Answer:
nucleus
Explanation:
2. In which leaf layer does most photosynthesis occur?
Which of the following is the mean number per cross of F2 generation offspring that are the result of crossing over
Answer:
2.2
Explanation:
Since all of the mice in the F1 generation are heterozygous for both traits, they contain a copy of each on separate chromosomes. (AB on one from parent 1 and ab on the other from the parent 2.) If these chromosomes split away from each other without crossing over, the F2 offspring can ONLY by AABB or aabb. This means that any heterozygous combinations are the result of crossing over and must be counted. When all are counted, we get a total of 11, or 2.2 per cross.
To calculate the mean number per cross of the offspring that result of crossing over, we need to make an addition of individuals that result from crossing-over, and divide the result by the number of crosses. The result is 2.2.
---------------------
According to the statement, crosses were as follow
Cross 1) Between two true-breeding
Parentals) LLBB x llbb
F1) 100% LlBb
Cross 2) Between two dihybrids
Parentals) LlBb x LlBb
The results of the F2 are
Phenotype Cross1 Cross2 Cross3 Cross4 Cross5
Long-Black 6 5 5 6 7
Long-White 1 1 0 2 2
Short-Black 0 2 1 1 1
Short-White 2 3 3 2 2
If there is no crossing-over, offspring will have the same chromosomes as parentals, which are Long-Black (LB) or Short-White (lb), because these chromosomes separate without interchanging segments.
However, if there is crossing over, these chromosomes interchange segments, and the result is Long-White (Lb) and short-black (lB).
So now, we need to count how many individuals from the F2 are a result of crossing-over.
Phenotype Cross1 Cross2 Cross3 Cross4 Cross5 Total
Long-White 1 1 0 2 2 6Short-Black 0 2 1 1 1 511
Eleven individuals result from crossing over. But we need to calculate the mean number per cross.
So, since there are 5 crosses, we need to divide the total number of individuals that are the result of crossing over by the total number of crosses.
total number of individuals = 11total number of crosses = 5Mean number per cross of F2 generation ⇒ 11/5 = 2.2
The mean number per cross of F2 generation offspring that are the result of crossing over is 2.2
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You can learn more about crossing-over at
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Which of the following is true about multicellular organisms?
Their cells are all exact copies
Their cells are prokaryotic
Their cells can all switch to the same cell type
Their cells can be specialized for specific functions
Answer:
Cells can be specialized for specific functions.
Explanation:
I hope that helps
EASY BIO QUESTION
15 PTS WILL MARK BRAINLIEST
Which is the best description of carbohydrates?
biomolecules made up of amino acids
biomolecules made up of nucleic acids
hydrophilic molecules that provide energy for the body
hydrophilic molecules that are part of the cell membrane
Answer:
hydrophilic molecules that provide energy to the body.
Explanation:
because looked in my study book, then asked my teacher.
Question 4 (1 point)
Why does Rachel Skinner think delivering the coronavirus vaccine will be a challenge?
b
Needles cannot be used to give people the coronavirus vaccine
It will need to be given to elderly people who have delicate skin,
The microneedle patch still needs to be tested in clinical trials.
Many people will need to be vaccinated in a short period of time,
Od
Answer:
I believe the answer is D.
Explanation:
I believe the biggest challenge will be getting everyone vaccinated and in a short period of time.
Why is a microscope needed in order to study cells?
HELP ME!!!
Answer:
to small
Explanation:
the cells are to small to see with the naked eye so they need to be magnified
Which of the following is an example of a literary text?
a.
memoirs
c.
novels
b.
plays
d.
all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
I think the correct answer is C novels.
what do we call gut friendly microorganisms that live in the intestines and help with digestion?
E. coli
probiotics
enzymes
HCI
Answer:
Enzymes
Explanation:
Can someone please help me. WILL MARK U BRAINLIEST!!!
Answer:
1) is answer A
2)B
3) D
Explanation:
Need help placing the rest of these plz.
Select all that apply.
What do glucose, starch, and cellulose have in common?
They are all carbohydrates.
They are all related to photosynthesis.
They are various forms of sugars.
