Answer:a
Explanation:
Answer:
a
Explanation:
PLEASE HELP !!!!!!!! -Under what conditions will water enter a cell?
Assume new techniques are developed with permit removing from a cell any desired parts or materials without killing the cell. If the centrioles were removed from a cell, the cell would then not have:_______
a. Chromosomes
b. Mitochondria
c. Spindle fibers
d. Ribosomes
Answer:
c. Spindle fibers
Explanation:
In eukaryotic cells, the centrioles are small sets of microtubules composed of tubulin proteins. Moreover, in animal cells, a centrosome is an organelle localized near the nucleus which contains a pair of centrioles. These organelles (centrosomes) are referred to as microtubule-organizing centers. During Anaphase, centrioles move to opposite sides in the cell in order to organize the spindle fibers and separate the chromosomes during cell division.
What do we use natural gas for? (What products and services does it facilitate?)
Natural gas is a non-renewable hydrocarbon used as a source of energy for heating, cooking, and electricity generation. It is also used as a fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals.
hope this help! ^^
in all what caused the earths temperature to rise by 10 degrees??
Answer: Global Warming
Explanation: Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. ... Temperatures are certain to go up further. Despite ups and downs from year to year, global average surface temperature is rising.
7 point
Which of the following equations has a slope of -3 and a y-intercept of 8?
Оy=3x+8
Оy=3x8
y=8X3
O y=3x*8
Gnnbbc
Answer:
y = 3x + 8 because the y-intercept is always adding if it's positive and and the slope always has the x in the back.
A DNA sequence that is responsible for the initiation of transcription in a cell-type specific manner is:_____.
Answer:
Promoter.
Explanation:
It is promoter because Promoter is a DNA sequence where's the gene transcription begins. It is the
DNA sequence which RNA polymerase binds or join to
so as to begin transcriptionn of a gene . It is a region where the regulatory elements i.e protein will bind to and the Promoter sequences are found directly upstream or at the end of 5' of the transcription initiation site. This can also encode RNA such as mRNA, trans and so on.
Which of the following is the most like the Biblical concept of grace:
O A. a wage: something earned
B. a benefit, blessing, standing, or position given without being earned or deserved
OC a reward; something achieved
O D. a woman's name
Answer: B
Explanation:
Grace is the term Christians use to describe God's unconditional love for everyone, whether or not they have behaved as he wants them to. Because God's love is thought to bring redemption , some Christians believe that salvation does not need to be earned through good works.
why would a policy of allowing only one child per family lead to reduction in the population
Explain the relationship among homeostasis, defective mitochondria, and the symptoms caused by LHON.
Answer: The Leber's hereditary optic neuropathy (LHON) is caused by defective genes contained in mitochondrial DNA.
Explanation:
LHON is causes the vision loss. This occurs due to mutation in the mitochondrial DNA. The symptoms are not associated vision loss thus it is difficult to predict that which member of family was the carrier of the disease. Some people do not get completely blind. A young male is expected to develop a risk of 50% development of this disease.
Why is diffusion important in the ocean
Regional erosion occurs at a rate of 2 m per 1,000 years.
How much regional erosion will occur over 100,000 years?
A) 20 m
B) 200 m
C) 2,000 m
D) 100,000 m
Answer:
c
Explanation:
Answer:
c
Explanation:
The retinohypothalamic path consists of a special population of retinal ganglion cells that have their own photopigment, called:
Answer:
melanopsin
Explanation:
this note might help you :
The retinohypothalamic tract (RHT) is a photic neural input pathway involved in the circadian rhythms of mammals. The origin of the retinohypothalamic tract is the intrinsically photosensitive retinal ganglion cells (ipRGC), which contain the photopigment melanopsin. The axons of the ipRGCs belonging to the retinohypothalamic tract project directly, monosynaptically, to the suprachiasmatic nuclei (SCN) via the optic nerve and the optic chiasm. The suprachiasmatic nuclei receive and interpret information on environmental light, dark and day length, important in the entrainment of the "body clock". They can coordinate peripheral "clocks" and direct the pineal gland to secrete the hormone melatonin.
information about melanopsin : Melanopsin is a type of photopigment belonging to a larger family of light-sensitive retinal proteins called opsins and encoded by the gene Opn4.[5] In the mammalian retina, there are two additional categories of opsins, both involved in the formation of visual images: rhodopsin and photopsin (types I, II, and III) in the rod and cone photoreceptor cells, respectively.
List what body systems perform the following life processes- growth, respiration, nutrition. What organelle performs nutrition, reproduction, and growth? How does the excretory system work together with the respiratory system?
Answer:
for respiration lungs,nose
for nutrition mouth and stomach
for reproduction various reproduction organs like penis and vagina
growth -
excretory - skin(sweat) ueltra blader kidney liver
Explanation:
What geologic forces drive tectonic movements?
Group of answer choices
seismic movement, volcanic activity, plate tension
Earth's rotation, geothermal activity, gravitational forces
plate subduction, convergence and divergence
Earth's orbit, solar winds, electromagnetic waves
Answer:
Earth's rotation, geothermal activity, gravitational forces
Explanation:
Tectonic movements refers to movement occurring within the earth's crust.
