Answer:
23
Explanation:
The atomic number is determined by the number of protons.
The atom of element A would have an atomic number of 23 since the atomic number is equivalent to the number of protons in an atom's nucleus.
This number defines the chemical element and determines its identity. By comparison, uranium has an atomic number of 92 and thus, 92 protons.
Explanation:An atom of element A with 23 protons would have an atomic number of 23. This is because the atomic number is defined as the number of protons in an atom’s nucleus, and it uniquely identifies the chemical element.
For example, any atom with 6 protons is known as carbon and has an atomic number of 6. An element's atomic number also tells you the number of electrons in a neutral atom of that element.
In relation to other elements, the atomic number of uranium is 92, indicating it has 92 protons. For an isotope of uranium with a mass number of 235, the number of neutrons would be the mass number minus the atomic number, which is 235 - 92, equating to 143 neutrons.
Genetic diversity is the variation in the genes of an entire species. Each circle represents a population of a particular species in different habitats. Select the population with maximum genetic diversity
Answer:
The second image from left side
Explanation:
Genetic diversity refers to the various genes and their respective alleles present in all the populations of a species. In the given image, the second image from the left side has one yellow, two blue, one red and one green dot. So, it has a total of four types of genes (yellow, red, green and blue) as indicated by dots. Since this circle has the maximum number of different types of dots, it represents the population of the species with maximum genetic diversity.
Answer:
The answer would be the second one
Explanation:
It has a bigger diversity
what cause for the different seasons on earth
Answer:
Tiltation of the earth
Explanation:
Seasons occur because of the tiltation of the earth and is tilted at an angle of 23.5°. The earth continuously moves around the sun in its elliptical path. Due to this, the sunlight is incident on the earth at different times causing the four types of seasons namely, spring, autumn, winter and summer.
When the earth's imaginary axis of rotation is tilted towards the sun, then the summer season occurs and the opposite side experiences a winter season. During the summer season, the earth is farthest from the sun and this position is called Aphelion whereas during winter the earth and the sun are at its closest position and this is known as the Perihelion.
Since the earth comes closer to the sun in winter, it should experience hotter weather but it experiences cold weather due to its tiltation.
The refractory period is..
I. An increase in the electrical gradient across a membrane
II. A period when the neuron is insensitive to depolarization
III. A decrease in the electrical gradient across a membrane
A. II only
B. I and II only
C. I only
D. I, II, and III
E. III only
Answer:
e is your answer
Explanation:
1 Point
Which of the following is the best definition of a system?
O
A. A group of objects and materials that are interrelated
O
B. Anything that takes up space and has mass
O
C. The form and arrangement of an object or material
O
D. A collection of cells that share the same function
SUBMIT
Answer:
B. Anything that takes up space and has mass
A group of objects and materials that are interrelated is the best definition of a system. Therefore, the correct option is A.
What is a system?A system refers to a set of interconnected components that work together to achieve a common goal or purpose. Systems can be found in various domains such as science, engineering, social science, and technology. In a system, the individual components or parts are interdependent and their interactions affect the behavior of the system as a whole.
In a human body there are many systems such as the circulatory system, the respiratory system, the nervous system, the skeletal system etc. These systems work together for the overall functioning of the body effectively.Therefore, the correct option is A.
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PLEASE HELP, WILL GIVE BRAINLIEST!!
In your own words, justify the statement, "Oceanic conditions determine human activities."
Answer:
The statement "oceanic conditions determine human activities" may be interpreted in many ways.
Oceanic conditions determine human activities in that the moon cycle influences the tide. As the moon cycle is said to greatly influence human activity, and the tide changes as the moon does, it may also be concluded that the tides have a similar influence on human activity.
Explanation:
The way humans treat the Earth and the Ocean depends on how the ocean will be and it's conditions. If people keep producing more and more waste soon humans will be forced to put the garbage in the ocean because there will be no more room in landfills. If humans think about how there actions are affecting earth and the Ocean then there can be a big change for the better.