They are various forms of proteins.
Answer: They are all carbohydrates.
Explanation:
What are possible origins of Earth's surface and internal energy?
Answer:
The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.
(15 points) Aerobic cellular respiration takes place in the mitochondria and uses oxygen to break down glucose. However, when cells need large amounts of energy and no oxygen is available, anaerobic respiration can take place in the cytoplasm. What is the difference in the products of aerobic and anaerobic cellular respiration?
Answer:
There are two kinds of respiration: Aerobic and Anaerobic. ... Aerobic respiration takes place in the presence of oxygen, produces a large amount of energy. Carbon dioxide and water are produced as the waste products. Anaerobic respiration takes place without the use of oxygen, produces small amounts of energy.
Explanation:
I looked it up for u :D
What does the word "mutation" mean
Answer:
A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses
Explanation:
here is!!
Answer:
The action or process of mutating.
PLSSS HELP ILL GIVE 100 POINTS PLSSS HELPPP
Include a Claim, Evidence, Explanation, and Conclusion for full credit.
Cells were obtained from a patient with a viral infection. The DNA extracted from these cells consisted of two forms: double-stranded human DNA and single-stranded viral DNA. The base composition of these two forms of DNA are shown in the image.
Construct an argument based on evidence to determine which form was the viral DNA and which form was the human DNA.
Answer:
TGCA
Explanation:
Which of the following is NOT present in both prokaryotes and
eukaryotes? *
Presence of a Golgi body
Presence of DNA
Ability to maintain homeostasis
Ability to produce ribosomes
Answer:
Prokaryotes do not have a golgi
Explanation:
eukaryotes have a Golgi apparatus but prokaryotes do not
Carbohydrates are made up of the following elements?
Nitrogen
Carbon
Hydrogen
Oxygen
Answer:carbon
Explanation:
Awnser:
Carbon is the awnser
Why is DNA’s shape considered a “double helix,” but RNA’s structure is not considered a double helix?
What animals do whales have similar characteristics too?
A. Monkeys and Gorillas
B. Bison and Pigs
C. Sharks and barracudas
Answer:
Bison and Pigs
Explanation:
According to molecular evidence, the closest living relatives of whales are, quite surprisingly, the artiodactyls a group of hoofed animals
Approximately how many degrees does Earth
travel in its orbit in one month?
A. 1°
B. 15°
C. 30°
D 360°
Earth moves about 1 degree in one day. Multiply that by 30 days so the Earth moves about 30 degrees in one month.
if there was no glucose available for plant and animal cells what would happen?
Answer:
Glucose is a sugar that many plants, animals and fungi use for energy. In plants, glucose is produced as a result of photosynthesis. Plants need the energy glucose provides in order to grow and reproduce. ... Without glucose, plants would not have the energy necessary to grow, reproduce or carry out cellular respiration.
Explanation:
UwU Hope I helped
True or false, in a food web, the arrows point from one organism to the organism it eats?
Answer:
False
Explanation:
In a food wed the arrows point to the animal that will eat the organism, it's pointing away from
Answer:
False
I hope this helps!
if the moms blood type is AA and the dads blood type is BB what will the kids blood type be
Answer:
AB
Explanation:
I think because i am pretty sure it'll be 50/50
suggest why digestion (the breakdown of large macromolecules) is largely performed by extracellular enzymes
Answer:
Enzymes speed up the breakdown of macromolecules in food to small molecules
Explanation:
During digestion, the macromolecules that make up food are hydrolyzed by digestive juices to molecules of a size that allows their absorption through the lumen of the tract. In this way, proteins are divided into amino acids, carbohydrates into glucose and other monosaccharides, and fats into glycerol and fatty acids. Digestion and absorption take place mainly in the small intestine.The production of extracellular enzymes that, once released into the medium, degrade the substrate and then allow their diffusion / transport.
ribose sugar is used to make nucleic acid however, it is not formed directly in photosynthesis but is formed from glucose. How does glucose form ribose?
Answer: Ribose is synthesized from glucose and other monosaccharide molecules in living cells by a process known as pentose phosphate pathway. The pentose phosphate pathway is a series of chemical reactions taking place in the cytosol of cells.