The rotation of the earth on it's axis releases significant amounts of gravitational energy that results in deformation and movement of the earth's crust and mass redistribution of the tectonic plates.
Some of the main forces by which earth's rotation affects tectonic movements are:
Tidal friction due to the gravitational force of the Moon as well the Sun on the earth's crust; and change of the shape of the earth due to small displacements of the rotational pole with respect to the earth's crust.
Geothermal activity is caused by the transfer of heat from depth to the earth's surface. Convection currents in the mantle drive tectonic movements. Within the mantle of the earth, molten magma rises to the top while hot cold solid rock sinks to the bottom setting up a flow known as mantle convection. The rising and sinking motions of materials deform the outer surface of the earth producing earthquakes, mountain ranges, and volcanos on earth.
Two gravitational forces- slab pull and ridge push- cause tectonic movements. Slab pull occurs where gravity pulls
the edge of a cold, dense plate into the asthenosphere due to its weight dragging the entire rigid plate along.
Ridge push occurs when material from a mid-ocean ridge when cooled and thus becoming denser, slides down a raised but weaker asthenosphere due to gravity and push outwards on the lithosphere farther away from the ridges, allowing hot magma from the mantle to flow upwards again.
Answer:
Earth's rotation, geothermal activity, gravitational forces
Explanation:
i got it right on the test so hope this helps :)
A researcher wishes to increase the half-life of a particular mRNA that she is transfecting into a eukaryotic cell line. How should this researcher accomplish this goal?
a. Inhibit RNA polymerase I.
b. Increase the length of the poly(A) tail of the mRNA prior to transfection.
c. Inhibit the spliceosomes in the cell.
d. Increase the length of the 5'; cap of the mRNA prior to transfection.
Answer:
b. Increase the length of the poly(A) tail of the mRNA prior to transfection.
Explanation:
Polyadenylation is the addition of a long chain of adenine (A) nucleotides at the 3' end during RNA processing. This resultant chain is known as poly(A) tail. A poly-A tail generally has a size of 100-250 residues long. The poly(A) tail increases the stability of the messenger mRNA prior to the translation by slowing down its degradation rate over time. The process of polyadenylation enables RNA transcripts to be exported from the nucleus in order to be translated by ribosomes in the cytoplasm.
A granite contains zircon crystals with 275 billion 235U atoms and 1925 billion 207Pb atoms. The half-life for 235U-to-207Pb decay is 704 million years. How old is the granite?
Answer:
The correct answer would be = t = 2.112 billion years
Explanation:
Given:
The number of crystal of uranium = 275 billion
The number of crystal of lead = 1925 billion
The half-life for 235U = 704 million years
Formula using :
N = N0e−λt
where,
no. of daughter atoms = N
at time t= 0, No. of parent atoms = N0.
Time = T
Half life = 0.693/λ
Decay constant = λ
Solution:
by putting value in the formula of the half-life
λ = 0.693/0.704
λ = 0.9844
Now, putting value in the formula for the age of granite.
275 = (275+1925)e^-0.9844 t
1/8= e^-0.9844 t
e^0.9844 t = 8
taking log
0.9844t = 2.07944
t = 2.112 billion years
The granite that contains zircon crystals with 275 billion 235U atoms and 1925 billion 207Pb atoms is 2112 million years old.
From the given information:
the total number of parent atoms is equal to the total number of ²³⁵U atoms
= 275 billion + 1925 billion= 2200 billionNow, from these 2200 billion atoms, 1925 billion of ²³⁵U atoms has changed to Pb²⁰⁷ atoms.
So when the number of half-life is: the parent atom is:
0 2200 billion
1 1100 billion
2 550 billion
3 275 billion
It implies that the parent atoms have passed through three half-life;
Thus, the age of the granite(parent atom) is calculated as:
age of granite = n × [tex]\mathbf{T_{1/2}}[/tex]
age of granite = 3 × 704 million years
age of granite = 2112 million years
Therefore, the age of granite is 2112 million years.
Learn more about half-life here:
https://brainly.com/question/16387602?referrer=searchResults
A small percentage of the body’s iron supply circulates freely in the blood, bound to a protein called transferrin. Transferrin binds to specific proteins on the surfaces of a cell's plasma membrane. The cell then ingests the transferrin by forming a pit, which becomes a vesicle. Which of the following BEST describes how transferrin is transported across the plasma membrane? A. exocytosis B. pinocytosis C. phagocytosis D. receptor-mediated endocytosis
Answer:
What best describes how transferrin is transported through the erythrocyte plasma membrane is receptor-mediated endocytosis.
Explanation:
The incorporation of transferrin across the erythrocyte membrane depends on a transferrin receptor expressed on the surface of the membrane. The specific receptor recognizes the presence of iron-charged transferrin, transferin diferrica, incorporating it into the cell by endocytosis. Once in the cytoplasm, the iron is dissociated from the transferrin.
Free transferrin is called apotransferrin. The transferrin receptor has a high affinity for transferrin di-ferrica, which facilitates its incorporation by endocytosis, and the release of apotransferrin into the extracellular space.
The other options are not correct because:
A. Exocytosis implies the exit of substances from the cell.
B. Pinocytosis involves the invagination of the membrane to incorporate soluble substances into the cell.
C. Phagocytosis is the incorporation of solid substances by invagination of the membrane.
Which is the biggest disadvantage of using unipotent stem cells for medical treatment
Answer:
they can make only their own type of cell
Explanation:
A P E X
Answer:
they can make only their own type of cell
Explanation:
Ape-x
If genes are on different chromosomes, the Law of Independent Assortment states that -
A) gene pairs always stay together
B) half an organism's gametes have allele per pair
C) gene pairs segregate randomly and independently for each other
D) one allele is always dominant
Ferns often have small bumps called sori arranged in rows on their undersides. What are these structures?A) Spore capsules.
B) Seed capsules.C) Nodules containing symbiotic bacteria.D) Parasites.
Answer:
A) Spore capsules
Explanation:
Ferns produce spore capsules contained in the sporangium (plural: sporangia), a structure localized on the undersides of the leaves. Moreover, the sporangia are borne in clusters known as sori (singular sorus). The spores are single reproductive cells that, when mature, are released from the sporangium to germinate on soil and produce new ferns. In a fern sporangium, the maximum number of spores is 64, although this number depends on the species.
Activity 1C, page 2 soil cross
Which of the following is a type of natural disaster that has impacted Florida? (3 points)
In lab this week we looked at different animal cells. Each of those cells has unique characteristics. Below I have a list of cellular characteristics. List which cell has the listed characteristic. Your options are: cartilage cells, neurons, red blood cells, skeletal muscle cells, or white blood cells.
Extensions
Matrix
No nucleus
Striated
Used in the immune system
Answer:
Red blood cells have no nucleus
White blood cells are used in the immune system
Skeletal muscle cells are striated
Cartilage cells make up the cartilage matrix
and Neurons have extensions
Hope this helps
HEEEEELP NOOOOWWWW its really easy if you understand this type of class
In the root structure there is an area where root cells get older, what is the name of that area?
a
area of getting older
b
area of cell elongation
c
area of maturation
d
apical meristem
Answer:
C. area of maturation
Explanation:
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Which of the following best describes how does latitude affect biomes?
Latitudes affect how much rainfall a biome will receive.
Lower latitude biomes will always have high temperature.
Higher latitudes produce warm biomes.
Higher latitudes receive less sunlight producing cold biomes.
Answer:
Higher latitudes receive less sunlight producing cold biomes.
Explanation:
Regions with similar climates and plant types are called biomes.
Terrestrial regions may be classified as desert biomes, rainforest biomes, grassland biomes, temperature deciduous forest biomes, tundra biomes, northern coniferous forest biomes, savanna biomes, and mediterranean biomes.
Because these biomes are mostly defined in terms of dominant vegetation or plant species, they are determined by rainfall and temperature. In general, higher latitude biomes are further away from the equator, less sunlight and heat- this results in drier climates with less rainfall and lower, cooler, temperatures.
Which is NOT an accurate statement about the structure of RNA?*
a polymer made up of nucleotides
b a type of nucleic acid
c four possible nucleotides due to four different nitrogenous bases
d single stranded
e these are all accurate
Answer:
b
Explanation:
bcuz whatever subject this is
compare and contrast the process of replication between the alien sample and eukaryotic life found on earth
Answer:
The answer is "Mode of replication".
Explanation:
The answer is the model for reproduction because it is the genetic reproduction implements a diffraction model, which replaces some old bases with other small colonies for each strand of the fetus, opposed to a semiconservative model of reproduction in eukaryotic cells, wherein one chromosome is completely new and one is old.
In general, the land changes temperature much more rapidly than the
ocean. How does this fact explain the existence of land breezes and sea breezes?
Answer:
Answer
Explanation:
Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean.
Which of the following is true of integral membrane proteins?
A. They lack tertiary structure
B. They serve only a structural role in membranes
C. They are loosely bound to the surface bilayer
D. They are usually transmembrane proteins
E. They are not mobile within the bilayer
Answer:
D. They are usually transmembrane proteins
Explanation:
Membranes are made up of a phospholipid bilayer, cholesterol and various mimbrane proteins. The lipids consist of outward facing hydrophilic heads and inwards facing hydrophobic tails. Cholesterol molecules help maintain membrane fluidity.
Transmembrane proteins play an important role. These help to transport various molecules and ions like glucose, and Na+ across the selectively permeable bilayer. These are permanently embedded within the membrane as integral membrane proteins, and do not move around.
Which phase in the cell cycle consists of the cell readying itself for its division?
A. Prophase
B. Interphase
C. Anaphase
D. Metaphase
Answer:
interphase
Explanation:
this is the resting stage where the cell grows and gets ready for division
Answer:
interphase
Explanation: