Answer:
A. There are fewer cells around the compound X disk compared to a control plate without compound X.
B. There are more cells around the compound X disk compared to a control plate without compound X
Explanation:
A mutagen is any chemical and/or physical factor that is able to induce mutations in the DNA sequence of the cells of an organism. In general, mutations have a deleterious effect on the phenotype. In consequence, it is expected that a mutagen would lead to a decrease in viability of the cells (for example, by causing a loss of function mutation in a growth factor and/or receptor that drives cell proliferation). Moreover, mutations may also cause gain-of-function mutations in genes that encode proteins associated with uncontrolled cell proliferation and survival, thereby increasing the number of cells around the compound X disk.
If a father is AA and a mother is AB, what is the probability for a child with AB blood? (Co-Dominance)
A 0%
B 25%
C 50%
D 75%
E 100%
Answer:
50% because there are two quantities
Explanation:
This means 1 out of 2
the fraction 1/2 = 50%
A couple wants a second child that is biologically related to them. They have been trying for five years. The wife is 45 years old and healthy, with no history of sexually transmitted diseases. Three rounds of artificial insemination with her husband's sperm have failed. There is no evidence of any problem with her husband's sperm count or motility. What would be the most likely next step
Answer:
they have to do it in a religious way HOW?they have tried it in a medical way but no answer.acoding to the question that is my answer
There is no evidence of any problem with her husband's sperm count or motility. In vitro fertilization using a donor egg and her husband's sperm.
What is Invitro fertilization ?In vitro fertilization (IVF) is an assistive reproductive technology (ART) which involve in retrieving eggs from a woman’s ovaries and fertilizing them with sperm.
This fertilized egg or embryo which can then be frozen for storage or transferred to a woman’s uterus, Infertility issues for which IVF necessary include reduced fertility in women over the age of 40, blocked or damaged fallopian tubes, reduced ovarian function, endometriosis.
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All igneous rock forms from cooling lava/magma, despite this, not all igneous rocks look the same. For example, some igneous rocks, like granite, have large crystals. The best explanation for this is
Answer:
depends on the mineral, metal, and compression content
Explanation:
without these variables we wouldnt have the different compositions and varieties of stones.
Why are hurricanes considered more damaging than tornadoes when tornados have stronger winds?
a Hurricanes only strike coastlines while tornados strike coasts and inland.
ENBE
b.
Hurricanes also cause flooding and occur over a broader area.
Tornadoes move more slowly than hurricanes.
d
Tomadoes only occur inland, away from coastlines.
Answer:
B.
Explanation:
Why are hurricanes considered more damaging than tornadoes when tornados have stronger winds? ... Hurricanes also cause flooding and occur over a broader area.
PLEASEE HELP ASAP!! ITS EASY!!! WILL MAKE YOU THE BRAINLIST!!!
What mechanism is responsible for the obvious signs of an intoxicated person?
muscle cells have been blocked by dopamine
nerve cells are not functioning at all
cells are prevented from releasing hormones and enzymes
nerve cells are not effectively communicating with muscle cells
Answer:
nerve cells are not effectively communicating with muscle cells
Which climate does not have warm summers?
Please help ASAP
A continental
B tropical
C polar
D dry
Answer:
c
Explanation:
Answer:
Polar
-i think-
Explanation:
Which factor affects the climate of an area due to differences in specific heat?
Please help ASAP
A mountains
B large bodies of water
C latititude
D longitude
Answer:
c latititude
Explanation:
Latitude or distance from the equator – Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.
Suppose the stereocilia of one hair cell become permanently bent toward the kinocilium. What will most likely happen as a consequence
Answer:The options are not given, here are the options from another website.
a. A single pitch will be constantly perceived
B. A single pitch will no longer be perceivable
c. A or B depending on the hair cell's location
d. A or B depending on the bending's direction.
The correct option is d.
A or B depending on the bending's direction
Explanation:
This is because stereocilia are normal bent where there is a shearing force that occur when there is a up and down movements of the basilar membrane . When stereocilia bend towards the kinocilium, it make it depolarizes the cell and lead to the afferent activity to rise up and when the stereocilia bend away from the kinocilium , it hyperpolarizes the cell and lead to a reduction in afferent activity.
The consequences of this are that a single pitch will be noticed, or no pitch will be noticed. This will depend on the direction the stereocilia have bent.
We can come to this answer because:
Stereocilia are cellular accessories that help cells move around.They can curve up or down, generating different but very important effects.If the curvature is made towards the kinocilium, we can notice the formation of a pitch, as the cell becomes polarized.If the curvature is in the opposite direction to the kinocilium, the cell will be depolarized and it will not be possible to visualize the pitch.In this case, we can state that the consequences of the curvature of the stereocilia will depend on the side towards which this curvature is directed.
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Paving land within a watershed will likely-
ANYONE WHO ROCKS AT SCIENCE PLZ HELP!!! ASAP!!!
Which of the following is a part of the heliocentric model?
A. All objects in space move around Earth in perfect circles.
B. All objects in space move around the sun.
C. All objects in space move in parallel tracks.
D. All objects in space are perfect spheres.
Answer:
B
Explanation:
The answer is B because not all objects in space are in perfect circles noting is parallel is space all planets more in different times and not all objects are perfect spheres. But all objects revolve around the sun because the sun is the center of are universe.
Hoped this helped!
The simple sugar in DNA is
O glucose
Deoxyribose
o
ribose
0
starch
Answer:
deoxyribose
Explanation:
answer above
25. in which of the following is sound wave not possible to travel?
a. air
b. plant
C. water
d. outer space
The answer ahould bbe A: cuz the sound wave itself has no defend to water and travel!!
Explanation:
HOPE IT HELP!!
what is soil plant nutrition?
Answer:
Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.
Answer:
Soil is a major source of nutrients needed by plants for growth.
Explanation:
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Which of these conditions may prevent mold from growing?
A.
high humidity
B.
freezing temperatures
C.
warm temperatures
D.
low humidity
Which general problems did Christian biologists in the 1700s struggle to understand?
Answer:
1.) rationalism, extinction, and biodiversity2.) extinction, homologies and biogeographic adaptation3.) naturalism, homologies and inheritance4.) racism, rationalism, and geneticshope it helps ya mate 0∆0.Which process requires energy from food to help a cell maintain homeostasis?
A. a phosphate ion being released from ATP
B. a phosphate ion being added to ADP
C. the conversion of glucose to oxygen
D. the creation of RNA from DNA
Answer:
B
Explanation:
If a skin cell of a dragon has 24 chromosomes, how many chromosomes are in a gamete of the dragon?
Answer:
meiosis
By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. The overall process of meiosis produces four daughter cells from one single parent cel
Explanation:
took test on edge
state the role of light photosynthesis
Answer:
the role of light photosynthesis is to absorb the sunlight so the the photosynthesis can happen if there is no light, or sunlight them photosynthesis cannot happen, light I intensity is a very important role to photosynthesis
Explanation:
hope that helped
What happens if mutations are not corrected
Answer:
A mutation cannot be corrected and can either harm, benefit or be neutral in an organism
Explanation:
A common gene mutation could be Cancer, this is a highly severe gene mutation that can cause a multitude of complications to an organism when left untreated. Some mutations such as Heterochromia, an eye mutation causing two different colored eyes, cause no harm, but makes the organism look more unique.
Hope this helps!
I cannot understand why answer is D ... can someone pls help me.
Answer:
It is quite simple.
Lets start from the markings above the topic "external temperature."
3 lines after 20 C is 23 C. As you can see, both of them (animal 1 and animal 2 wave drawing on the graph) meet at that point. So thats why Option D is correct
What causes blood pressure? Choose all that apply
Answer:
What causes low blood pressure?
Common causes of low blood pressure include a reduced volume of blood, heart disease, and medications. The cause of low blood pressure can be determined with blood tests, radiologic studies, and cardiac testing to look for heart failure and arrhythmias
Explanation:
Common factors that can lead to high blood pressure include: A diet high in salt, fat , and/or cholesterol . Chronic conditions such as kidney and hormone problems, diabetes, and high cholesterol. Family history, especially if your parents or other close relatives have high blood pressure.
