Answer: Adenine
Explanation:
The structure of the DNA double helix is complex in nature. There are two strands of DNA that are wound around each other. The nitrogenous bases are bonded with hydrogen bonding and base complementarity. According to the Chargaff's rule of base complementarity adenine always pairs with the thymine and guanine with cytosine. These nitrogenous bases are paired on the basis of hydrogen bonding. Adenine bonded with thymine through two hydrogen bonds whereas the cytosine pairs with guanine via three hydrogen bonds. During DNA denaturation these hydrogen bonds are broken whereas during DNA replication these hydrogen bonds are formed between the nitrogenous bases.
1) How is nondisjunction related to Down syndrome and other abnormal chromosome numbers?
2) State the differences between DNA and RNA
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why is it important that you have white blood cells that perform edocytosis
Why can particles diffuse? Make it like a one sentence pls
[tex] - [/tex]
That's cause they have large spaces between them .
Particles can diffuse because the particles are too small and they do not have any define path, so they move from high density region to low density.
What is a particle?
"A particle is a small piece of anything. Particle can also refer to a subatomic particle with mass and structure, but takes up hardly any space at all. Particles are tiny."
What do you mean by diffuse?
"Diffuse means spread out over a large area."
What is diffusion?
“Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.”
What causes particle to diffuse?
"Diffusion occurs due to the random movement of particles. It usually happens due to a concentration gradient, meaning that molecules move from an area of high concentration to an area of lower concentration."
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Duplicate chromosomes line up (in a single line) during metaphase
Answer:
Metaphase: During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate. Anaphase: During anaphase, the centromere splits, allowing the sister chromatids to separate. ... These separated sister chromatids are known from this point forward as daughter chromosomes.
Explanation:
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4. What might happen if an ant's antennae were
damaged?
a. It might have trouble walking
b. It might have trouble lifting heavier objects
c. It might have trouble killing its prey
d. It might have trouble communicating with other ants
Answer:
it might have trouble walking
*PLS HELP ME**
"Scientists are tapping algae to fuel a sustainable energy future."
Type a one page essay on your thoughts about algae as a biofuel. Is it economically viable? What are the pros and cons?
Answer:
How many word tho ?
Explanation:
A dichotomouys key is used to identify a plant. 1a. Leaves are spiny ......................Pinus taeda 1b. Leaves are broad..................... Go to 2 2a. Single leaf..........................Go to 3 2b. Many leaves....................... Go to 4 3a. Leaf edge is smooth..............Cornus florida 3b. Lead edge is rough...............Ulmus americana 4a. Leaflet edges are smooth........Albizia julibrissin 4b. Leaflet edges are rough.........Juglans nigra A plant has many broad leaves with rough edges. What type of plant is this? (1 point)
albizia julibrissin
pinus taeda
cornus florida
juglans nigra
Answer:
juglans nigra
Explanation:
I did my research and its correct I finished the quiz
1 B
2 C
3 D
4 C
5 A
The plant identified by the dichotomous key is juglans nigra.
What is a dichotomous key?A dichotomous key is a tool used to identify any plants and animals in the ecosystem.
They are identified by their morphological traits.
The key is made up of a set of paired assertions or clues about the qualities or attributes of the organisms.
It serves as a step-by-step guide to identifying each object.
Thus, the correct option is D, juglans nigra.
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Explain the difference between the effects of balanced and unbalanced forces on an object. To receive full credit you must mention net force and whether the motion will change or not.
PLEASE HURRY WILL GIVE BRAINLIEST!!!
Answer:
balanced forces dont result in a change of motion. Unbalanced forces always result in a change of motion
if the forces applied are different amounts of newton's it causes an unbalanced force changing motion or even direction
What is the outer layer of the brain often called?
neurons
axons
grey matter
white matter
Answer:
DURA MATTER
Explanation:
Answer:
grey matter
Explanation:
Why is biodiversity important?
