2. Sickle Cell Anemia is inherited as an autosomal recessive trait. What would be
the chances of a non-carrier female and a man with sickle cell anemia having
afflicted children?
a) Assign Symbols
b) Show the cross
c) Punnett square
d) Genotypic ratio
e) Phenotypic Ratio

Let's take a look at the diagram for the cell cycle:

Recall that the order is from G1 phase to Telophase, where cells ready to undergo cell division start in interphase.

Let's define our answer choices:

0. Shrinkage of the nucleus

1. DNA duplication

2. Cytokinesis

3. DNA segregation

We are trying to find which of these answer choices occurs before cell division (which is known as mitosis/meiosis depending on the type of cell).

We can see from the cell cycle diagram that the stages before mitosis would be the G2 phase, the S phase, and the G1 phase.

Let's go through each of our answer choices:

0. Shrinkage of the nucleus - this answer choice ,never, happens in the cell cycle. The nucleus ,dissipates, or ,dissolves, away when the cell is ready to undergo mitosis.

1. DNA duplication - this answer choice is ,correct,. DNA duplication occurs during the ,S phase,, which is ,before, mitosis (cell division).

2. Cytokinesis - this is when the 2 cells during mitosis split and become 2 separate cells. This would signify the ,end, of mitosis, so this answer ,would not be correct,.

3. DNA segregation - this answer choice happens ,during, mitosis. Therefore, this answer choice is not correct.

Therefore, our answer choice is B.

Answer:

You can use your data to estimate the duration of each phase of the cell cycle. For example, if 8% of the cells were in prophase and the cell cycle was 10 hours long, then prophase would last 8% of 10 hours or 0.8 hours

explanation:

Answer: Criminal Case

Explanation: In a criminal case, the prosecution bears the burden of proving that the defendant is guilty beyond all reasonable doubt. This means that the prosecution must convince the jury that there is no other reasonable explanation that can come from the evidence presented at trial

Remember that by definition, a heterotroph is an organism that cannot make its own food, but instead obtains its food by consuming other organisms. That is, a heterotroph is an organism that eats other organisms (plants or animals) for energy and nutrients. For this reason, heterotrophs are considered consumers.

We can conclude that the correct answer is:

The correct answers are:

A. heterotrophs

C. consumers

What we see around three of the antibiotic disks is the area in which the antibiotics stopped the bacteria from growing. It's called a zone of inhibition and it creates an area where the bacteria haven't grown enough to be visible. So, in order to understand which is the most effective antibiotic we must look at its zones of inhibition and find the one with the biggest zone. Therefore, the correct answer is 3, as it is the one with the bigger zone of inhibition.

Tissue is a term that best describes a group of similar cells working together.

What is a tissue?

First, cells on their own can function individually, they are the basic unit/  building block of every living organism, and they have the ability to grow, multiply and die. The cells in a Kangaroo provide structure for the body.

But, when two or more cells come together to perform a similar function, then they become a tissue. Tissue comprises of similar cells that work together to perform a specific task.

From the passage, connective tissue is formed from muscle cells of a kangaroo that organize together to form the structures that let a kangaroo walk, run, and hop, allowing it to avoid predators.

In summary, group of similar cells form tissues so they could perform a specific function.

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Answer:

True............................

The correct option is the first one, Pancreas is to Insulin, as Liver is to Glucagon. The analogy refers to the organ and compound they interact with. Pancreas produces glucagon which interacts with the liver, while liver produces insulin like growth factors, which interacts with the whole body, including the pancreas.

*Oxygen is an essential element in the atmosphere that helps living organisms stay alive.

*Tress gives Earth oxygen through the process of photosynthesis. Plants, such as trees, capture sunlight and use it to split carbon dioxide and water. The product of it is sugar which releases oxygen into the atmosphere as a by-product of the process.

The absence of nucleolus will affect the process of protein synthesis because r-RNA is required for protein formation and the synthesis of r-RNA occurs in the nucleolus.