The digestive system contains a variety of parts that perform specific functions within the body. The small and large
intestines have some similarities and some differences. Which function is only performed in the small intestine?
O water absorption
O vitamin absorption
O mineral absorption
O production of chyme
Answer:
d
Explanation:
Answer: d
Explanation:
In order to identify genes that function together in genetic pathways researchers can perform modifier screens, looking for second site enhancers or suppressors of a mutant. Which of the following is the most reasonable strategy for carrying out a suppressor screen in particular?
a. analyze the DNA sequence near the mutation of interest, looking for sequences that may act as silencers.
b. identify mutations that, when crossed with the original mutant, result in synthetic lethality.
c. mutagenize the original mutant and look for new mutations that reduce the severity of the original mutant phenotype.
d. screen for enhancer-trap strains that show gene expression differences in the original mutant.
e. isolate mutants with phenotypes similar to the original mutant phenotype and then cross the mutants to identify the affected genes.
Answer:
c. mutagenize the original mutant and look for new mutations that reduce the severity of the original mutant phenotype.
Explanation:
A suppressor screen is a technique employed to identify a second mutation (i.e., a suppressor mutation) capable of reverting/alleviating the phenotypic effects associated with an initial mutation. There are two types of mutants obtained from this approach: 1-Intragenic suppressors, which involve second mutations inside the gene that restore the original function of the mutated gene; and 2- Intergenic suppressors, also known as extragenic suppressors, which involve second mutations in a gene that is distinct from the original mutated gene (usually extragenic suppressors function in the same signaling pathway as the original mutated gene).
Sounds lower than what the human ear can sense are ultrasound True or false?
Answer:
True
Explanation:
we cannot hear ultrasound waves
describe an organism that uses both asexual and sexual reproduction.
Answer:
Also, many living things have evolved to use both asexual and sexual means of reproduction. For example aphids, slime molds, sea anemones, and some starfish are capable of both asexual and sexual reproduction
Explanation:
What makes a membrane semipermeable?
Explanation:
Membranes
Recall that phospholipids have a hydrophobic end and a hydrophilic end and that when placed in water they will orient themselves accordingly (5.11 pg 79). This is the basis for the plasma membrane of a cell. The cell membrane consists of a phospholipid bilayer with embedded proteins. We refer to the modern conceptual model of the cell membrane as the "fluid mosaic" model since the phospholipids are able to move about across the surface of the membrane (fluid) and the proteins are many and varied (mosaic) (5.12).
Attached to the some proteins and to some of the phospholipids are oligosaccharides (short polysaccharides). When a protein has an oligosaccharide attached it is called a glycoprotein. Glycolipids are phospholipids with the sugar chains added. These oligosaccharides are found on the outside of the membrane and are used in cell to cell recognition. They differ among species, among individuals and within individuals.
Membrane proteins can have a number of functions, such as transport proteins, enzymes (more on these shortly), receptor sites, cell adhesion, attachment to the cytoskeleton. (5.13)
The most important thing about membranes is that they regulate what moves in and out of a cell. The membrane is selectively permeable because substances do not cross it indiscriminately.
Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids. Ions such as H+ or Na+ cannot.
Transport proteins make passage possible for molecules and ions that would not be able to pass through a plain phospholipid bilayer. Some transport proteins have a hydrophilic tunnel through them which allows polar molecule or ions to pass. Others actually bind to the molecules and move them across the membrane. In either case transport proteins are very specific.
Passive Transport
how long will it take to reestablish the pine trees?
Your answer:
Answer: According to a study focusing on the Brazilian Atlantic forest, certain aspects can return surprisingly quickly – within 65 years. But for the landscape to truly regain its native identity takes a lot longer – up to 4000 years.
Explanation:
What is an energy pyramid????
Answer:
From each trophic stage in an ecosystem, a pyramid of energy reflects how much energy, originally from the sun, is retained or deposited in the form of new biomass. Around 10% of the energy is typically passed from one trophic level to the next, preventing a large number of trophic levels from forming.
Explanation:
example:
What is this diagram representing?
[A] Plant reproduction
[B] Photosynthesis
[C] Cellular respiration
Answer:
This diagram is representing photosynthesis.
Explanation:
am i right.