Answer:
Biodiversity is important to humans for many reasons. Ecological life support biodiversity provides functioning ecosystems that supply oxygen, clean air and water, pollination of plants, pest control, wastewater treatment and many ecosystem services
1. Which of the following is NOT one of the Earth's systems?
A Hemisphere
B Biosphere
C Atmosphere
D. Hydrosphere
A. Hemisphere
..................
Answer:
B.Biosphere
Biosphere, relatively thin life-supporting stratum of Earth's surface, extending from a few kilometres into the atmosphere to the deep-sea vents of the ocean. The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients.
Explanation:
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Are haploid cells sexual or asexual reproduction?
Suppose the phloem of a seed plant is damaged and does not function properly.
How will this most directly affect the plant?
Answer:
Food will not be carried away from the leaves
Explanation:
HELPP PLZZZZZZ !!!!!!!!
What provides the energy for all living processes?
A. chemical bonds
B. ionic compounds
C. radioactive isotopes
Answer:
C
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter.
What are 3 ways in which matter changes over time?
Please help me i have a science paper that has this question
solid , maltings , freezing
True or False: Eye Color: Blue and Brown and Freckles: Freckles or no freckles are examples of human traits that have 2 variations of that trait. Typically there is not any human trait like these that are more beneficial than another.
Answer:
Explanation:
True
How are government agencies like the local health department working to keep the public safe from the problem of HAB's?
Answer:
The local health departments work together with local water suppliers and act to monitor harmful algal blooms (HABs)
Explanation:
Harmful algal blooms (HABs) are produced by blooms of algae (phytoplankton), some of them may produce toxins that lead to illness/death in humans and marine organisms (e.g., marine mammals, fish, seabirds, etc). HABs represent a real concern for coastal areas. Cyanobacteria, also known as blue-green algae, may produce HABs both in fresh water and in marine water. Some of the most common causes that may lead to a HAB include the runoff of nutrients (especially those rich in nitrogen and phosphorus), high temperatures, a slow movement of water bodies, etc. The local health departments work to monitor these phenomena by collecting samples in order to analyze the state of the water (i.e., by identifying the presence of toxins, especially cyanotoxins) and give advice to local residents. For these purposes, it is generally required to analyze phytoplankton composition, especially the presence of accessory pigments to chlorophyll a (since these pigments represent good indicators for possible HABs).
Nucleotide are composed of a photosphate group a sugar and nitrogenous base DNA Isela made up of long Strands of nucleotide which part of the above molécule can differ between nucleotides
Answer:
The phosphate end and OH end of nucleotide in DNA differ from free nucleotides molecules.
Explanation:
5' phosphate group of one nucleotide and 3'-OH group of another nucleotide combine to form phosphodiester bond which holds the nucleotides in DNA molecule.
The phosphate end and OH end of nucleotide in DNA differ from free nucleotides molecules.
Which element is so reactive it is found in nature only in compounds?
Group of answer choices
Na (sodium)
Au (gold)
O (oxygen)
Fe (iron)
If a gene has two alleles, there are two possible genotypes.
a. True
b. False
Answer:
b. False
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, handedness, freckles, curly hair, color blindness, height, etc.
According to Mendel's Law of Dominance, if a gene has two alleles, there are three (3) possible genotypes.
The three (3) possible genotypes are;
I. A combination of alleles such as AA.
II. A dominant combination (phenotype) such as Aa.
III. A recessive combination such as aa.
Where;
A represents the dominant allelea represents the recessive allele.Also, a single version of a gene expressed by a living organism is referred to as an allele.
What differentiates Hela cells from other human cells?
Answer:
a normal cell contains 46 chromosomes whereas HeLa cells contain 76 to 80 (ref) total chromosomes, some of which are heavily mutated (22-25), per cell.
Explanation:
The main difference between Hela cells from other human cells is that a normal cell contains 46 chromosomes whereas HeLa cells contain 76 to 80 (ref) total chromosomes, some of which are heavily mutated (22-25), per cell.