Nucleolus is a small dense structure present inside the nucleus. It is site for r-RNA synthesis. Ribosome assembly also takes place inside the nucleolus. Nucleolus is also known to play part during cell's response to stress.

r-RNA is the ribosomal RNA. It is involved in the formation of ribosome along with some proteins. Ribosome is the most essential machinery for the synthesis of proteins. r-RNA belongs to the category of non-coding RNAs. r-RNA is considered to be a ribozyme.

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When Charles Darwin discover the various fish species on the island of Guadalupe house he was surprised to find so many different but related species in such a small geographical area.

The idea that best illustrate the correlation between competitive advantage in individuals traits in a particular environment is the principle of normal variation which states that:

Charles Darwin, full name Charles Robert Darwin, was an English scientist whose scientific theory of evolution by natural selection created the cornerstone of contemporary evolutionary research. He was born on February 12, 1809 in Shrewsbury, Shropshire, England and died on April 19, 1882 in Downe, Kent.

Darwin's most extraordinary contribution to science was to finish the Copernican Revolution by defining nature for biology as a system of matter in motion guided by natural laws. The genesis and adaptations of organisms were brought into the realm of science with Darwin's discovery of natural selection.

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wearing sunglasses to protect eyes from UV ray is reasponse to an external stimuli.

the UV rays from the sun are the external stimuli, while the oter option are internal stimuli

Animal cells and plant cells are eukaryotic cells, that is, their genetic material (DNA) is stored within the nucleus.

These two types of cells, even though they are eukaryotes, still have some differences.

Plant cells have vacuole, chloroplast, and cell wall (these structures are absent in animal cells). Mitochondria are an organelle that is present in both animal and plant cells.

The correct statements are A and B:

A) Both plant and animal cells can have mitochondria;

B) In animal cells, chromosomes contain the master plan for cellular activities and cell development;

Statement "C" is incorrect because both animal and plant cells have a nucleus.

Answer:

Genes

Explanation:

Although the parents both have dominant eyes.

The child could have eyes from the grandparents that skipped a generation.

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If both parents carry the recessive allele for blue eyes, a blue-eyed person with two brown-eyed parents is possible.

Each individual receives two copies of each gene, one from the mother and another from their biological father. In this situation, both parents have the pigmented iris dominant allele (BB or Bb), so both seem to have brown eyes. Both parents, however, may be heterozygous for of the recessive allele for the blue eye gene (Bb), which they could pass on to their offspring with a 25% chance.

If both parents carry the recessive gene, their children have a 25% chance of inheriting two copies of the recessive variant (bb) and so having blue eyes. The blue-eyed person in this scenario inherited an allele that is recessive from each parent, culminating in their blue eye colour.

Therefore, while it is less common for a person with two brown-eyed parents to have blue eyes, it is possible if both parents are carriers of the recessive allele.

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Viruses are likely to get mutations due to the fast reproduction cycle, this can lead to different replication mutations. the rate of mutations induced by the DNA polymerase is 1/100,000, it is low, but due to the fast spread of the viruses, it could induce some changes.

But one of the main characteristics of the Delta variant is its ability to evade the immune system, so I would say that the mutations that led to this variable were the environmental factors, because it adapted to be more contagious and also to be able to spread easily.

But to give the right answer it is necessary to look into the specific mutations this variable has in regard to the ones that come before.

When the northern hemisphere is tilted toward the sun (90° North Pole - latitudes between the Equator and North Pole) it is experiencing summer.

The correct answer is the letter C: an insulated body covering, such as fur or feathers

Endotherms mainly use internally generated heat in order to maintain body temperature. This will cause their body temperature tends to stay steady regardless of the environment. On the other hand, ectotherms depend mainly on external heat sources and their body temperature changes with the temperature of the environment.

Examples of endotherms are birds and mammals

Examples of ectotherms are fishes, amphibians, reptiles, and invertebrates.

Answer: Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.

Explanation:

American diet consists of excess sodium, saturated fat, refined grains, and calories from solid fats and added sugars while Inuit diet consists mainly marine foods like shell fish , whales or birds animals mainly duck bear and plants  that include roots and berries .

Inuit diet is not healthier then American diet , this kind of diet mostly consists of non vegetarian food , that can be eaten raw to supply essential nutrients like whale skin , seal brain . this diet is generally taken by the people who live in frozen snow covered area .

On the other hand American diet includes Fried foods,  Processed foods, Processed meats, Refined grains  and Red meat.

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Okay. We can say that it is possible to identify the cycle cell stage the cell are getting through in the shown diagram. It's metaphase since the nuclear envelope denatures itself, and chromosomes start to get visible on the cytoplasm, aligning themselves along the equatorial cell axis.

In science, the meaning of "theory" is different than the one we use commonly.

In the day-to-day, "theory" means a supposition or speculation, while a scientific theory is an explanation of a certain aspect of nature that is supported by evidence collected from several sources, and that has been tested repeatedly following the scientific method. A scientific theory is considered to be a truth, which is the case for natural selection and evolution.

The labeled part is URETHRA

The male urethra has a length of 18-22cm and it conveys urine from the urinary bladder to the exterior opening of perineum. It also provides an exit for the semen.

Photosynthesis is a mechanism of sugar production that is carried out by plant organisms possessing chloroplasts. Most animals cannot perform photosynthesis because they do not have chloroplasts, the great white shark is one of them.

On the other hand, respiration is a mechanism for obtaining energy that is performed by all organisms, which can be aerobic (in the presence of oxygen) or anaerobic (in the absence of oxygen). In cellular respiration, sugars such as glucose are metabolized to obtain energy.

The equation changes depending on the type of breathing that is performed, but in this case, the white shark performs aerobic breathing, so the equation would be:

Answer:

Photosynthesis is a sugar-production mechanism carried out by plant organisms possessing chloroplasts. Most animals cannot perform photosynthesis because they do not have chloroplasts, the great white shark is one of them.

On the other hand, respiration is a mechanism for obtaining energy performed by all organisms, which can be aerobic (in the presence of oxygen) or anaerobic (in the absence of oxygen). In cellular respiration, sugars such as glucose are metabolized to obtain energy.

The equation changes depending on the breathing that is performed, but in this case, the white shark performs aerobic breathing, so the equation would be:

Explanation:

CRISPR is a family sequences derived from viral DNA fragments, which is used by bacteria as a defense mechanism against bacteriophages. Together with the Cas9 enzymes, CRISPR is also a gene-editing tool. Therefore, the correct answer is the last option.

Evolution is any modification or change in the organism's characteristics over many generations. The most recent evolution within Homo sapiens populations is about 50,000 years ago. This refers to evolutionary adaptation, sexual and natural selection, and genetic drift.

Humans are still undergoing evolution. Changes to adapt to environment is a genetic change and therefore considered as evolution. Blue eyes is considered as an evolutionary trait of humans recently. It came from a mutation from an ancestor 6,000-10,000 years ago. This just means that humans will continue to evolve because evolution is considered as a slow process that will take many generations.

The main energy source in humans is glucose, which is a monosaccharide. Through cellular respiration, ATP is produced from glucose. ATP is the energy currency of biochemical reactions in the human body. On the other hand, a polymer of this monosaccharide (beta glucose) is cellulose, which is found in plants as part of their cell wall.

We can conclude that the correct answer is:

C. carbohydrates

As we know an Operon is a genetic unit formed by a complex set of genes (polycistron c)that can self-regulate, itsis composed of 3 main factors: Promoter, operator, and regulatory gene. Therefore we can asaythat tthe correct answer is option C.

As we know a gene is the minimal functional part of DNA and code for different traits, these can be proteins, RNA, or other type of regulators, so we can say that the correct option is the number 2