Which type of selection occurs when a population experience a shift in diversity toward the large organisms

Answer:

Early Cells Lab

Step by step

1. How much did the egg change in size? (answer should be in centimeter)

2. Was your hypothesis correct? Why or why not

Safety Notes

1.Wash your hands carefully after each time you touch the egg.

2.Be sure that you have permission and supervision from a guardian before completing this lab activity.

3.The egg and vinegar are safe for kitchen drains, but check with a guardian for the preferred method of disposal in your kitchen.

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Explanation:

Answer: It is present at high concentration at the anterior end and low concentration at the posterior end

Explanation:Gene expression in developing organisms is regulated on several different levels.

Answer: C is the answer

Explanation:

As per the growing plant roots of the cells of the tip the roots are at a constant motion and also for the division of the growth to take place.  

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Answer:

C) A red blood cell and hair follicle cell have the same genes, but they are expressed differently

Explanation:

All cells of a living organism contain the same genetic sequence i.e. they contain the same set of genes, however, differences in the expression of these genes may occur. This is responsible for the different specific roles or functions played by organs of the body system.

The expression of a gene refers to the process by which a gene is transcribed and translated into a protein molecule, which is responsible for traits in the body. Genes are expressed differently in order for certain cells to function differently and specifically. For example, difference in expression of genes is responsible for the ability of red blood cells to produce hemoglobin and the inability of hair follicle cells to, even if they contain same genes.

The most common method of carbon dioxide transport is as bicarbonate ions in the plasma, the correct option is (d).

When carbon dioxide (CO2) enters the bloodstream, it reacts with water (H2O) to form carbonic acid (H2CO3). Red blood cells contain the enzyme carbonic anhydrase, which is responsible for catalyzing this process.

Carbonic acid then dissociates into a hydrogen ion (H+) and a bicarbonate ion (HCO3-). The bicarbonate ion then diffuses out of the red blood cells and into the plasma, where it is transported to the lungs. In the lungs, the process is reversed, and carbon dioxide transport is released from the bicarbonate ion and exhaled, the correct option is (d).

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A. atmosphere

explanation: there is water vapor in the atmosphere that is considered to be part of the hydrosphere.

In an ecosystem, atmosphere is a sphere in  the Earth system  which is also part of the hydrosphere.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

Because they are replenished when depleted and can also be recycled.

Explanation:

This is because Renewable resources are resources that can be used again and again, it can be replenished and replaced when depleted. Examples are solar power, water, wind e.t.c.

Most Renewable resources occur naturally and metals ore occur naturally where metals are gotten. Metals can be considered renewable because they can be recycled.

Answer:

The answer is 2

Explanation:

Based on his experiments on pea plants, Gregor Mendel concluded that an offspring receives two factors / genes for a single characteristic. These factors exist in pairs, with one factor inherited from each parent. So, here option A is correct.

Mendel's experiments involved cross-breeding different varieties of pea plants and carefully tracking the inheritance patterns of specific traits, such as flower color, seed texture, and plant height. Through his observations, he formulated the fundamental principles of inheritance, which laid the foundation for modern genetics. Mendel's conclusion was based on his observation of the consistent segregation of traits in the offspring. He found that when two pea plants with different forms of a trait (such as tall and short plants) were crossed, the first generation of offspring (F1 generation) all displayed the dominant form of the trait (in this case, all tall plants).

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complete question is below

Based on his experiments on pea plants, how many factors did Mendel conclude an offspring receives for a single characteristic?

A,offspring receives two factors

B,offspring receives ten factors

The portion of the central nervous system that originates in the brain and extends down the lower trunk is the: A) spinal cord

The spinal cord is a crucial part of the central nervous system, connecting the brain to the rest of the body and allowing for communication between them. It is the part of the central nervous system that carries nerve signals between the brain and the rest of the body and is responsible for controlling movement, sensation, and reflexes. The spinal cord is divided into four sections, each with its own nerve roots. The cervical nerves run from the neck to the shoulders, the thoracic nerves run from the chest to the abdomen, the lumbar nerves run from the lower back to the pelvis, and the sacral nerves run from the pelvis to the feet.

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Answer:

In the core of a red giant star a very very long time ago.

Answer:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Explanation:

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Answer:

Abiotic factors (non-living things) in a tropical rainforest include temperature, humidity, soil composition, air, and many others. A few of the many biotic factors (living things) in that forest are toucans, frogs, snakes, and anteaters.      

Tundra is characterized by very cold temperatures and low rainfall, creating a very cold desert. The permanently frozen ground is called permafrost. Abiotic factors are the non-living parts of an ecosystem, and these include temperature, precipitation, wind, sunlight, and weather.

