phase, in which homologous chromosomes separate. In the second phase, the cell suffers a new, not reductive division.1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and become visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: Homologous chromosomes randomly align in the equatorial plane. Anaphase I: In this phase occurs the division and independent separation of homologous pairs. Each chromosome migrates to different poles. This separation generates different chromosomal combinations in the daughter cells. Telophase I: Chromosomes of homologous pairs are already in the corresponding poles, and the nuclear membrane forms again in each pole. Cytokinesis occurs.2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes become lax again, and the nuclear membrane forms again. Cytokinesis occurs. Options1.) the slides were of an egg cell or sperm cell ⇒ Correct. It makes reference to gametes -haploid cells-.
2.) the process observed produce genetically different cells ⇒ Correct. After crossing over and independent segregation of chromosomes.
3.) the number of chromosomes resulting from the process is reduced by half ⇒ Correct. After the reductive phase.
4.) the observations suggest cellular reproduction and general growth and repair of the body. ⇒ INCORRECT. Mitosis is in charge of general growth and repair of the body, not meiosis.
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Which describes a difference between a positive and a negative feedback loop?
a.) The output of a system signals the system to disregard the stimulus only in a negative feedback loop.
b.) The output of a system stimulates another cycle of the system only in a positive feedback loop.
c.) The output of a system maintains conditions around a set point only in a positive feedback loop.
d.) The output of a system keeps conditions within the body absolutely constant only in a negative feedback loop.
Which of these are an important part of a scientific process?
Answer:
Is it multiple choice?? If it is, then show us the options
Explanation:
PLEASE HELP AT THIS POINT IM BEGGING YOU
9. Mendel’s research led to several conclusions about how traits are passed through generations. Choose TWO of the conclusions from the bullet list below and provide evidence from THIS activity that supports this conclusion. (6 points)
Different forms of a gene account for variations in the inherited traits
An organism inherits two genes for each trait, one from each parent.
Some alleles are dominant over others for a given trait.
The two genes of a given trait segregate during gamete production.
#1)
Which conclusion from the list above did you pick? _________________________________________________
How does it apply to the monsters activity?
#2)
Which conclusion from the list above did you pick? _________________________________________________
How does it apply to the monsters activity?
Answer: Mendel's research lead to several conclusions about the traits and its passing through generations. The two of the conclusion are different forms of a gene account for variation in the inherited traits and some alleles are dominant over others for a given trait.
Explanation
George Mendel was a famous biologist. His research was on genes and traits. His experiment shows how genes gets transferred from parents to offspring. Also he stated about the behavior and dominance and recessive nature of that alleles.
He also gives the possibility of dominance of a trait over other trait. The different forms of gene are responsible for various types of inherited traits in an organism.
hope it helps
GIVE ME CHEEESE!!!!!!!!!!!!!!!!!!
Anthophytes that live for only one year or less are called _____.
a.
annuals
c.
perennials
b.
biennials
d.
dicots
Answer:
annuals
Explanation: bc
FILL OUT THE BLANKS PLS!!
If leaf color change is related to temperature, then exposing plants to low temperatures will result in changes in leaf color:
Independent: _________
Dependent: __________
Other variable(s): ________
Answer:
If leaf color change is related to temperature, then exposing plants to low temperatures will result in changes in leaf color:
Independent: temperature.
Dependent: leaf color.
Other variable(s): According to the information, there are no other variables.
Explanation:
When formulating a hypothesis, it is inevitable that the presence of variables on which the hypothesis is formed is established. The hypothesis raised is the effect of temperature on the color change of the leaf of a plant.
The independent variable, used in research work, is an element that does not depend on other variables but can influence the behavior of the dependent variable. In this case, the independent variable is the temperature. In addition, the independent variable can be managed to observe its effect on other variables.
An dependent variable is a characteristic that is influenced or modified by the presence of other variables, such as the independent variable of a study. In this case is the color of the leaf of a plant.
4. What is the probability that an offspring will have a yellow seed? (1 poin
25%
37.5%
075
Which activity occurs in the process of photosynthesis?
A) Chemical energy from organic molecules is
converted into light energy.
B) Organic molecules are obtained from the
environment.
C) Organic molecules are converted into light energy.
D) Light energy is converted into the chemical energy.
Answer:
A) Chemical energy from organic molecules is
converted into light energy.
Explanation:
Plants can take energy from the sun and use that energy to synthesize carbohydrates. The process by which plants convert solar energy into chemical energy is called photosynthesis. During photosynthesis, carbon dioxide and water are converted into carbohydrates and molecular oxygen.
Answer: D
Explanation: because
A student states that petrification occurs when pore spaces in an organism's remains are filled with minerals that precipitate out of solution. What is wrong with this statement?
A.
Permineralization occurs when pore spaces in an organism's remains are filled with minerals that precipitate out of solution.
B.
Petrification occurs when once-living tissues are replaced by minerals, preserving the organism's structure.
C.
Both A and B describe errors in the statement.
D.
Nothing, this statement is correct as is.
Answer:
C. Both A and B describe errors in the statement.
Explanation:
In fossilization i.e formation of fossils, two terms are used as follows: permineralization and petrification.
- Permineralization is a process whereby the pore spaces of an organism's remains are filled with mineral matter that precipitates from lake and ocean solutions.
- On the contrary, petrifaction or petrification is the process whereby a once-living tissue (matter) are REPLACED by minerals, hence, preserving the organism's structure by turning it into a stone (petros).
According to this question, the student mixed up their definitions by giving the definition of permineralization instead, however, options A and B have described the errors associated with the statement.
1+2+3+4-17(2) < 36 +23=?
Answer:
True
Explanation:
The question is incomplete. However, I'll treat it as a true/false question
Given
[tex]1+2+3+4-17(2) < 36 +23=?[/tex]
Required
True or false
[tex]1+2+3+4-17(2) < 36 +23[/tex]
Open bracket
[tex]1+2+3+4-17*2 < 36 +23[/tex]
[tex]1+2+3+4-34 < 36 +23[/tex]
Evaluate the expression on the left-hand side
[tex]-24 < 36 +23[/tex]
Evaluate the expression on the right-hand side
[tex]-24 < 59[/tex]
24 is truly less than 59.
Hence:
[tex]-24 < 59 = True[/tex]
all the black widow spiders on a 5 acre farm
A. biotic factor
B. population
C. species
D. community
Species because they group that shares the same traits
PLEASE HELP ME!
Polar climates normally get ____________ amounts of precipitation.
a.
high
c.
medium to high
b.
little
d.
little to medium
Please select the best answer from the choices provided
Answer:
little
Explanation:
because it is so cold there
Discuss the differences between embryotic and adult stem cells?
Answer:
The difference is that adult stem cells unipotency and embryonic stem cells have pluripotency
Explanation:
I hope I helped
Suppose an ice cube is dropped into a beaker of hot water. Eventually, the ice will melt and the hot water will cool. Which of the following statements best describes the water in the beaker?
A.
The water will reach thermal equilibrium.
B.
The water will not all be the same temperature.
C.
The warmer water will rise above the cooler water.
D.
The water will reach specific heat.
Can anyone help with these 3 questions thank you xx
Answer:
I know the answer to your 3.1 question. Between minutes 15 and 60, the blood glucose level goes up for about 20 minutes and then drops over the next about 30 minutes to it’s lowest point. iI do not know the answers to the other ones, but I really hope this helps! :)
Explanation: