I need help with question 5 this is non graded

Spermatogenesis

In spermatogenesis, since the cell division process of the germ line called meiosis is involved, 4 cells are generated, all genetically different from each other.

Therefore, the correct answer to this question is option a.

1) Fossils are the preserved remains of traces of organisms from the past so they are very important evidence for evolution. They show extinct organisms that were very different from any now living, it also shows successions of organisms through time. Fossils tell us when organisms lived, they provide evidence for the progression and evolution of life on the earth over millions of years.

Answer:

Electric vehicles (EVs) offer an opportunity to replace fossil fuels in the transport sector. Electrification of the transport sector can also bring benefits in terms of increased energy efficiency and reduced local pollution. However, there are genuine concerns about meeting the future energy demand for charging EV batteries with clean and renewable sources. More importantly, the issue of long-term sustainability of EVs is underscored by the supply risks of critical material resources used in the EV batteries. Extraction of some of these material resources are linked to significant environmental impacts as well as social and ethical issues.

Explanation:

The process that can only be carried out byplants in the presence of light-dependent reactions. These reactions convert light energy to chemical energy and is present in the process of photosynthesis. The energy from the sun together with water is being broken down to give rise to ATP and NADPH which are used in light-independent reaction or dark reactions.

Cellular respiration does not use light since it is not dependent on light. Dark reactions are light-independent processes. Homeostasis is the maintenance of the internal environmentr of an organism in order to survive.

Answer - B light-dependent reactions

Answer: B. light-dependent reactions

The incorrect statement about nucleic acids is that DNA has ribose sugar, RNA has deoxyribose sugar

If the parents reproduce and create an offspring, the offspring will definitely have red hair and most likely have brown eyes.

This is because both parents have red hair so they must be homozygous for that character, and as the mother has brown eyes, which is dominant, it is more probable that the phenotype will be expressed by their offspring.

Both endocrine and exocrine systems are sililar because they function is to produce and secrete substances that are important for different processes of the body, being the alternative with the best answer the letter B (they both produce and secrete products).

Suspension B will have cells that appear shrinked

STEPS IN THE FORMATION OF SEDIMENTARY ROCK

Sedimentation starts when rocks get weathered by rains and winds. The eroded sediments will be washed o scarried in the water. Over time, more sediments will pile up in the water and compresses the lower layers. Strata of layers will happen as time passes by. The salt and dissolved ions in the water act as glue to make it into a rock mass. The rock mass formed is now what we call a sedimentary rock. n

Answer

C. Oaktree

Explanation

Animals like the tiger must make their own food and these are termed heterotrophs.

Answer: The objective and ocular lenses are responsible for magnifying the image of the specimen being viewed. So for 10X objective and 10X ocular, Total magnification = 10 X 10 = 100X (this means that the image being viewed will appear to be 100 times its actual size).

Explanation: hope its correct stay safe.

Answer: The Ninth Amendment became a part of the Bill of Rights that was brought to the Constitution on December 15, 1791. It says that all of the rights now no longer indexed withinside the Constitution belong to humans, now no longer the government. In different words, the rights of humans aren't restrained to simply the rights indexed withinside the Constitution.

Answer:

existing of the writing consistution should be treated

Explanation:

The concepts that were well accepted by the scientific community In the 1950s, when Watson and Crick were working on their model of DNA were chromosomes are made up of protein and nucleic acid, chromosomes are found in the nucleus, and genes are located on chromosomes (Options a, b and d).

Watson and Crick are two molecular biologists who in 1950 discovered the double helix structure of the DNA molecule, which required the use of previous evidence such as the presence of chromosomes in the nucleus and X-ray diffraction.

Therefore, with this data, we can see that Watson and Crick discover the double helix DNA structure.

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In the 1950s, when Watson and Crick were working on their model of DNA, the following concepts were  well accepted by the scientific community:

a.  Chromosomes are made up of protein and nucleic acid

b. Chromosomes are found in the nucleus

d. Genes are located on chromosomes

So, options A, B and d were correct.

A chromosome is described as a long DNA molecule with part or all of the genetic material of an organism.