Biotic Factors: Low Shrubs (sedges, reindeer mosses, liverworts, and grasses), Crustose and Foliose Lichen, Herbivores (lemmings, voles, caribou), Carnivores (arctic foxes, wolves, polar bears), Migratory Birds (ravens, snow buntings, falcons, loons), Insects (mosquitoes, flies, moths, grasshoppers), Fish

Abiotic factors or components of the grassland ecosystem Abiotic components of this ecosystem are soil, temperature, rainfall, and topography. All these abiotic factors greatly affect the grassland ecosystem.

Biotic: grass, trees, antelope, prairie dogs, etc. These are all living organisms, therefore they are biotic members.

Abiotic: rocks, dirt, rivers, etc. These are all non-living things, so they are abiotic members of the ecosytem.

this is for the temperate dicedous forest

Some of the biotic factors of the biome are but not limited to: Lichen, moss, ferns, wild flowers, shrubs, maple trees, oak trees, birch trees, spruce trees, pine trees, spiders slugs, frogs, turtles, salamanders, beetles and much more.Abiotic factors in an environment include such items as sunlight, temperature, wind patterns, and precipitation.

Explanation:

Answer:

1. merkel cells

2. tactile corpuscle

3. lamellated (lamellar) corpuscle

4. nociceptors

Explanation:

Merkel cells are epithelial cells found around hair follicles which are capable of sensing gentle touch sensations such as, for example, tactile discrimination and environmental exploration. Tactile corpuscles are a class of nerve ending required for mediating sensitivity to light touch sensations. The lamellar corpuscles are another class of nerve ending capable of sensing deep touch sensations and vibrations. Finally, nociceptors are somatic sensory receptors capable of sensing noxious (damaging) stimuli.

1. Light-touch receptor located at the epidermal-dermal border: Tactile corpuscles (D)

Light-touch sensors called tactile corpuscles, sometimes referred to as Meissner's corpuscles, are situated near the epidermal-dermal boundary. They are located in the papillary layer of the dermis's dermal papillae, which are tiny, finger-like projections.

Particularly dense populations of tactile corpuscles can be seen in skin regions like the lips, palms, and fingertips that are sensitive to gentle touch.

2. Light-pressure receptor located in the papillary layer of the dermis: Merkel cells (A)

3. Deep pressure receptors: Lamellated corpuscle (C)

4. Receptors that respond primarily to pain and temperature: Nociceptors (B)

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Enzymes are the biological catalysts. They are made up of proteins that have the catalytic activity. It is the result of enzymes that each reaction is accomplished within seconds inside the living organisms, which otherwise would have taken even days to finish up.

Substrate is the starting product in any chemical reaction. The enzymes acts upon the substrate, causes some changes in it and therefore forms the product.

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Inherited disease can be caused by damage to DNA caused by radiation (option D).

Mutation is any heritable change of the base-pair sequence of genetic material.

Mutation is a gradual change in the genetic sequence of a nucleic acid that can occur through the following ways;

Radiation is the process of radiating waves or particles like X-ray, electron particles.

Therefore, inherited disease can be caused by damage to DNA caused by radiation.

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Answer:

It produces a clear smooth liquid that combines with sperm to create semen

Explanation:

Answer: The seminal vesicle is part of the reproductive system. The vesicles have both glandular tissue and muscular tissue. The muscular tissue contracts to move seminal fluid and sperm into the urethra and out through.

Increases glomerular filtration rate (GFR) is NOT a way angiotensin II which affects the kidneys. Option A is correct.

Angiotensin II is the hormone which is involved in regulating blood pressure and fluid balance in the body. It is produced in response to low blood pressure or low blood volume and is formed by the action of the enzyme renin on a precursor molecule called angiotensinogen, which is produced in the liver and released into bloodstream.

Angiotensin II can cause vasoconstriction of the afferent arteriole, which can decrease glomerular filtration rate (GFR). It can also enhance the reabsorption of sodium and water in the proximal tubule and stimulate the release of aldosterone, which increases sodium reabsorption in the distal tubule and collecting duct.

Hence, A. is the correct option.

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deforestation takes place when . a erosion takes place b forests are not replanted c trees are cut down

C. trees are cut down

deforestation is the purposeful cutting down of the trees on a large scale area to utilize the land for agriculture, grazing, setting industries and building infrastructure.

In earlier times it was done to do slash and burn agriculture.