Glucose forms ribose through a series of chemical reactions, including the conversion of glucose-6-phosphate to ribose-5-phosphate.
What is ribose sugar?Ribose sugar is a five-carbon sugar molecule that is an important building block of nucleic acids, such as RNA and DNA. It is a type of carbohydrate and is structurally similar to glucose, but has a different chemical arrangement.
Ribose is synthesized in the body through a series of metabolic reactions, starting with glucose, and is also found in some natural sources such as ribose supplements. It is important for the production of energy in cells, the regulation of gene expression, and the synthesis of nucleotides.
Learn more about ribose sugar, here:
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Which answer choice has the correct information?
Group of answer choices
1 Ly = 9.5 trillion km,1 AU = Distance from Earth to Sun (150,000 million Km)
1 Ly = 9.4 trillion km; 1 AU = Distance from Earth to Moon (150,000 million Km)
1 Ly = 9.5 trillion miles,1 AU = Distance from Earth to Sun (150,000 million Km)
1 Ly = 9.5 trillion miles, 1 AU Distance from Earth to Moon (150,000 million Km)
Answer:
1 ly = 9433962264150.9 km
Please help. 50 points.
Answer:
I dont understand
Explanation:
i need more information to answer the question sorry
Which nucleotides can pair together? Select all that apply. adenine (A) & cytosine (C) cytosine (C) & guanine (G) cytosine (C) & thymine (T) adenine (A) & thymine (T) adenine (A) & guanine (G) thymine (T) & guanine (G)
The nucleotides which base pairs together in the DNA helix are adenine(A) to the thymine (T) and Cytosine(C) to the Guanine (G). A purine always base pairs against a pyrimidine.
What are nucleotides?Nucleotides are the monomeric units of the genetic material i.e., DNA present in the nucleus of cell. Nucleotides are made up of three components which include a nitrogenous base, a deoxyribose sugar in case of DNA or a ribose sugar in case of RNA, and a phosphate group moiety.
The nitrogenous bases are of two types on the basis of their structures: Purines and Pyrimidines. Purines are double-ring structures which contain an imidazole ring attached to a pyrimidine ring. This include Adenine and Guanine. Pyrimidines are single-membranous structures which are similar to pyridine. Pyrimidines include cytosine, thymine and uracil. In DNA, thymine is present whereas in RNA, uracil is present.
A purine always base pairs with a pyrimidine. In case of DNA, an adenine forms two hydrogen bonds to base pair with thymine and vice versa whereas guanine forms three hydrogen bonds while pairing with cytosine residues and vice versa.
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Which of the following is true about RNA?
tRNA brings in an amino acid and bonds with mRNA
mRNA carries the code of rRNA to the nucleus.
mRNA is made from tRNA during transcription.
rRNA helps tRNA make a copy of the DNA gene.
Answer:
the right answer is
tRNA bonds with mRNA, bringing in amino acids.
Explanation:
Ribonucleic acid is a single-stranded structure. The true statement is tRNA brings in an amino acid and bonds with mRNA. Therefore, the correct answer is option 1.
The Transfer RNA, or tRNA, transports amino acids to the ribosomes, the cell's protein-making factories, during the synthesis of proteins. An anticodon, which is a particular set of nucleotides on each tRNA molecule, is complementary to the codon on the mRNA (messenger RNA) molecule. From the DNA in the nucleus to the ribosomes in the cytoplasm, the mRNA transports the genetic information.
The tRNA with the complementary anticodon brings in the exact amino acid that is coded by that codon when the ribosomes read the codon on the mRNA. In order for the ribosomes to assemble the amino acids into a protein chain in the proper sequence, the tRNA molecule then forms a connection with the mRNA.
Therefore, the correct answer is tRNA brings in an amino acid and bonds with mRNA, i.e. Option 1.
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A child is diagnosed with a rare genetic disease. Neither parent has the disease. How might the child have inherited the disorder?
Answer:
Recessive genes.
Explanation:
Both parents were likely carriers of the rare disease, but dominant traits allowed them not to be affected by it.