please help me, please.

The population density of the 900 sheep in the given plot of land is 150 sheep per square kilometer.

The population density of 900 sheep in a plot of land that is 3.00 km by 2.00 km can be calculated by dividing the total number of sheep by the area of the land.

First, we need to calculate the area of the land. The area can be found by multiplying the length and width of the plot of land:

Area = length × width = 3.00 km × 2.00 km = 6.00 km²

Next, we divide the total number of sheep by the area to calculate the population density:

Population Density = Total number of sheep / Area = 900 sheep / 6.00 km²

Performing the calculation, we find:

Population Density = 150 sheep/km²

Therefore, the population density of the 900 sheep in the given plot of land is 150 sheep per square kilometer.

Population density is a measure of the number of individuals (in this case, sheep) per unit area. By dividing the total number of sheep by the area of the land, we obtain the population density in terms of sheep per square kilometer. In this case, the population density is 150 sheep/km², indicating that there are, on average, 150 sheep within each square kilometer of the land.

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Answer:

Oak bark is the correct answer.

Oak bark was the first cell viewed by the light microscope.

By presenting a magnified image of how minute structures and samples interact with visible light, such as their absorption, reflection, and scattering, light microscopy is used to make them visible.

This helps us grasp the sample's appearance and composition while also allowing us to observe tiny processes like how chemicals diffuse through a cell membrane.

An early microscope's illumination method consisted of sunlight that was captured and reflected by a mirror onto the sample.

Therefore, Oak bark was the first cell viewed by the light microscope.

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Answer:

solar panels

Explanation:

Life on Earth is not evenly distributed. In certain biogeographic regions, defined as biodiversity hotspots, there are ecosystems that represent and support more types of life than others.

In certain biogeographic regions, defined as biodiversity hotspots, there are ecosystems that represent and support more types of life than others.

Biodiversity hotspots are areas that exhibit exceptionally high levels of species richness and endemism, meaning they harbor a large number of species found nowhere else in the world.

These regions are characterized by diverse habitats, such as rainforests, coral reefs, or grasslands, which provide a wide range of ecological niches for different organisms to thrive.

Biodiversity hotspots are crucial for the overall health of the planet.

They play a significant role in maintaining ecosystem functions and services, such as pollination, nutrient cycling, and climate regulation.

They also hold immense scientific value as a source of potential discoveries of new species and their associated genetic resources.

However, biodiversity hotspots are also highly vulnerable to threats like habitat loss, climate change, pollution, and invasive species, putting their unique biodiversity at risk.

Conservation efforts in these regions are of utmost importance to protect the extraordinary variety of life they harbor and ensure the long-term sustainability of our planet's ecosystems.

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Answer:

The correct choices will be "X-Linked Recessive".

Explanation:

Answer:

Explanation:

Germ cells are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through mitosis, they originate more sexual cells, but through meiosis, they produce gametes -sperm and egg cells-. This process is known as gametogenesis.

Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.

Spermatogenesis is the process of production and maturation of sperm cells. Spermatogonia are the masculine diploid germ cells, carrying 46 chromosomes. These germ cells suffer mitosis to reproduce. Some of them stay as spermatogonia, and some others become primary spermatocytes, which are in charge of gamete production. Primary spermatocytes are also diploid cells, meaning that they still carry 46 chromosomes.

Each primary spermatocyte replicates its genetic material and then goes through meiosis I to produce two daughter haploid cells called secondary spermatocytes, each of them carrying 23 chromosomes. Each secondary spermatocyte will produce two other haploid daughter cells by meiosis II.

The total result from the two cellular divisions of each primary spermatocyte is four haploid daughter cells called spermatids.

During spermiogenesis, spermatids mature into spermatozoa or sperm cells. Each sperm cell characterizes by being composed of a head, midpiece, and tail.

Answer

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Answer:

Survival of the fittest

Explanation:

According to the Darwin’s theory of survival, a species can survive among its peers only when it is fit enough to adapt to the natural changes and hence remain alive till its reproductive stage in order to produce fertile offspring.  

Such species which survive are known as fit species while the remaining unable to cope with changing environment die out at an early stage of life.  

Answer:

C. Prey

Explanation:

Organisms like plants produce their own nutrients via photosynthesis, so they do not rely on prey. Hope this helps! Have a great day! :)

D. The cytoskeleton plays a role in directed cell movements , governs internal organization and cell division  of the following statements is not true

In addition to its structural function, the cytoskeleton is in charge of cell mobility. Internal transport of organelles and other structures (such as mitotic chromosomes) through the cytoplasm is one of them.

Microtubules are longer filaments that are constantly assembling and disassembling; they play an important role in moving daughter chromosomes to newly formed daughter cells during mitosis, and bundles of microtubules form the cilia and flagella found in protozoans and some multicellular animal cells.

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If someone does not have freckles, it suggests that their genotype lacks the genetic variants associated with freckle formation. Freckles are a result of the interaction between genetic factors and exposure to sunlight.

The presence or absence of freckles is determined by variations in genes related to pigmentation, specifically the MC1R gene.

The MC1R gene plays a role in regulating the production and distribution of melanin, the pigment responsible for determining skin, hair, and eye color.

Certain variants of the MC1R gene are associated with increased melanin production, leading to the formation of freckles in response to sun exposure.

If an individual does not have freckles, it suggests that they do not carry the specific genetic variants associated with freckle formation. This can be inferred from the absence of freckles in their phenotype.

However, it is important to note that the absence of freckles does not necessarily mean the complete absence of genetic variants related to pigmentation.

There could be other genetic factors influencing their skin pigmentation and melanin production, which may result in different phenotypic traits.

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Answer:

when one oxygen ia removed from Dna it changes into rna

CCS is not viable, despite the fact that it can reduce emissions at the source and that point sources make it easier to remove CO2.

They can be divided into three groups: oxy-fuel combustion systems, post-combustion carbon capture (the main technique utilized in current power plants), and pre-combustion carbon capture.

The benefits of adsorption-based post-combustion CO2 capture technology are cheaper CO2 separation costs, decreased regeneration energy needs, and minimized pressure losses, which guarantee a relatively good performance in the capturing process.

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Answer:

b. longitudinal wave

Explanation:

noun Physics.

a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.

Answer:

Longitudinal

Explanation:

because the distance between molecules are compressing and expanding

The consequences of exponential population growth of any population is that the supplies could someday run out, birth rates might increase or decrease, and it might reach its carrying capacity.

Exponential Population Growth- Exponential growth happens if a population's per capita growth rate is constant, regardless of population size, leading the population to increase dramatically as the population rises.

Birth Rate- The proportion of live births to 1,000 people in the general population in a given year.

Carrying Capacity- The maximum number of humans that a particular kind of animal or plant can sustainably support. The smallest number of a specific species that the environment can tolerate. The usual number of individuals of a certain species that the habitat can support.

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1. The exocrine function is stimulated by this hormone produced in the anterior pituitary: follicle-stimulating hormone (FSH), and produces ova (eggs) in the female.

2. The endocrine function is stimulated by this hormone in the anterior pituitary: luteinizing hormone (LH), and produces estrogen and progesterone in the female.

3. The exocrine function is stimulated by this hormone produced in the anterior pituitary: luteinizing hormone (LH), and produces sperm in the male.

4. The endocrine function is stimulated by this hormone in the anterior pituitary: follicle-stimulating hormone (FSH), and produces testosterone in the male.

1. The exocrine function of the reproductive system in females is stimulated by the hormone produced in the anterior pituitary called follicle-stimulating hormone (FSH), which promotes the production of ovarian follicles. The exocrine product in females refers to the release of eggs or oocytes from the ovaries during ovulation.

2. The endocrine function of the reproductive system in females is stimulated by the hormone luteinizing hormone (LH) produced in the anterior pituitary. LH triggers the release of estrogen and progesterone from the ovaries, which regulate the menstrual cycle, promote the development of the uterine lining, and prepare the body for pregnancy.

3. The exocrine function of the reproductive system in males is stimulated by the hormone produced in the anterior pituitary called luteinizing hormone (LH), which stimulates the production of testosterone in the testes. Testosterone is the primary male sex hormone and is responsible for the development of male reproductive organs and secondary sexual characteristics.

4. The endocrine function of the reproductive system in males is stimulated by the hormone follicle-stimulating hormone (FSH) produced in the anterior pituitary. FSH promotes the production of sperm cells (spermatogenesis) in the testes.

Overall, the reproductive system has both endocrine and exocrine functions, with the anterior pituitary gland playing a crucial role in regulating these functions through the production of specific hormones.

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The number of Atlantic puffins that have adapted to species A will decrease as competition for species A increases. After several generations, the puffins that eat species B and C will be formed.

Adaptation is the process of changing in response to a changing environment. An example is seen in puffins. The puffin that eats species A has a different beak. When another predator enters who preys upon species A, then competition will increase. As a result, species A's consumption of puffin will decrease.

Those puffins that eat species B and C will survive. They will reproduce and produce more offspring. The number of puffins with beaks in Species B and C will increase over time.

Hence, after many generations, puffins of species B and C will increase.

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Answer: The Himalayas

Explanation: The Himalayas are the world's tallest mountains. They are forming as two continents collide. The Appalachian Mountains are the remnants of a larger mountain range.

It is suggested that the doctor use a combination of both treatments which is  inserting a stent and prescribing a statin medication.

Statin medications also known as HMG-CoA reductase inhibitors, are  described as a class of lipid-lowering medications that reduce illness and mortality in those who are at high risk of cardiovascular disease.

In most cases treatment for high cholesterol and coronary artery disease usually  involves a combination of  medications and  medical procedures.

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The step which is a part of the engineering design process but is not part of a scientific investigation is to imagine

Scientific investigation simply refers to those steps and procedures used to in unraveling the science behind a particular naturally observed phenomena.

So therefore, the step which is a part of the engineering design process but is not part of a scientific investigation is to imagine

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The modifications and mechanisms associated with the following feeding habits are the mosquito larva feeds by using its strainers to catch particles and plankton.

Filter feeding in mosquito larva: Using its strainers, the mosquito larva eats by capturing plankton and other particles. Mandible, maxillae, and brushes are present on the head. The pair of brushes at the sides of the mouth can sweep through water and entangle small food particles that are combed into the mouth by the maxillae and mandibles because the ventral surface of the head is angled upward.

Parasitic feeding in tapeworm: The tape worm's head (scolex), which has hooks, and a rostellum, is used for parasitic feeding. The organism is able to cling to the walls of its host's gut thanks to its hooks. The host's digested meal is absorbed throughout the entire body.

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Special senses are senses that have a specialized organ associated with them. we could have more senses, with some specialized organs, like the snake, which has chemical sensors in the tongue.

It's your main sensor. The odor molecules are captured by the tongue, sent to the inside of the mouth, where they are captured by two sensors located at the right and left ends of the palate, and the information is passed on to the brain. Through this information that is sent to the brain, the animal can distinguish whether its prey is moving to the right or to the left. Using this method, a snake can more effectively find and capture its prey.

With this information, we can conclude that we could have more senses, with some specialized organs, like the snake, which has chemical sensors in the tongue.

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Cerebral ischemia or brain ischemia, is a condition that occurs when there isn't enough blood flow to the brain to meet metabolic demand. This leads to limited oxygen supply or cerebral hypoxia and leads to the death of brain tissue, cerebral infarction, or ischemic stroke.

Answer:

since the symbol has a "+1" sign at the top right corner it represents a positively charged ion.

it has 4 electrons as it has "+1" symbol meaning it lost one electron out of initially 5 electrons present.

Answer: ion has a 2+ charge then it must have lost electrons to form the cation. If the ion has 18 electrons and the atom lost 2 to form the ion, then the neutral atom contained 20 electrons. Since it was neutral, it must also have had 20 protons. Therefore the element is calcium.

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The acceleration of the car is 2 m/s².

The average velocity of the car is 2 m/s.

The equation acceleration = (final velocity - beginning velocity) / time can be used.

Given:

Initial velocity (u) = 0 m/s (since the car starts from rest)

Final velocity (v) = 20 m/s

Time (t) = 10 s

Using the formula, we can substitute the values:

acceleration = (20 m/s - 0 m/s) / 10 s

acceleration = 20 m/s / 10 s

acceleration = 2 m/s²

Therefore, the acceleration of the car is 2 m/s².

You can use the following equation to determine the average velocity: average velocity = total displacement / total time.

The initial position and the final position are identical since the automobile begins at rest. As a result, the displacement and the ultimate position are equal.

Given:

Displacement = 20 m

Time (t) = 10 s

Using the formula, we can substitute the values:

average velocity = 20 m / 10 s

average velocity = 2 m/s

Therefore, the average velocity of the car is 2 m/s.

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1. If a slide is viewed through a low power objective of 10x and ocular of 4x, the total magnification can be calculated thus:

Total magnification = objective magnification x ocular magnification

                                  = 10 x 4

                                       = 40

2. In order to study the detailed structure of a cell, a high-power objective comes highly recommended. This is because the high-power objective will magnify the essential details of the cell and enables the detailed structure of the cell to be seen.

3. In order to count red blood cells in a blood sample, an objective with a large field of vision comes highly recommended. The higher the magnifying power of an objective, the lower the field of vision. Thus, a low power objective would be the best for counting the red blood cells in a sample.

4. The stage at which chromosomes line up in the center of the cell during mitosis is the metaphase. Mitosis consists of 4 essential stages which are:

5. with reference to the explanation above, the stage of mitosis at which one would see sister chromatids moving towards the pole would be the anaphase.

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