What happens when the involvement of hela takes place?The involvement of hela made to the developing field of genetics is a lot was educated about cell reproduction, DNA and mapping genetics. The hela cells prepared them ideal for use in the polio vaccine trials because they were more liable than other cultured cells.
Cancer cells such as Hela cells escape to normal cell cycle by mutations that lead to the misexpression and/or overexpression of regulatory molecules (e.g., cyclins and cyclin-dependent kinases) and faulty checkpoint control of the cell cycle.
The control of the cell cycle depends on 1-cyclins and cyclin-dependent kinases (CDKs) that regulate the cell cycle by a cascade of protein phosphorylations and 2- a group of checkpoint controls that monitor the completion of critical cellular events.
Therefore, The main difference between Hela cells from other human cells is that a normal cell contains 46 chromosomes whereas HeLa cells contain 76 to 80 (ref) total chromosomes, some of which are heavily mutated (22-25), per cell.
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Why is natural selection not random
Answer : because natural selection helps certain animals to adapt to their current environment
Explanation:
regular reflection is the ________reflection of light on a(n)_________surface.
Answer:
1. parallel ,2. smooth
Explanation:
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state birth control methods according to Islam view?
please help
Answer:
The Qur'an does not refer to contraception explicitly, but Muslims opposed to birth control often quote the Qur'an as saying "
Explanation:
You should not kill your children for fear of want" (17:31, 6:151) and interpret this as including a ban on contraception as well as infanticide.
1 and 2 please i dont know the answers i have more to come
Answer:
1. C.) Their cell walls contain chitin
2. C.) Chloroplast
um so I dont know if this is true bc my dad said it was true but
do blue eyes get sensitive to the bright white snow then brown eyes do?
me my dad and my sister have blue eyes while my mom has brown
Answer:
Yes
Explanation:
They have less pigment to block from UV and Sun rays!
Answer:
yes I believe it is true I have brown eyes tho
explain how the structure of ATP relates to its function
Answer:
ATP functions as the energy currency for cells. ... The structure of ATP is that of an RNA nucleotide with three phosphates attached. As ATP is used for energy, a phosphate group or two are detached, and either ADP or AMP is produced. Energy derived from glucose catabolism is used to convert ADP into ATP.
Which two statements are true of fossilization?
A. Many types of organisms never form fossils.
B. Animals with soft bodies fossilize easily.
c. Conditions must be perfect for a fossil to form. D. All fossils of fish are found near water.
Answer: c and a
Explanation:
Answer:
It's A and C.
Explanation:
The following statement from the video suggests the use of which standard of of science to assess RELIABILITY?
"Simulation experiments can not tell us exactly how life formed in the past, but if
enough of them are done it could eventually tell us if it's possible for life to emerge
from chemistry"
O Replication of Results
O Sufficient Sample Size
O Empirical & Measurable Evidence
O Concept of Falsification
Answer:
I think it’s C Empirical & Measurable Evidence
Explanation:
...
Answer: c
Explanation:
I took the test
What are the potential advantages and disadvantages of a major shift from the hard or traditional path of energy development to the soft or visionary path?
(These were the corresponding textbook pages, if needed) Please read the following from the textbook Environmental Science:
7th Edition - Chapter 17
9th Edition - Chapter 14
Answer:
Advantages of following the soft path, the argument here is alternative sources of power such as hydropower, geothermal energy , wind energy , and photovoltaic cells must be developed. This provides a alternative source to remain in a healthy environment and also function as the society we currently live in using the hard path. Disadvantages of following the hard path result with future generations fearing over the irreversible damage of climate change and the damage done to our atmosphere. The hard path argue that we should continue to operate in the future as we have in the past, except more efficiently. This is close to impossible and will only continue the negative effects the hard path( the path we have been following) results in. The major shift determines the outcome of this world, the futures worries or reliefs and ultimately the survival of humans.
Explanation: