Answer:
One sister chromatid is inherited from each parent.
Explanation:
Answer:
I'm sorry I don't have the answer, but I saw Michael Gary Scott and I freaked, I LOVE THE OFFICE!
why is a rocky substrate necessary for coral reef
Answer:
Somebody better call God, because he’s missing an angel.
(aka you)
Explanation:
in living organisms, the cell cycle is closely regulated. What do you think will happen
if cell division is not controlled?
Answer:
it could result in cancer; cancer is the uncontrolled division of cells
Explanation:
Why do you need only one polio vaccination, but a new flu shot every year?
Answer:
The flu virus mutates
Explanation:
We need a new vaccine for each new strand of a flu virus
these are pieces of stems placed under suitable condoms which will produce new plants
please help
Answer:
Suitable environment is the need of plants to grow.
Explanation:
Stems also grows into some plants because many plant grow without roots such as rose plant. if only the stem is sown in the soil and provides suitable environment so they will grow and produces leads as well as roots and grow as a full plant so that's why the pieces of stems placed under suitable conditions which will produce new plants.
Pls hurry worth 20 points and will mark brainliest!!!
Answer: A the act of changing the functions of proteins.
Explanation:
Answer:
First one (80% probability)
When women are in labor, the uterus contracts more and more strongly by the actions of a peptide hormone messenger. This scenario is an example of.. * 1 point a negative feedback loop. a positive feedback loop. signal transduction immediately changing gene expression in its target cells. the key role of the anterior pituitary gland in regulating uterine contraction.
Answer:
The correct answer is - a positive feedback loop
Explanation:
Oxytocin is a peptide hormone that is released during labor in women which contracts the uterus and n increase of the oxytocin causes more release of oxytocin hormone to increase the contraction more strongly.
Oxytocin shows a positive feedback loop as its release leads to more of the oxytocin release by stimulates its more release. Most of the hormones show negative feedback release.
Describe the
relationship
between the age
of rock layers and
an unconformity
Answer:
Laws of stratigraphy help scientists determine the relative ages of rocks. This law states that deeper rock layers are older than layers closer to the surface. An unconformity is a gap in rock layers. They occur where older rock layers eroded completely before new rock layers were deposited.
Explanation:
The study of rock strata is called stratigraphy. The laws of stratigraphy can help scientists understand Earth’s past. The laws of stratigraphy are usually credited to a geologist from Denmark named Nicolas Steno. He lived in the 1600s.
Hope this helps!
Brain-List?
1.)The more mass a star has the younger it is.
O True
O False
2.) _______ are groups of up to a few thousand stars that are loosely held together by gravity. _______ tend to be blue in color and often contain glowing gas and dust. They are made of young stars that formed from the same nebula.
A.) Dark matter
B.) Dark energy
C.) Open clusters
D.) Globular clusters
Base your answers to the next question on the diagram below and on your knowledge of biology. The diagram represents a laboratory setup. A starch solution in a test tube was separated from the water in a beaker by a dialysis membrane. One hour later, it was observed that the liquid had risen in the test tube. The rise of the liquid in the test tube that was observed after one hour can be explained as a result of the *
Answer:
water moving from the beaker into the test tube
Explanation:
this was just on a quiz i had and it showed me the right answers after i finished
Osmosis can be used to explain the increase in fluid in the test tube that was observed after one hour.
Osmosis is the movement of water molecules through a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. In this arrangement, the pure water in the beaker has a lower concentration of solute than the starch solution in the test tube.
Water molecules can pass through the dialysis membrane, but larger solute molecules such as starch cannot. Since the concentration of solute in the starch solution in the test tube is higher than in the water in the beaker, the water molecules move through the membrane to the beaker. This flow of water in the test tube increases the level of the liquid by increasing its volume. Therefore osmosis can be used to explain the rise of liquid in a test tube.
Learn more about osmosis, here:
https://brainly.com/question/31028904
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What are the FIVE ways an object's motion can change?
Answer: An object's motion can change physically by humans, Physically by humans The action from a force can cause an object to move or can speed up accelerate, to slow down (decelerate), to stop, or to change direction. Since any change in velocity is considered acceleration, it could be said that a force on an object results in the acceleration of a object.
Explanation: please can I get brainliest
Motion is defined as the phenomena where an object moves from one point to another. Usually, a force has to act on the object for it to be in a state of motion.
Mathematically, motion has to do with:
AccelerationDisplacementDistanceVelocitySpeedTime.With this in mind, the five ways an object's motion can change include:
When the speed acting on the object changesWhen the force acting on the object changesWhen the acceleration changesWhen the velocity acting on the object changesWhen there is a greater displacement acting on the object.Read more here:
https://brainly.com/question/18668011
Structures that function in chemoreception and are found at the anterior and posterior ends of nematodes are
Answer:
amphids and the phasmids
Explanation:
The high-altitude wind that blows from the west to the east over the United States is the _____
A. Trade wind
B. Westerly
C. Tropical wind
D. Jet stream
Answer:
b is the right answer
Explanation:
what is the big bang theory, explain it in theory
Explanation:
The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today
Hi!The Big Bang theory is the prevailing cosmological model explaining the existence of the observable universe from the earliest known periods through its subsequent large-scale evolution.