Hope this helps :D
P.S. this was all in my own words :)
If this helped please mark brainliest
-A. Hazle
Two different versions of a gene are referred to as
Gene variants that arise by mutation and exist at the same relative locations on homologous chromosomes are called alleles. Heterozygosity and homozygosity refer to individuals having two different or identical alleles of a gene on their homologous chromosomes, respectively.
Explanation:Gene variants that arise by mutation and exist at the same relative locations on homologous chromosomes are called alleles. In diploid organisms, two different versions of a gene on their two homologous chromosomes result in being heterozygous for that trait. Conversely, when an organism has two identical alleles of a gene on their two homologous chromosomes, they are considered homozygous for that trait.
Question 3(Multiple Choice Worth 4 points)
(02.04 LC)
Which best describes the function of chloroplast?
Allows certa molecules to enter and exit the cell
Makes food during photosynthesis
Detoxifies waste products
O Packages proteins into vesicles
Answer: Option B.
Explanation:
Chloroplast is defined as an organelle found in green plants that contains green pigment called chlorophyll responsible for the process of photosynthesis.
Chloroplasts plays an important role in photosynthesis which is to trap light energy from sunlight and convert it into carbohydrate which further used by cells in teh form of adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate hydrogen (NADPH).
Hence, the correct option is B.
Depending on the organism the number of in a cell may change
The blank plays in important role in coordination and the control of body movements
Answer: Cerebellum
Explanation:
Answer:
The Cerebellum
Explanation:
This part of the brain is responsible for many aspects of controlling the body but most notably this section controls coordination, movement, balance, posture and most motor skills.
glycolipids and glycoproteins function as __ in the cell membrane
enzymes
cell recognition
pumps involved with active transport
exit points for water passing out of the cell by osmosis
Answer:
cell recognition components
Explanation:
glycolipids and glycoproteins function as cell recognition components in the cell membrane.
glycolipids and glycoproteins refer to lipid and proteins on the cell membrane surface that often have short carbohydrate chains protruding out from the cell surface.
glycolipids and glycoproteins function as cell recognition in the cell membrane.
In the complex mosaic structure of the cell membrane, glycolipids and glycoproteins are embedded, presenting carbohydrate chains on the extracellular surface.
These carbohydrate chains participate in cellular recognition processes, allowing cells to identify and communicate with each other. This recognition is vital for processes like immune responses, tissue development, and the maintenance of bodily functions.
Cell recognition is not only crucial in physiological processes but also in disease defense. For instance, immune cells use recognition to distinguish between the body's cells and potentially harmful invaders such as bacteria or viruses. This mechanism forms the basis of the immune response.
Conversely, glycolipids and glycoproteins do not primarily function as enzymes or pumps involved in active transport. Enzymes are typically proteins that catalyze chemical reactions, facilitating metabolic processes within the cell.
Active transport involves specialized proteins (pumps) that move molecules across the membrane against their concentration gradient, requiring energy.
Furthermore, they are not the exit points for water passing out of the cell by osmosis. Osmosis, the movement of water across a semipermeable membrane, is regulated by specific proteins like aquaporins.
These proteins create channels for controlled water movement, playing a critical role in maintaining cellular hydration and osmotic balance.
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Question 2 (1 point)
A ______ is a measure of energy in food.
gram
carbohydrate
calorie
none of the above
Answer:
calorie
Explanation:
gram is weight carbohydrate is a type of food
When is your respiratory rate likely to change
Answer:
Receptors in the brain detect low oxygen or high carbon dioxide and send signals to the body, which can change the breathing rate. ...
option C
Which is a function of the spinal cord?
Answer:
It is the bodies central nervous system and connects a number of peripheral nerves to the brain.it also sends out information from the brain to parts of the body.
Hope this helps and if it does pls mark as branliest answer thx
Answer:
Spinal cord is about 45 cm long and is present in the vertebral canal of vertebral column. It is made up of two nervous tissue grey matter and white matter. It extends from upper atlas to lower region of first lumbar vertebra.
Through spinal cord many nerve arise which contain sensory and motor axons which perform function of signal transduction. The spinal cord performs two major functions:
1. It transmit the sensory impulse from sensory ascending tracts and motor impulse from motor descending tracts to and from the brain.
2. Helps in generating reflex action very fast by activating motor neurons present in spinal cord.
Could a cell be the size of an elephant? Explain your answer
Answer:
no
Explanation:
actually cells are the smallest unit if life and there so small that you need a microscope to see them so they can't be the size of an elephant
A cell could theoretically grow to the size of an elephant, but it would not be practical due to the decrease in the cell's surface area to volume ratio. This would prevent efficient nutrient uptake and waste removal, resulting in cell death.
Explanation:In theory, a cell could grow to an extremely large size. However, in practice, this would be highly impractical due to the surface area to volume ratio of a cell. This ratio determines how efficiently a cell can exchange materials with its surroundings. As a cell grows larger, its volume increases much more rapidly than its surface area. If a cell were the size of an elephant, this ratio would be so small that the cell would not be able to get enough nutrients or remove waste efficiently, causing it to die. Therefore, a cell could not realistically be the size of an elephant.
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State why a constant supply of glucose and water are so important to the cell of a plant
A constant supply of glucose and water ensures that plant cells have the necessary energy, raw materials, and hydration for growth, metabolism, and maintaining cell turgidity and functionality.
A constant supply of glucose and water is crucial for the cells of a plant due to their vital functions and roles in cellular processes. Here are the reasons why they are important:
Glucose (Sugar):Energy Production: Glucose is a primary source of energy for plant cells through cellular respiration. It undergoes metabolic reactions to generate ATP (adenosine triphosphate), the energy currency of cells.Biosynthesis: Glucose serves as a building block for the synthesis of other organic molecules, such as cellulose, starch, and various types of carbohydrates, which are essential for cell walls, storage, and structural support.Water:Solvent and Transport: Water is the universal solvent in which many cellular reactions occur. It facilitates the transport of nutrients, minerals, and hormones within the plant and between cells.Photosynthesis: Water is a crucial component for photosynthesis, the process by which plants convert light energy into chemical energy. Water is split during photosynthesis, providing electrons for the production of glucose and releasing oxygen.Learn more about Plant cell, here:
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what makes metals in particular good conductors of electricituly
Answer:
Metals are good conductors of electricity because of the ability of electrons to flow throughout the metal.
Explanation:
In metals, the outer electrons of the atoms belong to a 'cloud' of delocalised electrons. They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions, these factors makes them a good conductor of electricity. Electric current is the flow of electrons in a wire. In metals, the outer electrons of the atoms belong to a 'cloud' of delocalised electrons. They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions, these factors makes them a good conductor of electricity .
Answer:
Electron flow in the metals.
Explanation:
Metaks may e defined as the substances that has the ability to lose the electrons and gains a positive charge. The metals are lusturous, shiny and shows conductivity.
The conducrtivity of electricity occurs due to the movement of electrons in the metals. The electrons present inside the metal has the ability to move freely in its structure and hence conduct electricity.
Which statement describes an endocrine function rather than an exocrine
function?
A. Salivary glands release saliva into the mouth.
B. Sweat glands release sweat onto the skin
C. The pineal gland releases melatonin into the blood.
D. Esophageal glands release mucus into the esophagus.
The pineal gland releases the melatonin into the blood which describes an endocrine function rather than an exocrine function.
Option C
Explanation:
The endocrine gland releases hormones directly into blood which travels through it to reach the target organ. Whereas, the exocrine glands releases their hormones directly into the duct from which they were released to the target area except pineal gland all other gland in the options are the example of exocrine glands.
Which of the following is true of innate behaviors that are described as instincts?
A. Instincts aren't governed by genetics, while innate behaviors are.
B. Instincts are complex series of innate behaviors.
C. Instincts are sudden, situational behaviors.
D. Instincts are governed by genetics, while innate behaviors are not.
Hi,
Which of the following is true of innate behaviors that are described as instincts?
C. Instincts are sudden, situational behaviors.
Answer:
maybe A. Instincts aren't governed by genetics, while innate behaviors are.
Explanation:
I put instincts are sudden, situational behaviors and it was wrong plus the book says "behaviors that are inherited through genetics are called innate behaviors."
what does it mean if there are two different alleles for a trait
Answer:
They are know as heterozygous alleles.
Explanation:
Two IDENTICAL alleles are known as homozygous alleles.
I hope this helps you understand the difference, and as always, I am joyous to assist anyone at any time.
Answer:
heterozygous
Explain im smart
How would a biologist classify the plant stem shown?
A. Haploid stem
B. Dicot stem
C. Monocot stem
D. Gametophyte stem
Answer:
The correct answer is option B- Dicot stem.
Explanation:
The vascular tissues in the dicot stem are present in the ring form with pith concentrated at the centre of the stem with xylem and phloem separated by the vascular cambium. This type of arrangement with xylem, phloem, pith with no leaf gaps is known as "eustele" which is a characteristic feature of dicot stem.
Since the given diagram shows the ring arrangement of vascular bundles, therefore, the correct answer is option B.
In the dicot stem, the vascular bundles are arranged in a ring, with pith concentrated at the core of the stem, rather than being scattered throughout the plant interior. In each vascular bundle, the xylem and phloem are separated by a substance called vascular cambium.
What is the term for the protective wall that helps bacteria survive unfavorable conditions? A. endospore B. botulism C. aerobic wall D. sporangia
Answer:
The answer is A
Explanation:
Endospores is the protective wall that helps bacteria survive unfavorable conditions.
What is Endospores?An endospore is a dormant, tough, and non-reproductive structure produced by certain bacteria from the Firmicute phylum. Endospore formation is usually triggered by lack of nutrients, and usually occurs in Gram-positive bacteria. In endospore formation, the bacterium divides within its cell wall. It allows the bacterium to produce a dormant and highly resistant cell to preserve the cell's genetic material in times of extreme stress. Endospores can survive environmental assaults that would normally kill the bacterium.
Therefore, (A) option is the correct answer.
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How many strands does a RNA molecule have
Answer:
The DNA has one strand while the RNA have two complementary strands, similar to the DNA found in all cells.
Explanation:
RNA molecules are single-stranded but show extensive intramolecular base pairing. This base pairing creates a predictable three-dimensional structure that is essential for the function of RNA.
Explanation:RNA molecules are single-stranded, unlike the double-stranded DNA. However, most types of RNA show extensive intramolecular base pairing between complementary sequences within the RNA strand, creating a predictable three-dimensional structure. This structure is essential for the function of RNA.
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1. Headlights from an oncoming vehicle can have a blinding effect.
A. true
B. false
Answer: A true
Explanation: The glare from the other vehicles headlights can blind you for about three seonds.
which of the following technological advancements was necessary before scientists could study samples from the surface of the moon
Answer:
Flight was necessary before scientist could study samples from the surface of the moon.
Explanation:
Scientist would have never been able to lift off of the ground here on Earth without the there being the first flight, nevertheless the moon haha....
Answer: flight
Explanation:which of the following technological advancements was necassary before scientists could study examples from the surface of the moon?
Look at the photo of the leaf. Which term best describes this leaf?
Answer:
D simple leaf
Explanation:
Search up pictures of each leaf, and you'll see patterns
A simple leaf best describes this leaf. thus option D is correct.
What is a leaf?The leaf is made up of a large blade (the lamina) that attaches it to the plant stem. Stipules are a pair of structures found on either side of the leaf base in plants that resemble scales, spines, glands, or leaflike structures.
