A scientist makes an image of all of a person's chromosomes. What
technique is she using?
O
A. Use of restriction enzymes
B. Polymerase chain reaction (PCR)
O
O
C. Karyotyping
O
D. Gel electrophoresis

Answer:

Cells use lipids to get energy only when carbohydrates are not available.

lipids hope this will help you

Answer:

B. Second

Explanation:

In the second trimester the bony parts of the skeleton begin to form .

Answer:

A. First Trimester

Explanation:

The given statement is true. Enzymes can be recycled.

The chemical reactions, or metabolism, of our bodies are sped up by proteins known as enzymes. While certain chemicals are broken down, others are generated. Everything that is alive contains enzymes.

Naturally, enzymes are produced by our bodies. However, enzymes are present in both food and manufactured commodities.

One of the most important jobs of enzymes is to aid with digestion. Digestion is the process by which food becomes a source of energy. For instance, enzymes are found in our saliva, pancreas, intestines, and stomach.

The proper environment is necessary for enzyme activity. Enzymes can alter their form if certain criteria.

Therefore, The given statement is true. Enzymes can be recycled.

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The correct answer is that a butterfly  and an octopus do not have Carnegie stages of development, while elephants and turtles do. This is because Carnegie stages of development are stages found only in the development of the vertebrate embryo.  Carnegie stages can be defined as a system in embryology, which include 23 stages of the embryonic development, each characterized with the different age, size and morphologic characteristics of an organism.

Organisms in the animal kingdom are classified based on their body morphology, developmental pathways, and embryological development. The Carnegie stages of development refers to the classification of human embryos based on their physical and internal features at different stages of development.

Classifying Organisms by their Developmental Stages
Organisms in the animal kingdom are classified based on their body morphology, developmental pathways, and embryological development. The Carnegie stages of development specifically refer to the classification of human embryos based on their physical and internal features at different stages of development.

For example, the Carnegie stages can help identify when specific organ systems start to form or when major developmental milestones occur. However, it's important to note that the Carnegie stages are specific to human embryonic development and may not be applicable to all organisms in the animal kingdom. Other organisms may have their own unique classification systems based on their own specific developmental characteristics and stages.

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Answer:

The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.

Speciation is the evolution of one species into two different kinds, and when they become isolated, that is the final step, since they cannot interbreed any longer.

Answer: The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.

Explanation:

Speciation is a process of development of new species from the parent species. This occurs when the members of the population get separated due to geographical barriers such as river, mountains and others. Or if the members of the same species diverge on the basis of morphological, physiological, reproductive and behavioral changes.

The isolated members in the end in the cases of geographical separation becomes diverge or different species as they cannot interbreed with the members of the parent species due to the adaptations according to the new environment.        

Answer:

the answer is B

Explanation:

One forms glucose and the other breaks it down.

Energy is defined as the ability to do work which for biology purposes, can be thought of as the ability to cause some kind of change.

Energy can take many different forms:

Hence, B option is correct.

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Answer:

conduction is a correct answer.

Explanation:

Heat is transferred by three ways:

Conduction

Convection

Radiation

Conduction:

Heat is transferred to the Earth's surface through the process of Conduction,since air is not a good conductor, so most of the energy near Earth's surface is transfer by the conduction.

.

Answer:

The answer is C.) radiation.

Explanation:

Conduction involves two objects touching, convection is the motion of energy moving in a circular motion, and reflection is the motion of something reflecting off of another object. Radiation is the correct answer.  

Answer:

The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.

Explanation:

The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.

Answer:

Answer:

The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.

Explanation:

The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.

Explanation:

Answer:

Bases form hydrogen ions (H+) when dissolved in water - False

Bases in chemistry are substances that acquire hydrogen ions or donate the valence electron.

The given statement is False.

Therefore, Bases does not form hydrogen ion when dissolved in water.

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Answer: Humans get the nitrogen they need by eating plants or other animals that contain nitrogen.

Explanation: When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.

Nitrogen is one of the essential component for human body as it helps in protein synthesis by getting involved in amino acid formation. Human gets nitrogen either from environment or through nitrogen-rich diet.

All tissues in the human body require nitrogen as an essential component.

it helps in making proteins in the muscles, skin, blood, hair, nails as well as DNA.

Human obtains protein through atmosphere as it comprises of 80% nitrogen as well as from diet.

Thus, it can be concluded that these are the sources of nitrogen for human beings.

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Answer:

D

Explanation:

If you look up pictures of a Ragdoll cat, you'll see that they have blue eyes and the answer choice D is the only cat with blue eyes.

Answer:

The correct answer is option D.

Explanation:

The ragdoll is a breed of cats. This breed has blue eyes and a colorpoint coat with semi-long hair and large in size. They are known for their placid temperament and affection.

Grumpy can identify ragdoll cat by its physical properties and blue color eye. In option D the cat has blue eyes, semi-long hair and larger in size.

Thus, the correct answer is option D.

In a long bone, such as the femur in the leg, the center of the bone contains Marrow, responsible for producing blood cells.

The spongy material called bone marrow is located in the middle of the bones. It produces things like bone marrow stem cells, which go on to make blood cells.

Each type of blood cell that the bone marrow produces performs a crucial function.

Bone marrow stem cells is the blood that circulates in the veins and arteries of all normal people. These stem cells are known as peripheral blood stem cells (PBSC). Patients recovering from chemotherapy and healthy people who are treated with certain drugs that stimulate the growth of the bone marrow have relatively large numbers of PBSC in their blood.

Therefore, In a long bone, such as the femur in the leg, the center of the bone contains Marrow, responsible for producing blood cells.

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Answer:

things that you can use numbers to express

Explanation:

In sexual reproduction, a diploid zygote is formed by the fusion of two structures: a haploid egg and a haploid sperm. These cells, also known as gametes, each contain one set of chromosomes, and their fusion results in a zygote with a complete diploid set of chromosomes.

In sexual reproduction, the structures that fuse to form a diploid zygote are the haploid egg and the haploid sperm cells. These cells are also referred to as gametes. Each of these gametes is haploid, meaning they contain one set of chromosomes in their nuclei. The zygote, which is the cell that results after the fusion of these gametes, is diploid and contains two sets of chromosomes. For example, in animals, sexually reproducing adults form these haploid gametes from diploid germ cells. The fusion of these gametes gives rise to a fertilized egg cell, or zygote.

This process of fusion, called fertilization, ensures that the offspring has a complete diploid set of chromosomes. Later, the zygote will undergo multiple rounds of mitosis to produce a multicellular offspring, which is genetically unique.

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The structures that fuse to form a diploid zygote during sexual reproduction are the haploid egg and sperm cells. They fuse together during fertilization to create a new individual with a complete set of chromosomes.

The structure that fuses to form a diploid zygote during sexual reproduction is the haploid gametes, specifically the egg and sperm. In this process, the haploid sperm and egg cells fuse, leading to the formation of a diploid zygote. The diploid zygote contains the combined genetic material from both parents, which is vital for creating a new individual. To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. This fusion of gametes is called fertilization.

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Answer:

d) stomata

Explanation:

CAM plants lose their stomata during the day and open them at night.

Therefore, CAM plants do not lose thylakoids, chloroplasts, or vascular bundles during the day and open them at night.

The correct answer is D. 1 AU

Explanation:

In astronomy, the distance from Earth to the Sun that is also used to measure the distance from the sun to other planets or any other elements in the space is known as AU or Astronomical Unit, this covers around 150 million kilometers and is one of the most used units especially to describe the distance of objects in our solar system. This also implies 1AU refers to the distance of the Earth to the Sun; although the distance varies slightly depending on the position of the Earth in the orbit. Therefore, the unit that is closest to the distance of the Earth to the sun is 1 AU.

1AU is the astronomical units closest to the distance of the earth to the sun.

Below is the mean distance from sun to each planet  in Astronomical unit (AU)

The Astronomical unit, AU is the means distance from the earth to the sun. Actually, the distances between from the earth and the sun varies and primarily depend on the time of the year. This is simply because the earth orbit within the sun is certainly not a perfect circle. The astronomical distance is about 93 million miles.

The distances within the solar system are measured in Astronomical units (AU). The innermost planet, mercury has a mean distance of approximately 0.4 AU to the sun. Also, Neptune, one of the known distant planets has a radius of approximately 30 AU. However, the parsec is used to express the distance the Interstellar and intergalactic.

The first month, January is the time that the earth is closest to the sun and far away from in July. In January the distance from the earth to the sun is about 0.983 AU and the mean or average distance from the earth to the sun is approximately 1.017 AU in July.