By the year 1940 it was known by scientists that chromosomes are made up of protein and nucleic acids and chromosome carries the genetic material but at that time it was thought that protein part of the chromosome is the genetic material.

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Matter cycle through the environment as energy flows in a single direction.

Bacteria are common, mostly free-living organisms having an unusual single biological cell. They account for a large chunk of the prokaryotic microbiological kingdom. Bacteria, which are typically a few micrometers long and were some of the first living organisms to appear on Earth, are found in the majority of its habitats. Bacteria are little, single-celled organisms that draw nutrition from their surroundings. In some circumstances, your child or another living thing is that environment. Some bacteria are beneficial to human bodies because they maintain the digestive system functioning properly and prevent the entry of dangerous germs.

The DNA in bacteria, which are prokaryotes without a nuclear envelope, is found suspended inside the cytoplasm. Bacteria are categorized according to their morphology and how they respond to the Gram stain in a laboratory setting. Gram-positive or Gram-negative bacteria can both exist. Gram-negative bacteria have a thin peptidoglycan coating and outer lipid layer, which prevents them from reacting to the Gram stain. Because they lack the outer lipid layer and have a stronger peptidoglycan layer, gram-positive bacteria do stain.

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Answer:

(D) it is a series of rapid changes in an ecosystem

Explanation:

The correct option is B. Law of segregation.

The back portion of the brain that controls vision is called the occipital lobe.

What is the occipital lobe?

One of the four main lobes of the cerebral cortex of the mammalian brain is the occipital lobe. The name is a result of where it is located on the back of the head. The majority of the physical region of the visual cortex is located in the occipital lobe, which is the mammalian brain's visual processing hub. Of the four paired lobes in the human brain, the two occipital lobes are the tiniest. The posterior cerebrum includes the occipital lobes, which are situated in the back of the skull. The lobes of the brain are named from the overlying bone and the occipital bone overlies the occipital lobes.

Hence, the answer is the occipital lobe.

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Ecology: Ecological succession, ecosystem

The stability of an ecosystem refers to the ability of an ecosystem to return to equilibrium after a perturbation such as a wildfire, for example, the ecosystem was a forest before the wildfire, and then it can return to being a forest after the fire.

If a severe wildfire wipes out all plant and animal life, then the biotic elements of that ecosystem are destroyed, and a secondary succession begins to take place. This not necessarily means that the same species would colonize.

We are between two options that correctly identify the plants and animals as biotic factors:

B. Plants and animals were destroyed by the wildfire, and even if the abiotic factors remain the same, the ecosystem can never return to stability.

D. Plants and animals were destroyed by the wildfire, but if abiotic factors remain the same, the ecosystem can return to stability.

The first colonizers in a secondary succesion are plants such as grass and herbaceous plants, and the kind of plants that can grow in a place depends on the soil characteristics, sunlight, and water supply, i. e. abiotic factors. So, if the abiotic factors remain the same, the ecosystem should be able to return to stability.

This means the right answer would be D. Plants and animals were destroyed by the wildfire, but if abiotic factors remain the same, the ecosystem can return to stability.

B: The sequence of the DNA determines and individual's traits

A cannot be the answer because while there is a part of a DNA sequence that determines the sex of an individual, there is far more to it. C is not the answer because there isn't necessarily a code for mutations, it's something that happens. D is not the answer because someone's genes are set.

Question Two:

C: Meiosis

Fertilization is the process that occurs when a sperm cell meets an egg cell. Mitosis is how regular cells reproduce. Replication is when DNA reproduces. Therefore, the answer is Meiosis.

Ead-25 genotype that were observed in one or more daughter cells was also present in the parental cell.

EAD- 6 genotype were ONLY in the daughter cell.

An organism's genotype is its specific combination of alleles for a given gene. So, for example, in the pea plants above, the possible genotypes for the flower-color gene were red-red, red-white, and white-white. The phenotype is the physical manifestation of an organism's allelic combination.

Moreover, genotype, the genetic constitution of an organism. The genotype determines the hereditary potentials and limitations of an individual from embryonic formation through adulthood. Among organisms that reproduce sexually, an individual's genotype comprises the entire complex of genes inherited from both parents.

Hence, alleles of the same gene are either autosomal dominant or recessive. An autosomal dominant allele will always be preferentially expressed over a recessive allele. The subsequent combination of alleles that an individual possesses for a specific gene is their genotype.

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The refractory period is the time in which the cell membrane remains depolarized, that is, it does not react to a second stimulus. It takes place after an excitation of the cell.

This is an example of incomplete dominant trait, in which any of the alleles complete expresses over the other, giving a resulting phenotype for the heterozygous genotype that is intermediate between the homozygous genotype.

The correct option is b. incomplete dominant.

An independent variable is that which one can change at will, considering the different purposes of a particular research or experiment. In this case, then, the independent variable would be the colors of the light, and the dependent variables would be those related to plant growth, and moisture, since are factors that are regulated by the intensity or the color of the light (we have to know that different colors of light will have different wavelengths, in hence, different temperatures).

The correct answer is the letter D. XYLEM

Xylem is a main component of vascular tissue in plants that is responsible for transporting water and nutrients from roots to plants' leaves.

By definition, features that are shared due to a common ancestor are homologous structures.

Now, notice that all mammals share the homologous structure of the vertebrae in common.

Thus, we can conclude that the correct answer is:

B. Mammals have homologous structures.

Blue-green algae is an  important organisms that play different roles in the nitrogen cycle.

Blue-green algae converts nitrogen into organic nitrogen compounds as well as Nitrobacters and other Nitrogen-fixing microbes. They are essential to healthy water bodies as they are responsible for producing oxygen and are a source of food to certain aquatic animals.

Nitrates and ammonia produced in the nitrogen cycle are as a result of nitrogen fixation made by algae and plants that animals eats and incoporate into their body compounds. They are able to convert dinitrogen however unavailable into bioavailable ammonia.

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The most abundant naturally occurring gas in the atmosphere is the Nitrogen (N2); however, plants and animals are unable to use this directly because of their inability to break down its triple bond. In order for them to utilize this gas, it must be transformed into another form or molecules. There are ways where to convert nitrogen to make it useful for the plants and animals.

The first one is lightning. At the time when lightning strikes, nitrogen gas is transformed into nitrates by which plants can use.

The second one is through the process of nitrogen fixation. In this process, special nitrogen-fixing bacteria helps in converting this gas into useful forms.

Lastly, when there is a decaying organism. Nitrogen is released in the form of ammonium.

As we can see, throughout the experiment, most of the variables, such as sunlight, size or temperature remained constant with NaHCO3 concentration being the only variable that changed.

NaHCO3 provides CO2 in the aquatic environment and therefore stimulates photosynthesis by increasing the average oxygen obtained in the 5 tests.

However, photosynthesis is no longer stimulated after reaching a concentration of 80 g/L NaHCO3.

Therefore, we can expect that at higher concentrations (120, 140, etc.) there is no significant change and therefore, the optimum NaHCO3 concentration would be 80 g/L NaHCO3.

External respiration refers to inhalation and exhalation; while internal respiration is the exchange of oxygen and carbon dioxide between the cells and blood cells.

This means C, exchange of dissolved gases between blood in tissue capillaries and the body tissues, is the right answer.

The result of the following cross indicates that orange eyes would be recessive to black eyes.

According to Mendel, a cross between two people who are heterozygous for a dominant trait would result in offspring with a 3:1 phenotypic ratio, with the dominant trait making up around 75% of the phenotype and the recessive trait making up the remaining 25%.

The black eye color phenotype in this instance is 247, whereas the orange eye color phenotype is 86.

Calculating each trait's proportion

247/333 ×100%, or 74.1%, are black eyes.

Orange eye: (86/333 x 100%) = 25.8%

74.1:25.8 is approximately 3:1

It follows that black eyes are dominant and orange eyes are recessive.

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The given question is incomplete. The complete question is:

The result of the following cross indicates the orange eyes are _____ black eyes. A cross between two aliens with black eyes. Their offspring have two phenotypes. 247 of them have black eyes, and 86 of them are orange-eyed. The total number of offspring is 333.