Plant and animal cells have similarities and differences. One difference is that plant cells have organelles called chloroplasts. What is the reason that plant cells have chloroplasts, but animal cells do not have chloroplasts?
A) Animal cells have more vacuoles and do not have space for chloroplasts.
B) Animal cells make their own food but use different organelles for the process.
C) Chloroplasts are used in the process of photosynthesis, where plants make their own food.
D) Chloroplasts are not needed in animal cells, because animal cells do not have a green color.

b. A plane dividing the body into upper and lower sections is the best representation of a transverse plane in relation to the human body. It cuts across the body horizontally, perpendicular to the longitudinal axis, separating the upper portion (superior) from the lower portion (inferior). So, option B is the right choice.

Therefore, option b. (a plane dividing the body into upper and lower sections) is the best representation of a transverse plane in relation to the human body.

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The complete question may be like:

Which of the following best represents the orientation of a transverse plane in relation to the human body?

a. A plane dividing the body into front and back sections.

b. A plane dividing the body into upper and lower sections.

c. A plane dividing the body into left and right sections.

d. A plane dividing the body into diagonal sections.

Evolutionary convergence Within a species, there are polymorphisms and convergent evolution. Species-level morphological polymorphisms Due to mimicry, two distinct species appear to be identical.

This schematic illustration shows how several species developed from a number of shared ancestors. The two-dimensional graph that depicts the evolutionary link between an organism and several other organisms is known as a phylogenetic tree.

The evolutionary relationships between a collection of creatures or groups of organisms, known as taxa, are represented by a phylo, or evolutionary tree (singular: taxon). The nodes of the tree symbolize the mixed ancestry of those descendants, while the tips of both the tree indicate groups of descendant taxa (typically species).

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The causes are :

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The examples of positive feedback loops are:

c) "the stretching of the cervix leads to an increase in contractions during childbirth".

e) "the levels of calcium in the blood are low, leading to an increase of PTH to return the levels to normal".

In a positive feedback loop, the initial stimulus leads to an amplification of the response, resulting in further stimulation of the system. In these examples, the stretching of the cervix during childbirth and the decrease of calcium levels in the blood both lead to a response that amplifies the initial stimulus, leading to an increased response.

In options a, b, and d, the responses are examples of negative feedback loops, where the initial stimulus leads to a response that opposes the stimulus, leading to a return to homeostasis. For example, the production of red blood cells after significant blood loss, the innervation of the heart via the vagus nerve when the heart experiences tachycardia, and the increase of urine output when blood pressure is high are all negative feedback loops.

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Answer:

Decreases.

Explanation:

Biodiversity may be defined as the variety of the living organism found in the earth. The diversity of the species may get affected and do not have any constant number.

The natural or human made calamity can decrease the species diversity. The fire on a grassland causes the death of many species, have harmful effects on many species and reduces the species number as well. This decreases the species diversity of the grassland.

Thus, the answer is decreases.

Recent research on Arabidopsis has shown that florigen is probably

a) A hormone that promotes flowering

A methylated cytosine undergoing spontaneous deamination within an exon at position 49,076 on Chr. 2 in species X would result in the conversion of cytosine (C) to uracil (U). This change alters the base pair configuration at that position.

In normal DNA, the cytosine (C) base pairs with guanine (G). However, after deamination, the cytosine is converted to uracil (U), which normally pairs with adenine (A) instead of guanine. So, following deamination, the base pair configuration at that position changes from cytosine-guanine (C-G) to uracil-adenine (U-A).

During cellular replication, the DNA strands separate, and each strand serves as a template for the synthesis of a new complementary strand. In this case, since the deaminated cytosine is paired with adenine, during replication, the daughter strand would incorporate thymine (T) instead of guanine (G) opposite the uracil (U) in the template strand.

Therefore, the daughter cells would inherit a uracil-adenine (U-A) base pair at that position in their replicated DNA strands.

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Answer:

Mitochondria provides energy to the cell

Explanation:

. there gills help them to breath oxygen in water.

. there fins help them to move in water

Answer:

the airplane slowed down; it came to a stop over 53 seconds, which requires slowing. the airplane decelerated; decelerate is another word for slow down, it also is the opposite of accelerate.  The answer should be negative; negative velocity is slowing down. And the acceleration is ~ -11.509 meters every second

Explanation:

the explanations are included in the answer.

Answer:

A) The airplane slowed down. It states that the plane lands and come to a complete stop over a 53 second period.