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Answer:

The Cytoplasm is definitely the answer.

Explanation:

Answer:

Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt.

Explanation:

Both Obsidian and Basalts are igneous rocks. Igneous rocks from the solidification and cooling of magma.

The textures of igneous rocks relies mostly on their mode of formation. Igneous texture refers to the way minerals are formed and arranged in rocks.

When magma forms and cools rapidly, crystals of minerals don't have time to grow. This leads to the formation of a rock that would look like glass. An example of such rock is Obisdian. Obsidian's glassy and smooth texture is as a result of the way it was formed. This rock type is an extrusive igneous rock that forms on the surface where cooling magma solidifies rapidly and crystals have little to no time to solidify.

Basalt on the other hand is an extrusive igneous rock. The mineral grains here have some ample time to form. Basalt is made of mafic minerals which impacts some very interesting textures on the rock mass. The texture of a typical basalt is fine grained and the minerals can be seen when magnified. Cooling is not as rapid during the formation of basalts compared to obsidian.

Answer:

it is b

Explanation:

Answer: The role of an organism in the ecosystem is called its NICHE.

Explanation: The niche (pronounced 'neesh') of an organism is the specific function and purpose of the organism within its environment, ecosystem or food-web or food-chain.

Answer:

niche

Explanation:

Answer: B. The occipital lobe

This submarine Mid-ocean Ridge owes its formation to the movement of the continental plates on either side of the ocean. As these plates slowly separate, they leave gaps in the earth's crust. This allows molten rock from beneath the earth's crust to reach the surface, forming a new part of the ocean floor.

Answer:

The stretching lithosphere is pushed up as the plate moves apart

Explanation:

Divergent tectonic plates involves moving apart of tectonic plates. At the divergent boundary plates separate from each other . An example is the oceanic ridge formed in the Atlantic oceanic crust.  

The diverging movements of these plates cause magma to be introduce from the oceanic ridge to form a new lithospheric crust. Volcanoes  are present in this kind of boundary.  The magma may erupt to form volcanoes.

Divergence occurs mainly between oceanic crusts and continental crusts. The moving apart of the plates causes an exposure of the aesthenosphere semi liquid rocks to the surface . The up welling of this rocks result to formation of new crust, stretching the Lithosphere in the process.

The picture above illustrate diverging plates.

Answer:

X-ray crystallography

Explanation:

Its was a key technique to study and explain the structure of DNA based on X-ray shot's pattern, which was formed when these shots passed through the crystal of particular substance. This pattern provided information about molecular structure of DNA.

X-ray crystallography involves aiming X-rays at a crystal to generate a diffraction pattern, which is used to determine the 3D structure of a molecule. This technique was critical in discovering the double helix structure of DNA.

X-ray Crystallography and the Structure of DNA

Complete question:

_was a key technique used to explain the structure of DNA

A. NMR spectroscopy

B. Electron diffraction

C. X-ray crystallography

D. Electron microscopy

During transcription, mRNA is synthesized using the antisense strand of DNA as a template, resulting in an mRNA sequence that matches the sense strand of DNA, with uracil (U) replacing thymine (T).

During the process of transcription, the mRNA is synthesized using the antisense strand of DNA as a template. This results in the mRNA sequence matching the sequence of the sense strand of DNA, with the exception that uracil (U) is incorporated in place of thymine (T). Therefore, the correct answer is:

The sense strand of DNA is also known as the coding strand because its nucleotide sequence corresponds to the codons that are translated into protein. During transcription, the mRNA synthesized is indeed complementary to the antisense strand, which is the template strand, and matches the sense strand except that uracil replaces thymine.

Answer:

uhhh we need more info

Explanation:

Answer:

During photosynthesis a plant absorbs light energy using the pigment chlorophyll. This allows it to convert carbon dioxide and water into glucose. This glucose is:

transported to the growing parts of the plant for use in respiration

transformed into cellulose, proteins and oils

turned into starch for storage

Therefore, to test if a plant has been photosynthesising, you can test the leaf to see if starch is present.

Animals ( or plants ) store solar energy as chemical energy between atoms of their molecules.

For example : ATP is phosphate energy bonds stored by animals in their molecules.

For more stable form animals also store energy in carbon bonds called carbohydrates. The most common e carbohydrates are starch, sugar and fats. Animals have enzymes to convert these forms of energy into actual form which they use for their activities like move, run or fly.