Explanation:
Humans developed the first planned plant hybrids early in the 18th century, during this period of intense interest in botany and plant anatomy. Collecting plants became a popular pastime for the wealthy and well educated
What is the difference between active transport across a cell membrane and diffusion across a cell membrane?
What part of the cell determines the type and order of the amino acids that make up a protein?
Answer:
The gene, or sequence of DNA, ultimately determines the unique sequence of amino acids in each peptide chain. A change in nucleotide sequence of the gene's coding region may lead to a different amino acid being added to the growing polypeptide chain, causing a change in protein structure and therefore function.
A series of two point crosses is carried out between genes for brown eyes (bw), and arc wings (a), vestigial wings (vg) , ebony body color (e), and curved wings (cv). The following number of nonrecombinant (NR) and recombinant progeny (R) were obtained from each cross.
Genes in cross Progeny (NR) Progeny (R)
a,bw 2224 117
a,cv 2609 823
a,e 3200 3200
a,vg 5172 2379
bw,cv 4614 1706
bw,e 4150 4150
bw,vg 2796 1434
cv,e 3116 3116
cv,vg 2102 305
vg,e 4559 4559
Required:
Using these data form two-point crosses, create a genetic map for these genes, providing the order of the genes and your best estimates of the distances between them.
Answer:
Order of genes: Vg---cv--a---bw---e
Distances among linked genes:
a/bw distance is 4.99 MU bw/cv distance is 26.99 MU a/cv distance is 23.98. a/vg distance is 31.5 MU bw/vg distance is 33.9 MU cv/vg distance is 12.62 MUGene e assorts independently. Its location is symbolical, meaning that it might be in the same chromosome but far away from the rest of the genes, or it might be located in another chromosome.
Explanation:
Due to technical problems, you will find the complete answer in the attached file
10. What changes during a chemical reaction between two compounds?
A. number of atoms
B. chemical bonds
C. total mass
D. total energy
Answer:
I think it's chemical bonds I'm not of that helped
The changes occurs in chemical bond during a chemical reaction between two compounds. The correct option is B.
What is chemical bond?A chemical bond is a long-lasting point of attraction among atoms, ions, or molecules which then allows chemical compounds to form.
Ionic bonds are formed by the electrostatic force between oppositely charged ions, whereas covalent bonds are formed by the sharing of electrons.
A covalent bond is the strongest bond in chemistry. In such bonding, each atom shares electrons that bind them together.
The bonds that hold molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances.
Each bond requires a different amount of energy to break or form; without this energy, the reaction cannot occur, and the reactants remain unchanged.
Thus, the correct option is B.
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In humans, the dominant allele N causes an abnormal shape of the patella in the knee, whereas n is the recessive normal allele. A separate gene is concerned with finger length, and the dominant allele B causes abnormally short fingers, whereas b is the recessive normal allele. A study focused on people who have both abnormal patellae and short fingers. These individuals were N/n . B/b in genotype, having inherited the N allele from one parent and the B allele from the other parent. These N/n . B/b people mated with normal spouses, producing 40 progeny classified as follows: Normal 3 Abnormal knees and short fingers 2 Abnormal knees only 17 Short fingers only 18
Explain why the four types of children were found in the proportions shown.
Draw the chromosomes of (i) the parents of the N/n . B/b individuals; (ii) the N/n . B/b individuals; and (iii) the four types of children, showing the proper positions of the alleles based on the data above.
Answer:
1) Children were found in the proportions shown because the two genes are linked, they do not assort independently from each other
2) The chromosomes draw is in the attached file
Explanation:
Due to technical problems, you will also find the explanation for the first question in the attached files (PDF).
What is the highest possible temperature?
Where does gravity come from? How does an object's mass shape the fabric of
spacetime?
Answer:
Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body.
Every object in the universe pulls on the space around it, drawing the fabric of space-time toward its center.
Answer:
gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight.
Every object in the universe pulls on the space around it, drawing the fabric of space-time toward its center. The more massive the object, the more it pulls. ... The physicist John Wheeler captured these odd notions
Carbon is getting stuck in reservoirs (atmosphere and ocean) which is leading to climate
change. Which of the following is not a reason for this issue?
O Decrease in plants means more carbon in the atmosphere
Increase in plants means more carbon in the atmosphere
O Less organisms in the oceans prolongs decomposition trapping carbon in the ocean
O Increased use of factories and burining of fossil fuels increases amount of carbon in the
atmosphere
Answer:
Increase in plants means more carbon in the atmosphere
Explanation:
The second option is not a reason for the issue. This is because plants remove carbon from the atmosphere for their life processes.
During the process of photosynthesis, green plants manufacture their food in the presence of sunlight using water and carbon dioxide.
Plants do not trap carbon. They ensure the movement of carbon in nature. Other choices shows how carbon get trapped in the atmosphere and ocean.two products of the krebs cycle are
Answer: The correct answer is NADH and FADH2.
Plz mark brainliest:)
Two products of the Krebs cycle are NADH and FADH2.
What is the Kreb's Cycle?The Krebs cycle is a form of chemical reaction that is meant to convert the energy stored in the body in the form of acetyl CoA to other constituents.
Some products of the Krebs Cycle also known as the Citric acid cycle are Nicotinamide adenine dinucleotide and Flavin adenine dinucleotide. The energy released is from carbohydrates and fat.
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A man has blood group A and his wife has blood group B. Their first child has
blood group AB and the second child has blood group O. What can one conclude
about the blood groups of their future children?
(3)
I
(9)
Answer:
Their future children can have blood group AB, O, A or B
Explanation:
since the husband had blood group= Heterogeneous A means AO
and,
the wife's blood group= Heterogeneous B or BO
so by crossing between them, we get this result.Which of the following diseases causes dogs to have a chronic cough?
Answer:
What are the following diseases?
Explanation:
What are the following diseases?
Which statement BEST explains why the Moon is visible from the Earth?
1) The Moon reflects light from the Sun.
2) The Moon is always lit up by the Sun for us to see.
3) The Moon reflects light from the Earth.
4) The Moon produces its own light through radiation.
which of the following is considered a condition of the nervous system and not a disease of the nervous system?
celebral palsy
epilepsy
multiple sclerosis
parkinson's
Which of the following is TRUE about the fossil record? Group of answer choices It is sadly incomplete and lacking in all transitional forms. It gives useful information about environments and the ways past organisms lived. Only animals with hard skeletons are preserved. It is best in deep forests where dead organisms have not been disturbed.
Answer:
It gives useful information about environments and the ways past organisms lived
Explanation:
A fossil is basically any preserved remains or trace of any organism that once lived in the past. Bones, shells and exoskeletons are examples of fossils that can be studied through Paleontology.
From fossil studies, we can tell how long these lives existed on earth and how varying plants and animals are related to one another. We can often find out how and the places they lived and their environments as well.
Why would lysosomes help a cell MORE THAN the Golgi Body? Think about the functions of the two organelles.
A.
lysosomes pack up proteins that the cells needs and transports them to different parts of the cell
B. lysosomes move throughout the cell and keeps the cell healthy by breaking down waste and toxins
Ο Ο Ο
C.
lysosomes control the activity of the rest of the cell
D. lysosomes storage water and nutrients that the cell needs in order to survive
How would the absence of an atmosphere on Earth affect meteors?
Answer:
Meteors would not cause visible streaks of light
Explanation:
I just got it right in my quiz:)
You remove pus from a wound and try to identify the pathogen multiple ways. The multi-locus gene tree showed your organism was most closely related to Streptococcus pyogenes but the 16S tree said it was most closely related to Streptococcus pneumoniae. Describe why this might be the case and other ways you should try to identify this organism.
Answer:
It occurs because phylogenetic analyses based on the 16S rRNA gene sequences may have insufficient resolution for distinguishing between closely related species
Another genomic method for streptococcal identification is whole-genome analysis (WGS)
Explanation:
The phylogenetic analysis of the highly conserved 16S rRNA gene sequences has recently been used to distinguish between prokaryotic species. However, this gene sometimes may show low resolution to distinguish between closely related species, and it has been suggested potential horizontal transference of rRNA genes. Moreover, multi-locus sequence analysis (MLSA) has also been used to identify species. MLSA analysis consists of analyzing simultaneously different genes and this technique has shown to have a high capacity for establishing relationships between species within a genus or genera within a family. Finally, whole-genome analysis (WGS) is the most powerful tool for distinguishing between closely species. WGS is a technique that provides a very high resolution which is based on the analysis of large-scale genome sequencing data generated by next sequencing generation (NGS) technologies.
TEHS 2020-2021
Section 1
3 of 103 of 10 Items
Item 3
The organelle shown consists of a stack of flattened membranes.
What is the primary function of this organelle?
attaching amino acids to tRNA molecules
attaching amino acids to tRNA molecules
long-term storage of molecules in the cell
long-term storage of molecules in the cell
production of large and small ribosomal subunits
production of large and small ribosomal subunits
repackaging proteins for export from the cell
repackaging proteins for export from the cell
TEHS 2020-2021
Section 1
3 of 103 of 10 Items
Item 3
The organelle shown consists of a stack of flattened membranes.
What is the primary function of this organelle?
attaching amino acids to tRNA molecules
attaching amino acids to tRNA molecules
long-term storage of molecules in the cell
long-term storage of molecules in the cell
production of large and small ribosomal subunits
production of large and small ribosomal subunits
repackaging proteins for export from the cell
repackaging proteins for export from the cell
TEHS 2020-2021
Section 1
3 of 103 of 10 Items
Item 3
The organelle shown consists of a stack of flattened membranes.