B) It decelerates. The speed doesn't increase. It slows down.

C) The answer should be positive. Although the deceleration is slowing down the plane, it's not going at a negative speed.

D) The answer is 11.5m/s. I divided the velocity by the amount of seconds it takes to make a complete stop.

Explanation: Just cuz

Delta's role in regulating cell communication through the Notch signaling pathway is that Delta restricts cell communication to short distances within a developing embryo.

Chemical signals are typically used by cells to communicate. These chemical signals, which are proteins or other molecules made by the sending cell and released into the extracellular space, are frequently secreted by the cell. They can then travel to nearby cells by floating there, much like messages in a bottle.

During the development of fruit fly embryos, the receptor protein notch is visible on the surface of some cells. The protein delta, which is membrane-bound and expressed on the surface of neighboring cells, is the ligand for the notch. The intracellular tail of the notch protein separates from the rest of the protein when notch is activated by its ligand. Consequently, the intracellular tail can move to the cell's nucleus and change the way some genes are expressed.

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Answer:

B.) Dinosaur footprint

Answer:

    One of the most common Monera is Escherichia coli, also known as E. coli.  "[E. coli] is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms." States ________.* Signs of E. coli are stomach pains and cramps, diarrhea that may range from watery to bloody, fatigue, loss of appetite or nausea, vomiting, and low fever < 101 °F/ 38.5 °C (not all people have this specific symptom).

    E. coli comes from human and animal wastes. During precipitation, E. coli may be washed into creeks, rivers, streams, lakes, or groundwater. Another way to get it is from contaminated food, a lot like corona virus. When cattle are slaughtered and processed, E. coli bacteria in their intestines can get on the meat. And when ground beef is made, it combines meat from many different animals, increasing the risk of contamination.

*Look at comments

Answer:

i got the diagram

Explanation:

The brain and spinal cord are parts of the central nervous system, while the nerves and all the sensory receptors and motor neurons are part of the peripheral nervous system.

The brain is divided into two hemispheres: the left hemisphere and the right hemisphere. These two hemispheres are connected by a network of nerve fibers located in the brain’s center called the callosum (the brain’s central nervous system). Each of the four hemispheres is divided into four lobes (or sections), all of which are connected to each other. The CNS is responsible for cognitive functions such as thinking, reasoning, emotion, language, and movement.

The peripheral nervous system can be broken down into two sub-systems: the Autonomic (ANS) and the Somatic (SNS) nervous system. The Autonomic Nervous System controls voluntary bodily functions and controls glands. The Somatic Nervous System (SNS) controls muscle movement and sends signals from the ears, eyes, skin, and other parts of the body to the centrally located nervous system.

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The true statement about the fossil record is: The fossil record provides evidence of past life forms and helps people understand life on Earth millions of years ago.

The fossil record consists of preserved remains, traces, or imprints of organisms that lived in the past. It provides valuable information about the diversity, morphology, and behavior of ancient organisms, as well as their evolution over time. By studying fossils, scientists can reconstruct the history of life on Earth, including the appearance and disappearance of different species, the emergence of new groups of organisms, and the changes in ecosystems and environments throughout geological time. The fossil record is an important source of evidence for understanding the evolutionary processes that have shaped life on our planet.

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Answer:

Gaseous cycles include those of nitrogen, oxygen, carbon, and water; sedimentary cycles include those of iron, calcium, phosphorus, and other more earthbound elements. In a sedimentary cycle elements move from land to water to sediment. Main reservoirs are the soil and sedimentary rocks.

Answer:

Renewable Resources:

Air

Fish

Trees

The painful pressure caused by accumulation of blood under a fingernail or toenail can be relieved by draining the blood out.

What causes painful pressure under fingernail or toenail?

The accumulation of blood under a fingernail or toenail is known as a subungual hematoma. A subungual hematoma is a medical condition that occurs when blood accumulates underneath the nail. It can be caused by various things, including jamming your finger or toe or being hit with a heavy item.Most of the time, subungual hematomas are not severe and can be treated at home.

However, it can be painful and uncomfortable. If you have a subungual hematoma, you can relieve the pressure by draining the blood out. To do this, you can use a sterilized needle. It is essential to use a sterilized needle to avoid infection. You can sterilize a needle by placing it in boiling water or using alcohol. Once you have a sterilized needle, use it to puncture a hole in the nail to allow the blood to flow out. You can also apply an ice pack to the area to help relieve pain and swelling.

