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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.

General category: Biology.

Sub-category: Ecology

Topic: Natural resources

Introduction:

The term sustainability describes how biological systems remain diverse and productive over time.

Sustainability refers to how biological systems remain productive over time. In particular, the term sustainability is described as the balance of a species with its resources in its specific environment. On the other hand, sustainable development is exercising the correct use of current resources without compromising those of future generations. Therefore, sustainable processes preserve, protect and conserve current and future natural resources.

We can conclude that the correct answer is:

Sustainability refers to how biological systems remain productive over time. In particular, the term sustainability is described as the balance of a species with its resources in its specific environment.

All of the following are located in the cytoplasm except (b) nucleolus. The nucleolus is located inside the nucleus. It is concentrated with chromosomes giving its dark appearance.

Biomes are large areas characterized by its soil, climate, vegetacion, and wildlife. There are five major types of biomes: grassland, florest, tundra, desert, and aquatic, they still can be divided into more specific categories, such as marine (aquatic), rainflorest (florest), savanna (grassland/desert), and others. The diversity of these biomes can be based in the animails and plants of the biome, diverse biomes have a wide variety of species and are considered more livable with less environment pressure and challenges that make the area more conducive to higher diversity. The Topical florests are widely considered to have the greatest species diversity of the terrestrial biomes, with nice climate and food for the wildlife. The non-diverse biomes have extreme conditions that make them have lower diversity, for example, tundra and deserts have low diversity because of the climate and the condictions of soil and water.

Based on the table, the process performed by organisms that produce oxygen for the aquatic ecosystem is autotrophic nutrition, which is photosynthesis (Option D).

The process of photosynthesis refers to a type of energy and mass production observed in autotrophic organisms such as algae in aquatic ecosystems which is known to generate oxygen as a product of these reactions.

Therefore, with this data, we can see that the process of photosynthesis is able to generate oxygen during these types of chemical reactions in autotrophic organisms.

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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.

Answer:

-In a container

Explanation:

The mass of a liquid can be measured by knowing the density and volume. The volume can be known if I put the liquid in a container whose volume is known or in a graduated container.

Explanation:

Carbon is the element which has all living things.It has ability to form complex molecules.Carbon is made inside the ends of fusion cycle.

Answer

C. Oaktree

Explanation

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

A niche of a species encompasses the physicial and environmental conditions that the species requires and, also, the interactions it has with other species. Therefore, the correct answer is A. the role an organism plays within an ecosystem

Suspension B will have cells that appear shrinked

Answer: A

Explanation:

Powerful tail used for swimming. Eyes and nostrils on the top of their head so they can remain submerged while breathing and keeping an eye out. A “third eyelid” called the nictitating membrane sweeps sideways across the eye to protect the eye during feeding and diving

Answer:

c) Mutualism

Explanation:

Mutualism is the type of relationship which exists in microbiomes between bacteria and humans. Hence, option (c) is correct.

Mutualism is a type of relationship exists in microbiomes between bacteria and humans.

Option C is correct.

The human intestine and many of its symbionts have a mutually beneficial relationship in which the intestine supplies nutrients to the resident bacteria while the bacteria help with food digestion and nutrient absorption, produce vitamins like biotin and vitamin K, and control immune system activity.

Individual variations in the microbiome influence host health, may be implicated in disease genesis, and affect drug metabolism, toxicity, and efficacy. Humans have established intimate symbiotic connections with a consortium of gut bacteria (microbiome).

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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:

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.

Here we have a barracuda a predator fish and parrotfish as prey, now if we analyze each available option we can see that option A is not correct as there is no benefit for the parrotfish, option B is not correct either as predation is an instinctive behavior. Now with option C, we must be careful as in the first place predation leads to competition, however, in this case, there is no mention of other predator fish be another barracuda, or other species meanwhile option D, foraging behavior implies the consumption of food, seeking, selection and manipulation of it so in this particular case, stalking a school of fish falls under this category, therefore option D is the correct answer.

Answer: Myelogram

Explanation:

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.

A. below 7

On a pH scale, 7.0 is considered neutral, while values higher than 7.0 are basic, and values less than 7.0 are acidic.

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.

Answer:

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

Explanation:

NAD+ is regenerated when the electrons from NADH are given into the mithocondrial membrane, in the electron transport chain. These electrons are used to sustain the proton gradient, that allows the production of ATP.

An organ system is a group of organs that work together to do a certain function in the organisms body. This can be seen in the alternative B, that represents the nervous system (the brain, spiral cord, and nerves working together for one purpose).

Zari should place the chicken on the counter .

Zari should place the chicken on the counter because mom needs the chickens for dinner in night . Thawing means to go from frozen to liquid or soft usable form .

Thawing is needed for making the freeze materials into usable form that requires melting of ice and becoming soft .  People use to preserve chickens in the refrigerator for long and safe use . But , before cooking the chicken it is needed to be thawed so to melt the ice and in order that is should be cooked properly .

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The independent variable is the concentration of Miracle-Gro.

The dependent variable is the height of each plant group.

The control group in the experiment is group A.

The constant variables in the different groups are the amount of sunlight received, the growth period, seed variety, and humidity.

What is the plant growth experiment?

A factorial experiment includes the study of plant growth. Several factors (seed, water) that are set at various amounts and a response variable make up a factorial experiment (plant height). Numerous elements, including seed type, water content, soil type, amount of light, temperature, humidity, and others, have an impact on plant growth.

The variable that differs between groups is known as the independent variable.

The one being measured is the dependent variable.

The Control group is the one that does not receive the new treatment being looked on.  

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The lactase is an enzyme in the small intestine that breaks lactose into simpler sugar forms (galactose and glucose) that can be absorbed to generate energy. That sugar is important for gene regulation because it is linked to the Lac operon, the repressor for this structure prevents the DNA transcription, if the repressor is not in place the operon works and the enzyme is produced, being the lac repressor innately active in the absent of lactose.

The smallest unit of study in the area of biology is molecules, because they are the units from which all the structures and components of the cell (the fundamental unit of life) are formed.

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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