Ok boys, my bio unit test is going to start i want you guys help me pass. Plz answer the right answer, tysm
The Groundwater system?
Answer:
A groundwater system comprises the subsurface water, the geologic media containing the water, flow boundaries, and sources (such as recharge) and sinks (such as springs, interaquifer flow, or wells).
Explanation:
Bacteria that act as producers in an ecosystem by using energy from chemicals in the environment to make carbon compounds such as glucose are called:
a
chemoheterotrophs
b
photoheterotrophs
c
photoautotrophs
d
chemoautotrophs
Answer:
D) chemoautotrophs
Explanation:
Chemoautotrophs are cells that create their own energy and biological materials from inorganic chemicals.
In nature, “autotrophs” are organisms that don’t need to eat because they make their own biological materials and energy. This term comes from the Greek “auto” for “self” and “troph” for “to eat” or “to feed.”
Autotrophs form the basis for all food chains: they are the organisms which create sugars, proteins, lipids, and other materials for life. All other organisms survive by eating autotrophs, or other organisms that are fed by the autotroph food chain.
The two major types of autotrophs are chemoautotrophs and photoautotrophs. Photoautotrophs use energy from sunlight to make their biological materials. These include green plants and photosynthesizing algae.
This flow chart may be useful in determining whether an organism is an autotroph, and if so, which kind it is:
Troph flow chart
Chemoautotrophs, on the other hand, derive energy for their life functions from inorganic chemicals. They feed on chemicals that are good electron donors, such as hydrogen sulfide, sulfur, or iron.
Like all autotrophs, chemoautotrophs are able to “fix” carbon. They take atoms of carbon from inorganic compounds, such as carbon dioxide, and using it to make organic compounds such as sugars, proteins, and lipids.
Chemoautotrophs are commonly found in environments where plants cannot survive, such as at the bottom of the ocean, or in acidic hot springs.
Some types of chemoautotrophs also play critical roles in plant-based ecosystems. Although plants perform carbon fixation in these ecosystems, many plants rely on chemoautotroph bacteria to fix nitrogen, which is necessary to make amino acids and proteins.
Function of Chemoautotroph
Basis of Ecosystems Without Sunlight
Chemoautotrophs form the basis of the energy pyramid for ecosystems where photosynthesizers can’t survive. Without chemoautotrophs, life would only be able to exist where energy could be derived from sunlight.
They are the basis of some deep sea ecosystems, such as those existing around deep sea hydrothermal vents.
Scientists have speculated that chemoautotrophs could form the basis of life on planets which receive less sunlight than earth.
Nitrogen Fixation
One type of chemoautotroph, Nitrosomonas, plays the crucially important role of fixing nitrogen in the soil of some ecosystems. Like most chemoautotrophs, Nitrosomonas can take toxic chemicals – in this case ammonia – and turn it into materials for life.
Nitrosomonas harvests nitrogen from ammonia, and fixes it into organic compounds which can then be used to produce amino acids, proteins, and other crucial materials for life.
Possible Origin of Life
We have no fossils of the first cells on Earth, so we are not able to say at this time what they were like. We know that they had to be autotrophs, since they would have had to produce all of their own organic materials.
Some scientists think that the first cells were likely photoautotrophs, deriving energy form sunlight – but other scientists think the first cells may have been chemoautotrophs, and that photosynthesis may have evolved later.
If true, this would make all of us descendants of chemoautotrophs!
Examples of Chemoautotrophs
Nitrosomonas
Nitrosomonas is a genus of nitrogen-fixing bacteria.
As you may have guessed, “nitrogen fixation” means taking nitrogen from inorganic compounds, such as ammonia, and assembling it into organic compounds, such as amino acids.
Nitrogen fixation is crucial for many ecosystems, even some which rely primarily on plants. Many plants cannot fix their own nitrogen – meaning that they require nitrogen-fixing bacteria in the soil, or they cannot obtain the nitrogen compounds they need to live.
Nitrogen fixation is an extremely important concept in agriculture, where many crops cannot perform nitrogen fixation themselves. To ensure that the soil contains enough organic nitrogen compounds to grow, farmers much either make sure that there are enough nitrogen-fixing bacteria present to sustain their crops, or add artificial nitrogen compounds in the form of fertilizers.
Of note, some nitrogen-fixing bacteria have developed permanent symbiotic relationships with certain plant species. These include the symbiotic bacteria found in nodules on the roots of “nitrogen-fixing” plants such as legumes. However, these nitrogen-fixing bacteria are not chemoautotrophs, as they have evolved to rely upon their plant hosts for food. They are no longer autotrophs, as they are no longer able to feed themselves.
Other types of nitrogen-fixing bacteria remain independent, and are still chemoautotrophs.
Help!!!! Can anyone answer this lab questions below about mitosis!!!!
Answer:
Mitosis is a division of a eukaryotic cell in which the chromosomes are evenly distributed among the daughter cells.
In multicellular organisms, both sexual and asexual reproduction is followed by cell division, which ensures the growth and development of the organism. In addition, cell division is necessary to replace dead cells and repair injuries. New cells are constantly being added and old ones are being destroyed. About a hundred thousand more cells are created every second, and of course the same number dies. The new cells start with the division of the source cell. The cells formed in this way are called daughter cells. Stem cells can gradually divide into all the different cells in the body through mitosis.
Most of the body's cells are constantly renewed by mitosis, but there are also so-called irreplaceable cells that are formed only once in a lifetime for the life of the organism and do not regenerate by mitosis.
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Answer:
The correct answer is - option D.
Explanation:
Mendel also performed this type of dihybrid cross that the genes for pea shape color assort independently of each other.
In this punnet square: there is a genotype ratio close to 9:3:3:1 of 9 = round-seed plants with green pods, 3 = wrinkled-seed plants with green pods, 3 =round-seed plants with yellow pods, and 1 = wrinkled-seed plants with yellow pods.
This is an expected ratio with an independent assortment of dominant and recessive alleles.
The process of reproduction is not essential for the survival of an
individual but reproduction is essential for the continuation of a
species. (True or False)
Answer:
true
Explanation:
While it is one of the fundamental characteristics of living things, it is not an essential life process. An individual can live without reproducing, but, a species cannot survive without reproduction. Reproduction is thus essential for continuation of the species.
When during meiosis does crossing over happen?
Answer:
prophase
Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I. By meiosis II, only sister chromatids remain and homologous chromosomes have been moved to separate cells. Recall that the point of crossing over is to increase genetic diversity.
Explanation:
:)
What one of the following historical figures is best known for establishing the first modern taxonomic system?
O Charles Darwin
O Carl Linnaeus
O Theophrastus
O Gregor Mendel
Answer:
seond one Carl Linnaeus
Which excerpt from the passage "Equal Justice Under Law" most effectively illustrates Thurgood Marshall's natural tendency to resist authority?
"If he wasn’t throwing chalk or teasing girls, he was arguing with teachers."
"So, one day, the principal sent him to the basement with a copy of the United States Constitution and stern orders not to come back up till he had memorized a passage."
"'Before I left that school,” Marshall said many years later, 'I knew the whole thing by heart.'"
"Parts of the Constitution, however, confused the young Marshall."
Answer:A
Explanation:I took the test just now and that was the correct answer, goodluck :)
Answer:
The answer is a
hope this helps even though the other person already answered this and you asked it 10 hours ago :)
Please help! Thanks
Is sulfur a mineral and does it meet the criteria???
Answer:
Explanation:
Although not an important rock-forming mineral, sulfur is still a crucial resource for human societies. Sulfur is a native element as well as a mineral. Its crystal form consists of transparent to translucent crystals that have an unmistakable deep yellow color.
Answer:
Sulpher is an element ,whose atomic no. Is 16 and atomic mass is 32.it is a non-metal Wich is yellowish in colour.
Which is an example of genetic diversity?
1. bacteria, garter snakes, tigers
2. temperate rain forests and a tropical rain forest
3. Variations in a flock of starlings
4. bees, jack rabbits, diamondback rattlesnakes
Answer:
1.bacteria, garter snakes, tigers
How do you know that matter is conserved during the process of cellular respiration?
A) It has the same number of atoms in the inputs and outputs
B) It has the same number of molecules in the inputs and outputs
C) The same number of carbon molecules in the inputs is found in the outputs
Question 12 (3 points)
Use the diagram below to answer the following questions for 1 point each:
1. Identify ONE similarity between mitosis and meiosis.
2. Identify ONE difference in the results of mitosis and meiosis.
3. Identify ONE difference in the processes of mitosis and meiosis.
Answer:
Production of DNA.
Somatic cells and sec cells.
Diploid and haploid chromosome.
Explanation:
Similarity between mitosis and meiosis is the production of DNA and both passes through the same phases of cell division. Mitosis cell division occur in somatic or body cell whereas meiosis occur in sex cell of plants and animals. Daughter cells that is produced in mitosis are diploid i. e. double number of chromosome while on the other hand, daughter cells that is produced in meiosis are haploid i. e. half number of chromosome.
What does a generator do?
Answer:
it power's things when you don't have any power
1. What is the difference in the base pairing rules for DNA and RNA?
2. The what would be the complementary DNA strand for the following piece of DNA?
ATG GCT CTA CGT AAG
3. How would that change if the complementary strand was RNA?
Answer:
1.
DNA
A-T
G-C
RNA
A-U
T-A
G-C
2.
TAC CGA GAT GCA TTC
3.
AUG GCU CUA CGU AAG
What are the three final nucleotides on the newly created mRNA in the animation sequence?
Answer: They are the stop codon
Explanation: At the end of and mRNA squence there are three nucleotides that tell the ribosome to end the protein being made.