In mordern times, reasons for the deforestation include clearing forest for agricultural expansion, wood extraction and infrastructure development and urbanization.

Deforestation has very bad effects on our environment like climate change, soil erosion, land desertification, increased carbon emission, extreme weather condition, etc.

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Acid deposition is the deposition of acidic compounds from the atmosphere to the Earth's surface. It is caused by natural sources like volcanoes and human activities such as burning fossil fuels. Chemical equations include \(SO_2\) + \(O_2\) + \(H_2O\) → \(H_2SO_4\) and NOx + \(O_2\) + \(H_2O\) → \(HNO_3\). Acid deposition can be wet or dry, harming ecosystems and causing damage to structures. The effects of acid deposition are far-reaching. It can lead to the acidification of lakes, rivers, and soils, which can harm aquatic ecosystems and affect the growth and survival of plants and animals. Acid deposition can also damage buildings, statues, and monuments made of limestone or marble, as these materials are particularly susceptible to erosion by acids.

Acid deposition refers to the deposition of acidic compounds from the atmosphere onto the Earth's surface.

Sources of acid deposition include natural sources like volcanic emissions and the oxidation of sulfur and nitrogen compounds, as well as human activities like burning fossil fuels.

The chemical equations involved in acid deposition formation are:

  a. Formation of sulfuric acid: \(SO_2\) + \(O_2\) + \(H_2O\) → \(H_2SO_4\)

  b. Formation of nitric acid: NOx + \(O_2\) + \(H_2O\) → \(HNO_3\)

Acid deposition can be classified into two types: wet deposition and dry deposition.

  a. Wet deposition occurs when acidic pollutants dissolve in precipitation and are deposited onto the Earth's surface.

  b. Dry deposition happens when acidic particles and gases settle directly onto the ground or other surfaces without being dissolved in precipitation.

The effects of acid deposition include the acidification of lakes, rivers, and soils, which can harm aquatic ecosystems and affect plant and animal life. It can also cause damage to buildings, statues, and monuments made of limestone or marble.

A visual representation of the sources, formation, and precipitation of acid deposition can be illustrated through a diagram or drawing. This can show the emission sources, chemical reactions, and the deposition of acidic compounds onto the Earth's surface.

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Answer:

genus:  Geospiza

species:  conirostris

Explanation:

Answer:

2 x 2

dominant

recessive

Answer:

Producers are the foundation of a food chain.

Explanation:

They provide energy for all of the consumers in an ecosystem.

One of the statements reflecting a concern about the effects of global climate change on tree species is: "Climate change may lead to shifts in suitable habitats for tree species, threatening their survival."

Climate change poses significant challenges to tree species worldwide, including potential shifts in suitable habitats, increased frequency and intensity of extreme weather events, altered precipitation patterns, and changes in pest and disease dynamics.

These factors can have detrimental effects on tree growth, reproduction, and overall survival.

Concerns are raised about the ability of tree species to adapt or migrate fast enough to keep pace with the changing climate, which could lead to population declines and local extinctions.

The effects of climate change on tree species are complex and multifaceted.

Rising temperatures, changing rainfall patterns, and shifts in seasonal cycles can disrupt the delicate balance between tree physiology and the environment.

Trees may experience increased water stress, reduced nutrient availability, and heightened susceptibility to pests and diseases.

Additionally, changes in temperature and precipitation can influence seed production, germination, and seedling establishment, impacting the regeneration and distribution of tree species.

Furthermore, the loss of specific habitat types, such as montane forests or coastal wetlands, due to sea-level rise or altered climatic conditions, can threaten the survival of specialized tree species adapted to those unique environments.

Ecosystem dynamics may also be affected as tree species interact with other organisms such as pollinators, herbivores, and symbiotic partners.

In conclusion, the concern about the effects of global climate change on tree species revolves around the potential disruption of their ecological relationships, reduced habitat suitability, and increased vulnerability to stressors.

These impacts can have far-reaching consequences for forest ecosystems, biodiversity, and the valuable ecosystem services provided by trees.

Understanding and addressing these concerns are crucial for the conservation and management of tree species in the face of ongoing climate change.

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The difference between prokaryotic cells and eukaryotic cells is that a eukaryotic cell contains a nucleus, while a prokaryotic cell does not.

Eukaryotic cells are more complex and contain membrane-bound organelles, such as mitochondria and the endoplasmic reticulum, which are absent in prokaryotic cells.

Finally, eukaryotic cells are typically larger than prokaryotic cells.

Here's a summary of the differences between prokaryotic cells and eukaryotic cells:

Prokaryotic cells:

Eukaryotic cells:

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