Answer:
Threats to the tundra biome
The oil, gas, and mining industries can disrupt fragile tundra habitats. Drilling wells can thaw permafrost, while heavy vehicles and pipeline construction can damage soil and prevent vegetation from returning. This activity also increases the risk of toxic spills.
What is the environment like in the tundra?
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy, and rainfall is scant. Tundra lands are covered with snow for much of the year, but summer brings bursts of wildflowers.
Explanation:
Brainliest please?
Answer:
The tundra biome is good for the environment because it keeps the temperature regulation of our earth. It is bad for the environment because it is turning into a source of greenhouse gas emissions.
Explanation:
what is the process called in which one type of rock can change into another type of rock?
what is the difference between magma and lava
which statement is describes earth quakes?
A:glacier materials are moved by gravity
B:pressure forces magma out of an opening in earths crust
C:preesures in earths crust causes layers of rock to slide
Answer:
2) Magma is underground and lava is above ground.
3)C
If a DNA strand is composed of 30% adenine (A), how much thymine (T) would be present out of 100%?
Group of answer choices
30%
70%
20%
40%
Answer:
70%
Explanation:
Use the list of words and place them under the correct category (DNA, RNA, or Both)
Deoxyribonucleic Acid, Double Helix, Uracil, Double Stranded, Deoxyribose Sugar, Thymine, Pyrimidines, Copy the Instructions and Make Proteins, Ribose Sugar, Instructions for making proteins, Located in Nucleus of Eukaryotes, Cytoplasm, Ribosomes, Nucleic Acid, 3 Types, Adenine, Nucleotide is the monomer, 5-Carbon Sugar, Phosphate Group, Guanine, Cytosine, Single Strand, Genetic Information, Ribonucleic Acid
Dna
Rna
Both
Answer:
DNA: Deoxyribonucleic Acid, Double Helix, Double Stranded, Deoxyribose Sugar, Thymine, Instructions for making proteins, Located in Nucleus of Eukaryotes, Genetic Information,
RNA: Uracil, Copy the Instructions and Make Proteins, Cytoplasm, Ribosomes, Single Strand, Ribonucleic Acid, Ribose Sugar
Both: Nucleic Acid, 3 Types, Nucleotide is the monomer, 5-Carbon Sugar, Phosphate Group, Pyrimidines, Adenine, Guanine, Cytosine,
Explanation:
DNA or deoxyribonucleic acid, and RNA ribonucleic acid are made up of nucleotides, molecules that are essential to life- DNA stores genetic information, while RNA is important for facilitating the translation of DNA's information to proteins.
Nucleotides are monomers composed of DNA, a nucleic acid that serves as a storage molecule to encode proteins, along with RNA, a ribose sugar-containing nucleotide. In nucleotides, 5-carbon deoxyribose or ribose sugar, phosphate and one of four bases of nitrogen are found:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).
Uracil (U) found in RNA
prenatal kynurenine exposure in rats: age-dependent changes in nmda receptor expression and conditioned fear responding
Rationale: Levels of kynurenic acid (KYNA), an endogenous terrible modulator of alpha 7 nicotinic acetylcholine receptors (α7nAChRs) and antagonist at glutamatergic N-methyl-D-aspartate receptors (NMDARs), are expanded in the talent of patients with schizophrenia (SZ). In rats, dietary exposure to KYNA's immediately precursor kynurenine at some stage in the final week of gestation produces neurochemical and cognitive deficits in maturity that resemble these viewed in patients with SZ.
Objectives: The current experiments examined whether prenatal kynurenine publicity results in age-dependent adjustments in the kynurenine pathway (KP), expression of selected receptors, and cognitive function.
Methods: Pregnant dams have been fed unadulterated mash (progeny = ECON) or mash containing kynurenine (100 mg/day; progeny = EKYN) from embryonic day (ED) 15 to 22. Male offspring have been assessed as juveniles, i.e., prior to puberty (postnatal day [PD] 32), or as adults (PD70) for intelligence KYNA levels, α7nAChR and NMDAR gene expression, and performance on a hint worry conditioning (TFC) task.
Results: KYNA degrees have been similar between juvenile ECON and EKYN rats, whereas EKYN adults exhibited a ~3-fold amplify in intelligence KYNA relative to ECONs. NR2A expression was constantly reduced (30-40 %) in EKYN rats at each ages. Compared to ECON adults, there used to be a 50 % reduction in NR1, and a vogue toward diminished α7nAChR expression, in grownup EKYN rats. Surprisingly, juvenile EKYN rats performed considerably higher in the TFC paradigm than controls, whereas person EKYN animals confirmed the estimated deficits.
Conclusions: Collectively, our results provide evidence that KP changes in the fetal talent alter neuronal improvement and cause age-dependent results on neurochemistry and cognitive performance.
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pleasa answer asap and be correct
I pour boiling water at 100 degrees Celsius into a cup at 50 degrees Celsius. Once the water touches the cup, the cup starts to heat up and the water starts to cool down... Eventually both the water and the cup will reach what temperature?
Answer:
75 degrees Celsius
Explanation:
Assuming that there is no heat lost to the surrounding, heat energy would move from the water to the cup until an equilibrium temperature is reached. At equilibrium, both the water and the cup would have the same temperature the sum of which would be equal to the sum of their initial temperatures.
Sum of initial temperatures = 100 + 50 = 150 degrees Celsius
At equilibrium, the temperature is divided equally; 150/2 = 75 degrees Celsius
Hence, both the water and the cup will reach 75 degrees Celsius temperature.
This process of heat transfer by conduction would NOT work ____
A) in space
B) in a solid
C) under water
D) in the atmosphere
Answer:
under water
Explanation:
the conduction between the two materials will be interrupted if it is under the water.
(03.05 MC)
In which of the following ways is DNA replication similar to transcription?
Answer: D. Thymine is used in replication while uracil is used in transcription.
Explanation:
Genetic information is stored in double-helixes of DNA molecules (Doxyribonuclease). In replication, two daughter strands of DNA are copied from the parent strand, while in replication, instructions stored within DNA are copied into a different form, called mRNA or messenger RNA.
Nucleotides are monomers comprising DNA, a nucleic acid that along with RNA, a ribose sugar-containing nucleotide, acts as a storage molecule to encode proteins. 5-carbon deoxyribose or ribose sugar, phosphate and one of four nitrogen bases are found in nucleotides:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).
Uracil (U) found in RNA
While both contain four nucleotide bases, in RNA, uracil replaces thymine... The DNA nucleotides are involved in replication while RNA nucleotides drive transcription,
sorry ikyou can't see well but please help I am on a timer!
Answer:
I think your best bet is B.
Explanation:
It makes the most sense to me, but im not sure.
Answer:
it is b as the digestive system breaks down food and the circulatory system takes blood and nutrients around the body
19. The layers of the skin are..........
epidermis only
dermis only
hypodermis
epidermis and dermis
eukaroyitic cells and prokaroytic cells describe 3 ways that the two types differ. what do you think is the biggest misconception between the 2 cells course hero
eukaryotic cells and prokaryotic cells differs in presence of nuclear membrane structure, membrane bound organelles and size of ribosomes.
prokaryotic cells are unicellular structure with smaller size. They do not have well defined nucleus and membrane bound organelles like endoplasmic reticulum, mitochondria, chloroplast, etc. They have smaller ribosomes and simpler flagella. They also have plasmid in the cytoplasm.
Eurkaryotic cell bigger in size. They have well-defined nucleus with membrane bound organelles like endoplasmic reticulum, mitochondria, chloroplast, etc. They have bigger ribosomes and complex flagellar structure. They rarely have plasmid in cytoplasm.
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What is the common ancestor of crocodiles and turtles?
Answer:
alligator
Explanation:
what type of energy is wind captured by wind turbines?
biotic
renewable
nonrenewable
none of the above
Answer:
None of above
Explanation:
Its kinetic energy
Which choice below is NOT a biomolecule?
O Carbohydrates
O Lipids
O Nucleic Acids
O Proteins
O Water
Answer:
water
Explanation:
carbohydrates are used for short term energy
lipids are used for storing energy
nucleic acids are used to storage and expression of genetic information
proteins are used to build or repair muscles
PLEASE HELP .!!! ILL GIVE BRAINLIEST.. *EXRTA POINTS* .. DONT SKIP :(( !
ILL GIVE 30 POINTS .
Answer:
D. The two species will coexist with no competition
Answer:
C is the answer... i took the test
can i have brainlyest?
Explanation:
They match and can i have 30 points now?
Cytoplasm is found...
A only in prokaryotic cells.
B in all cells.
C. in plant cells only.
Answer:
C i think
Explanation:
sorry if its wrong :(
What is the importance of rRNA??
Answer:
It makes up the ribosome.
Explanation:
These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis.
Which of the following are examples of passive transport? Select all that apply.
1 exocytosis
2 membrane pumps
3 facilitated diffusion
4 diffusion
5 osmosis
Facilitated diffusion, osmosis and diffusion are examples of passive transport
WHAT IS PASSIVE TRANSPORT?
Passive transport is a kind of transport that does not require the input of energy (ATP). The examples of passive transport there is are as follows:Osmosis: Osmosis is the movement of water from a region of high concentration to a region of low concentration via a semipermeable membrane. Since, water is moving down a concentration gradient, no energy is required. Diffusion: This is the movement of molecules from a region of higher concentration to a region of lower concentration. No energy is required for this to occur as well. Facilitated diffusion: Facilitated diffusion is a kind of diffusion that occurs with the aid of transport proteins. It also does not require energy input.Therefore, facilitated diffusion, osmosis and diffusion are examples of passive transport.
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Which of the following is Not a correct DNA base pairing rule
Answer:
We can't see the options, how are we supposed to give you an answer without knowing anything?
pleasse help me! giving crown!
Answer:
the answer is delition
Explanation:
Which mode of inheritance results in a heterozygote having a phenotype that is distinct from both homozygotes?.
Because both alleles (of homozygotes) exist in the progeny, codominance is also known as no dominance in some circumstances (heterozygote). As a result, the phenotype generated differs from the genotypes of the homozygotes.
The dominance in which the two alleles or characteristics of the genotype (of both homozygotes) are displayed jointly in children is referred to as codominance (phenotype). In cross-breeding, there is no dominant or recessive allele. Rather, the two alleles coexist and are generated as a combination of both alleles (that each allele has the tendency to add phenotypic expression during the breeding process).
Plants with white as the recessive allele and red as the dominant allele produce blooms with pink and white patches following cross-breeding, which is an example of codominance.
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The point where separation of the DNA occurs is called the replication fork.
True
False
Answer:
True
Explanation:
The point where the separation of the DNA occurs is called the replication fork. Therefore, it is true.
What is a replication fork?The DNA double helix of a cell has been unwound and split into the replication fork, which is where DNA polymerases and other enzymes can work.
DNA helicases unwind DNA at locations known as origins during DNA replication, where synthesis will begin. The replication fork, so named because the two strands of DNA seem forked as they are unzipped apart, is a structure that is created while DNA helicase proceeds to unwind the DNA.
A replication bubble is created when the circular bacteria chromosome's double-stranded DNA is opened at the point of replication. A replication fork, a Y-shaped junction where double-stranded DNA is split into two single strands, is present at each end of the bubble. Therefore, it is true.
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I need help on these two pls help
Answer:
7.C
8.A
Explanation:
what part of the body uses a lot of enzymes ?
Answer:
salivary glands, and digestive systems
Explanation:
For example, enzymes are required for a proper digestive system function. Digestive enzymes are mostly produced in the pancreas, stomach, and small intestine. But even your salivary glands produce digestive enzymes to start breaking down food molecules while you're still chewing.
can elephants die from sand in their eyes
Answer:
look it up, also i dont think they do
Explanation:
i needed points...sorry :<
Explain the process of photosynthesis.
Answer: during photosynthesis plants take place in carbon dioxide
Explanation:
it is
BRAINLIEST: Explain the process of convection that rock in the mantle of Earth undergoes. 2-3 sentences
Answer:
Can you please help me with something?
Explanation:
Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface.
The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle. The lithosphere is divided into a number of tectonic plates that are continuously being created or consumed at plate boundaries. Accretion occurs as mantle is added to the growing edges of a plate, associated with seafloor spreading. This hot added material cools down by conduction and convection of heat. .
Organisms that eat fragments of dead matter in an ecosystem, return nutrients to the soil, air, and water where the nutrients can be reused by organisms are
called blank
Answer:
Decomposers play a critical role in the flow of energy through an ecosystem. They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers.
Why are vaccines not convenient for everyone?
Why is a protein inactive when it is denatured