What is the primary function of this organelle?
attaching amino acids to tRNA molecules
attaching amino acids to tRNA molecules
long-term storage of molecules in the cell
long-term storage of molecules in the cell
production of large and small ribosomal subunits
production of large and small ribosomal subunits
repackaging proteins for export from the cell
repackaging proteins for export from the cell
What is the primary function of this organelle?
attaching amino acids to tRNA molecules
attaching amino acids to tRNA molecules
long-term storage of molecules in the cell
long-term storage of molecules in the cell
production of large and small ribosomal subunits
production of large and small ribosomal subunits
repackaging proteins for export from the cell
Question:
The organelle shown consists of a stack of flattened membranes.
What is the primary function of this organelle?
attaching amino acids to tRNA moleculeslong-term storage of molecules in the cell production of large and small ribosomal subunits repackaging proteins for export from the cellAnswer:
repackaging proteins for export from the cellExplanation:
The organelle consisting of a stack of flattened membranes is the Golgi apparatus.
The Golgi apparatus is like the packaging centre of the cell. It modifies, sorts, and packages proteins and from the endoplasmic reticulum to be stored in the cell or released outside the cell
Which products do not have scientific studies supporting their claims to be beneficial when used?
A. Cofactors and coenzymes to support enzyme function
B. Lactase enzymes used in milk sugar digestion
C. Enzyme that aids in the digestion of oligosaccharides
D. Enzymes to promote immune system function
Select the correct answer.
Snakes shed their outermost layer of skin regularly. Which characteristic of life is this action an example of?
A.
excretion
B.
growth
C.
homeostasis
D.
nutrition
E.
reproduction
Answer:
growth
Explanation:
Which line points to the myelin sheath?
Answer:D
Explanation:
What is a map? How are maps used, and what is their purpose?
Answer:
Reference maps show the location of geographic boundaries, physical features of Earth, or cultural features such as places, cities, and roads.
Explanation:
Answer:
It is a representation of a place in which the relationship toward time and space is perceived. The purpose of maps are to provide visual representations of the physical features of the Earth to teach and guide. Maps are used to navigate from one place to another, to know the location of an area or region, and to measure distances from certain locations.
Explanation:
What is the structure shown in the figure?
Nucleic Acids
Carbohydrates
Proteins
Lipids
Answer:
lipids
Explanation:
Which of the following bones are considered to be the MOST proximal?
metatarsals
clavicle
ulna
olecranon
Answer:
Of the group of bones mentioned, the most proximal is the clavicle, which is part of the shoulder girdle.
Explanation:
Proximal is a reference term used in anatomy to indicate the structures that are closest to the center of the body.
The bones mentioned -clavicle, olecranon, ulna and metatarsals- are related to the function of the limbs. The clavicle is the closest bone to them, located between the neck and the thorax, on each side of the midline of the body.
Regarding the other options, other bones are distal, as they move away from the center of the body. In order from less distal to more distal they are found:
Olecranon, which is a bone eminence of the ulna, in the upper limb. Ulna or cubitus, which is part of the bones of the forearm. Metatarsals are the bones that form part of the foot.Which of the following is an example when an uncontrolled experiment is best?
When testing the effect of water on a lawn
When working with the human body
When testing the effect of sugar on a starch
When testing plant growth
Answer:
When working with the human body , I had the test so..
Explanation:
Uncontrolled: If an extraneous variable is not controlled for (held constant) its effects become confused with or confounded with the effects of the independent variable. It then has an unwanted effect on the dependent variable and is termed a confounding variable .The researcher can no longer draw conclusions regarding the causal
Giving brainliest:)
I need help on this please I will give brainlist
Answer
B
Explanation:
biodiversity in the productivity of organisms if there is more it will recover faster
A cold front creates what kind of weather?
Answer:
A cold front creates nasty weather.
Explanation:
1. Rain
2. Thunderstorms
3. Gusty winds
4. Tornadoes
Which direction below is a step in preparing a wet-
mount slide?
O Press a specimen and a drop of water
between two glass microscope slides.
O Insert a drop of water between a cover slip
and the glass slide.
O Add a drop of water onto a specimen, and
place a cover slip on top.
Add a drop of water onto a specimen on a
glass slide, and clip it onto the microscope
stage.
Answer:
O Add a drop of water onto a specimen, and
place a cover slip on top
Надеюсь это поможет
Answer:
C.) Add a drop of water onto a specimen, and place a cover slip on top.
What is the protozoan and who is the first to observe one?
Answer:
Protozoa is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. Anton van Leeuwenhoek was the first person to see protozoa, using microscopes he constructed with simple lenses. Between 1674 and 1716, he described, in addition to free-living protozoa, several parasitic species from animals, and Giardia lamblia from his own stools.