The leaf is called simple when only one blade is put straight on the petiole. Simple leaf margins might be whole and smooth, or they can be in a variety of ways. Dentate margins have teeth that protrude at right angles, whereas serrate margins have teeth that point toward the top of the leaf.
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Bernoulli’s principle explains why birds can fly because it demonstrates how the pressure under a wing is greater than the pressure above a wing
Answer:
The answer is TRUE. :)
Explanation:
Bernoulli’s Principle, a key concept in physics, illustrates how birds fly. The principle explains that faster-moving air applying less pressure than slower-moving air. This difference in air pressure above and beneath a bird's wings creates lift, enabling flight.
Explanation:Bernoulli’s Principle, a concept in physics, explains how birds can fly by demonstrating how air pressure works. According to the principle, when a fluid (in this case, air) moves rapidly, it has lower pressure. Therefore, when a bird flaps its wings, it creates high-speed airflow over the top surface of each wing, resulting in lower pressure above. On the contrary, the air flow is slower beneath the wings, resulting in higher pressure. This differential pressure leads to lift, enabling birds to fly.
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Why do living things need energy
Explanation:
All living things consist of cells in their bodies. There are trillions of cells in a human body. Cells form the structure of the body. Cells cannot survive on their own, because they continuously need energy to perform different functions of the body of the living things. Functions of living things may include growth, repair, reproduction, movement, etc. So cells take nutrients from the food which a living thing eats, convert those nutrients into energy and then use that energy to perform the above mentioned tasks. So Energy is needed by all living things to stay alive.
Living things need energy for growth, metabolism, reproduction, and maintenance.
Life requires energy. Growth requires energy to synthesise chemicals and develop complex structures. Energy is needed to break down foods, create ATP (adenosine triphosphate), and perform cellular functions in metabolism. Gametes and offspring require energy, whether asexual or sexual.
Maintaining body temperature, muscular contractions, nerve impulses, and organ and system function requires energy. Energy fuels biochemical reactions and physiological functions that enable organisms to survive, thrive, and perform the many life processes. Living creatures need energy to survive.
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Describe how advances in DNA technolgy are assisting the work of those in medical fields
Answer:
Advances in DNA technology have allowed for treatments such as gene therapy in the medical field. Nowadays, there are tools like the CRIPSR-Cas9 - harnessed from bacteria's immune system- that can nip a ‘bad’ region of DNA, which is responsible for disease, and replace it with a proper functioning bit. This is how genetic disorders are going to be addressed in the near future in mainstream medical facilities.
Recombinant DNA technology is being used to create clones of transgenic organisms that produce products of significance in the medical fields. An example is incorporating the insulin gene in bacteria genome. These clones of modified bacteria colonies secrete insulin protein that is purified and injected in diabetic persons to lower their sugar level to normal.
3. The two ends of a strand of DNA are called the
A. codon and the anticodon, based on the order of the deoxyribose sugars and the phosphate groups.
B.5' and the 3' end, based on modifications in the deoxyribose sugar,
C. starting end and the ending end, based on the orientation of the DNA within the chromosome
OD. sense end and the antisense end, based on the location of the phosphate groups
Answer:
I think its B
Because its how its determine the orientation of the DNA. ? Hope this help
Explanation:
Which of the following are NOT matched correctly?
CD8+: directly destroy infected or cancerous cells
T reg cell: reduce the adaptive response once threat passes
T helper l: activate cellular branch (Cytotoxic T cells, macrophages, NK cells)
T helper 2: stimulate B cells to make antibodies
T helper (CD4+): MHC I
Answer:
T helper (CD4+): MHC I
Explanation:
T helper (CD4+) should be matched with MHC Class II while MHC Class I should be matched with T cytotoxic (CD 8+) cells. This is because T helper cells coreceptors recognize antigen presented on MHC II, to become an effector cell, while CD8+ recognize antigen presented by MHC I.