Furthermore, if the subungual hematoma is severe and causes severe pain or discomfort, it is best to see a doctor. The doctor may drain the blood out by making a small hole in the nail or, in severe cases, remove the nail entirely.

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The stimulus in the insulin reflex that regulates blood glucose levels is an increase in blood glucose levels.

When blood glucose levels rise, the pancreas releases insulin, which helps cells in the body take up glucose from the blood and use it for energy. This helps to lower blood glucose levels and maintain homeostasis.

If blood glucose levels fall too low, the pancreas releases glucagon, which stimulates the liver to release stored glucose into the blood. This helps to raise blood glucose levels and maintain homeostasis. The insulin reflex is an important mechanism for regulating blood glucose levels and maintaining overall health.

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"A tough protective covering on spores" is the correct answer option A, Option B, C, D, and E are not accurate descriptions of sporopolylenin.

Sporopolylenin is a tough, resistant biopolymer that forms a protective covering on the outer surface of spores. It is commonly found in various plant species, particularly in pollen grains. Sporopolylenin provides durability and protection to spores against environmental stresses, such as desiccation, UV radiation, and microbial degradation, allowing them to survive harsh conditions and remain viable for dispersal and germination.

Therefore, option A - "A tough protective covering on spores" is the correct answer.

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Complete Question-

What is sporopolylenin?

A. A tough protective covering on spores.

B. Pollen that is produced by a sporophyte.

C. The conversion of pollen to spores.

D. A capsule housing pollen.

E. Food stored in pollen for the growing embryo.

Integrity is the strongest skill kevin is having .

Integrity is the quality of being honest and have morals to follow . It involves sticking by your promise taking responsibility and treat others with due respect . Integrity teaches you doing the right thing in reliable way and achieving the goals.

Integrity is the most admirable personality trait that means the wholeness of the character .Integrity is the quality of having strong ethical or moral principles and obeying them every times. A person with integrity acts with honesty, honor, and truthfulness. Example includes when you are at workplace you obey the time and take whole sole responsibility of the work you are doing .

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Answer:sediment

Explanation:

Answer:

i can’t see the answer choices

Explanation:

According to the given information Bifid spinous process  feature is unique to the axis.

The point of attachment for the muscle and ligaments of the spine is the spinous process, which protrudes where its laminae of the vertebral arch converge. The ridges running down the back of spine are known as spinous processes.

Locate the sacrum between the ilia's posterior borders, then move your hand down to the fifth lumbar vertebra and the dip or root of the sacrum. The L4 spinous process can be located by counting up one level. Typically, the L4 vertebral column is bigger than the L5 process.

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Organisms that take up inorganic nutrients and convert them into organic molecules such as carbohydrates and proteins are called autotrophs.

Autotrophs are capable of synthesizing their own organic compounds using inorganic raw materials, such as carbon dioxide and minerals. They are primary producers in ecosystems, forming the basis of food chains and providing energy and nutrients to other organisms.

Autotrophs can be further classified into two main types:

1. Photoautotrophs: These organisms, such as plants, algae, and some bacteria, use sunlight as an energy source to carry out photosynthesis. They capture solar energy through specialized pigments like chlorophyll and convert it into chemical energy in the form of glucose or other organic molecules.

2. Chemoautotrophs: These organisms, primarily certain bacteria and archaea, obtain energy by oxidizing inorganic compounds, such as sulfur, iron, or ammonia. They use the energy derived from these chemical reactions to synthesize organic molecules.

Both types of autotrophs play a crucial role in the cycling of nutrients and the production of organic matter in ecosystems. They form the foundation of the food chain, as heterotrophs (organisms that cannot synthesize their own food) depend on autotrophs for their energy and nutrient requirements.

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A brief summary of what discoveries that occurred in  each year in relation to the studies about  DNA is given as follows:

Deoxyribonucleic acid (DNA) is a polymer made up of two polynucleotide chains that coil around one another to create a double helix. The polymer contains genetic instructions for all known organisms and viruses' genesis, functioning, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid.

The information molecule is DNA. It holds instructions for the production of larger molecules known as proteins. These instructions are kept within each of your cells and are dispersed across 46 lengthy structures known as chromosomes. These chromosomes are composed of thousands of shorter DNA pieces known as genes.

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Answer:

a

Explanation:

Answer:

biosphere, geosphere, hydrosphere

Explanation: