For the cross AaBb X Aabb in which capital letters represent dominant alleles and lower case letters represent recessive alleles, what fraction of the offspring are expected to have the recessive phenotype for the trait determined by gene A and the dominant phenotype for the trait determined by gene B?

First we need to determine the average atomic mass of these isotopes.

The atomic masses of Lithium-6 and Lithium-7 are 6.0151amu and 7.0160amu respectively.

Now that we have that, we need to set up the relative abundance problem.

We can do that using the formula (M1)(x) + (M2)(1-x) = M(E)

Because you asked for details, I'll explain what each variable stands for-

M1 = the mass of one isotope

x = the relative abundance

M2 = the mass of the second isotope

M(E) = the atomic mass of the element from the periodic table

Therefor all we do now is plug in our respective variable.

M1 = 6.0151amu (Lithium-6)

x = unknown relative abundance

M2 = 7.0160amu (Lithium-7)

M(E) = 6.94004amu

Now the formula plugged in will look like this:

6.0151x + 7.0160(1-x) = 6.94004

Now doing some quick math, we can determine that x=0.07589

For the last step we need to find the percent abundance of each element, which is quite simple. We take X and multiply it by 100 to find Lithium-6, so 0.076 x 100 = 7.6%

and since then we use 1 - X, so 1 - 0.076 = 0.924

We take that and also multiply it by 100, so 0.924 x 100 = 92.4%

Conclusion:

The abundance of the Lithium-6 isotope is 7.6%, and the abundance of the Lithium-7 isotope is 92.4%.

Please ask if you have any questions and I hope this was helpful!

Answer:

The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.

Explanation:

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Producers are described as autotrophic, which means they are able to make their own food. Just like producers on land, producers in the marine environment convert energy from the sun into food energy through photosynthesis. Phytoplankton are the most abundant and widespread producers in the marine environment

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Answer:

Explanation:

1-Seeds provide a protective coat so that the embryo plant can develop when it finds a nice piece of soil.

2-Vascular plants are subdivided into two classes: seedless plants, which probably evolved first (including lycophytes and pterophytes), and seed plants. Seed-producing plants include gymnosperms, which produce “naked” seeds, and angiosperms, which reproduce by flowering.

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Answer:

The Seed Coat. The seed coat is one major advantage seeds have over spores. Nourishment. Each seed contains nourishment for the embryo inside the seed.

Explanation:

Answer:

The canopy cover can affect the results of an investigation because a higher canopy cover is accompanied by a decrease in the availability of sunlight.

The canopy cover is the proportion of the ground covered by vegetation when it is viewed from vertically above the planted area.

The level of canopy cover affects light availability on the ground and also its microclimate, thereby this feature can also alter any biological experimental procedure by affecting the level and type of biodiversity.

A reduced canopy cover may alter any experimental outcome by increasing the energy/light input in the ground cover stratum, thereby likely affecting biodiversity.

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The correct answer is option B. Diploid

The secondary nucleus is formed by the fusion of two polar nuclei which is a diploid.

Answer:

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

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                                                  .Stamen.

Structure. As a plant's reproductive part, a flower contains a stamen (male flower part) or pistil (female flower part), or both, plus accessory parts such as sepals, petals, and nectar glands (Figure 19). The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.

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Answer:

50%

Explanation:

To solve this, we'd need to use a Punnett square.  Since the mother has a heterozygous genotype and has an A-blood phenotype, we know that she is AO and the father is AB.

          A             B

A       AA           AB

O      AO           BO

According to this, the four possible blood types, with equal probability are: AA, AB, AO, and BO.  Both AA and AO genes will result in type-A blood, since A is dominant over O.  Therefore, there is a 2 in 4 (or 1 in 2, or 50%) chance of the child having type-A blood.

Answer:

C. weather movement

Explanation:

correct me if im wrong

cellular respiration

Explanation:

A

The wings in birds and insects are not considered as evidence of relatedness because they differ in structures even though their functions may be the same.

Organs in different organisms that are different in structures but similar in functions are referred to as analogous organs. Even though analogous organs serve as evidence of organic evolution, they are indications that organisms differ in the paths taken to evolve.

Some other organs may be similar in structures but different in functions. These types of organs are known as homologous organs and are indications that organisms are kind of related in the path taken to evolve.

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Answer:

casts

Explanation:

casts are formed by filing the cavity of minerals collected from the surrounding

Answer:

i belive the answer is "casts"

Explanation:

Answer:

cathode electrodes.

Explanation:

Electrochemical cells have two conductive electrodes, called the anode and the cathode. The anode is defined as the electrode where oxidation occurs. The cathode is the electrode where reduction takes place.

Answer:a

Explanation:

Answer:

When we gain insight into animal behavior, we are in a stronger position to understand vexing conservation problems, such as how to save endangered species, assess environmental quality, design nature preserves, and evaluate the importance of human-related threats to survival in otherwise fit animals.

Explanation:

Answer:

Genes

Explanation:

The hereditary information (inherited information) is contained in genes, located in the chromosomes of each cell.

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- Heather

Answer:

A A T C G C T G C C T  

T T A G C G A C G G A

U U A G C G A C G C A

Explanation:

Adenine (A) and Thymine (T) pair together. Cytosine (C) and Guanine (G) pair together.

With mRNA, the RNA doesn't have Thymine, so it replaces it with Uracil (U).

Answer:

true

Explanation:

The sodium and chloride ion concentrations are lower inside the cell than outside, and the potassium concentration is greater inside the cell. These concentration differences for sodium and potassium are due to the action of a membrane active transport system which pumps sodium out of the cell and potassium into it.

Answer:

it's a or c but I think it's a

Answer:

The primary enzyme involved in this is DNA polymerase which joins nucleotides to synthesize the new complementary strand.

The viral envelope closely resembles the eukaryotic cell wall. That is option D.

The virus is a type of microorganism that contains DNA (Deoxyribonucleic acid) and surrounded by a protein coat.

There are different types of viruses which include:

The parts of a virus include:

The viral envelope is the external part of the virus, which is made up of proteins and lipids, and is capable of protecting the virus from harm.

Also the cell wall of the eukaryotic cell wall also protects these organisms from external harm.

Therefore, the viral envelope closely resembles the eukaryotic cell wall.

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Answer:

All of the above.

Explanation:

All of these can contribute to sediment accumilation in bodies of water.

Sedimentation accumulation found in water bodies can be the result of fertilizer runoff, pesticides, pesticides, and erosion from agricultural practices. So, the correct option is D.

The sedimentation accumulation may be defined as a process of gathering sediments into the rocks, and water bodies, and increasing their actual mass.

Sedimentation accumulation may be carried by the runoff of fertilizers, pesticides, and insecticides. It also occurred due to the process of soil erosion that takes place during agricultural practices.

Therefore, the correct option for this question is D.

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Answer:

46 chromosomes

Explanation:

There are 46 chromosomes in a typical human body cell. (23 pairs of chromosomes)

how many chromosomes are in a typical human body cell?

46 chromosomes

The normal number of chromosomes in every cell of a typical human body is a total of 46 chromosomes, or 23 pairs.

Answer:

d. All of the above

Explanation: is correct.

Answer:

ALL OF THE ABOVE

Explanation:

Answer:

Foot of a molluscs is used for locomotion and anchorage, and varies in shape and function, depending on the type of mollusk under study.