Answer:
The number of electrons in an atom's outermost valence shell governs its bonding behaviour. Elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table. ... To form a covalent bond, one electron from the halogen and one electron from another atom form a shared pair.
What is the difference between an autotroph and a heterotroph?
Answer:
Autotroph produces its own food (Plants)
Which type of energy do muscle cells use to produce mechanical energy in the movement of an arm?
Answer:
usually in association with myosin, are responsible for many types of cell movements. Myosin is the prototype of a molecular motor—a protein that converts chemical energy in the form of ATP to mechanical energy, thus generating force and movement.
Explanation:
The type of energy muscle cells use to produce mechanical energy in the movement of an arm is known as chemical energy.
Which type of energy do muscle cells use?The type of energy that muscle cells use is known as chemical energy. Adenosine triphosphate (ATP) is the energy source for all muscle contractions. Energy is released when ATP is broken into ADP+Pi (adenosine diphosphate and phosphate group).
Maintaining the availability of ATP for muscle contraction is the limiting factor since ATP is not stored in large amounts in skeletal muscle. Muscle contraction converts chemical energy to mechanical energy when ATP is hydrolyzed during cross-bridge cycling.
This mechanical energy is then distributed and stored in the tissue as the muscle deforms or is used to perform external work.
Therefore, chemical energy is the type of energy muscle cells use to produce mechanical energy in the movement of an arm.
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What helps substances cross the cell membrane during facilitated diffusion?
Choose 1 answer:
Cholesterol
B
Carbohydrates
Proteins
D
Water
Proteins help substances cross the cell membrane during facilitated diffusion. Thus option C is correct.
What are proteins?Proteins are defined as large biomolecules and macromolecules and are made up of one or more extended chains of amino acid residues.
Protein play the important role in development of human body.
Proteins assist our body with cell regeneration and repair.
There are basically eight types of proteins.
Hormonal proteinEnzymatic proteinStructural proteinDefensive proteinStorage proteinTransport proteinReceptor proteinContractile proteinThus, proteins help substances cross the cell membrane during facilitated diffusion. Thus option C is correct.
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A zebra embryo is in the early stages of development. The cells are beginning to look different from each other.
Which statement is the best description of what is happening to the zebra embryo?
Meiosis is breaking down old cells to form new ones.
Mitosis is making identical new cells from the original cells.
The cells are differentiating so that they have specialized functions
Cellular respiration is making many different types of cells.
Answer:
The cells are differentiating so that they have specialized functions
Explanation:
Answer:The cells are differentiating so that they have specialized functions
HELP ASAP PLSS
1.How can we trace the lines of descent between species?
We can trace the lines of descent between species by three methods that are comparative anatomy, comparative embryology, and molecular genetics.
What is phylogenetics?
Phylogenetics is the study of evolutionary relationships among biological entities – often species, individuals or genes (which may be referred to as taxa).
Thus, We can trace the lines of descent between species by three methods that are comparative anatomy, comparative embryology, and molecular genetics.
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Which characteristic of life deals with the most basic unit of living organisms?
a. Growth
C. development
b. Homeostasis
d. reproduction
Answer:
well i belive its growth hope that helps
scientists who believe in solar nebular theory believe that the formation of the solar system began around
Answer:
4.7 Billion years ago!
Explanation:
pls help if you know wither one of these
Answer:
sex cell and germ cells
Explanation:
HELP PLEASE ITS TIMED
Answer:
ecosystem
Explanation:
Answer:
community
Explanation:
Which element within the respiratory system is responsible for removing foreign matter from the lungs
Answer:
Cilia
Explanation:
The element which is responsible for this is the Cilia. The form found in a human's respiratory system are known as Motile Cilia and basically act as brooms on the respiratory epithelium lining the respiratory tract. Huge waves of Motile Cilia communicate with one another in order to be able to effectively clean up all dirt and mucus from the lungs in a very organized and unified manner. This helps maintain our respiratory system running as effectively as possible.
What does the environment mean?
Answer:
the surroundings or conditions in which a person, animal, or plant lives or operates
When previewing a literary text, to what features should you pay attention?
a.
titles
c.
illustrations
b.
beginnings and endings
d.
all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
A. Titles
Explanation:
Answer:
d
Explanation:
i took the test
what's the answer plsss
Answer:
I believe the answer is B.?
Explanation:
Sorry if i am wrong.
have a nice day
In _________ area cells, the checkpoint proteins are often abnormal, allowing damaged DNA to be replicated and passed to daughter cells. This is how ________ area are copied from one cell to the next. If there is a mutation in a gene that normal controls growth, then the cell will not have normal _________ area of growth. A cell with defective checkpoint proteins can result in cancer, the _________ area growth of cells with mutated DNA.
Answer:
How cells use checkpoints at the end of G1 phase, end of G2 phase, and partway Normal cells, however, move through the cell cycle in a regulated way.
Explanation:
The human heart is
A) Neurogenic heart B) Myogenic heart
C) Pulsating heart D) Ampullary heart
c
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\'Explanation:
Answer:
c
Explanation:
The organic compounds in living things are organized into groups: carbohydrates, lipids, proteins, and nucleic acids.
Which two macromolecules play a central role in Transcription and Translation?
lipids and nucleic acids
proteins and carbohydrates
carbohydrates and lipids
nucleic acids and proteins
nucleic acids and proteins
carbohydrates and lipids
is immunity a function of proteins
Answer:
Yes
Explanation:
Of the many functions of protein in your body, one of its most critical is supporting your immune system. The immune response protects you against harmful microorganisms, including viruses and bacteria, as well as foreign substances that might attack your defenses, such as a thorn or flames from a fire.
What do a bacterium and a whale have in common?
Answer:
The correct answer is - characteristics of life.
Explanation:
All the living organisms present on earth share some basic characteristics known as characteristics of life and basic traits. Everything with life has these traits from the smallest bacterium to the largest whale, share certain characteristics of life. Without these characteristics, there is no life.
These characteristic are -
1. Reproduce their selves - very living thing increase their number
2. Grow and develop - growth and development is common in every organism.
3. Homeostasis - ability to maintain the body at equilibrium
4. Consist of cell - organisms are made up of one or more cells.
5. Complex chemistry - every organism have complex chemistry in their body system.
6. Response to the environment - each and every organism respond according to the chage.
An offshore oil platform houses a drill for drilling oil. The drill descends from the platform and enters the ocean. At the bottom of the ocean, the
drill starts to dig into the rock. It continues drilling into the rock for another 7,000 feet and then stops. Where does the drill stop?
in the biosphere
in the geosphere
in the atmosphere
in the hydrosphere
Answer:
in the geosphere
Explanation:
The drill will eventually stop within the geosphere.
The biosphere is the region of the earth populated by living organisms. The geosphere is the region of the earth made up of solid rock The atmosphere is the gaseous part of the earth. The hydrosphere is the liquid part of the earth or where water dominates the earth.The drill pierces through the geosphere as it initially passes through the hydrosphere. Eventually, the drill stops within the geosphere.
Answer:
geo
Explanation:
got it right
Vitamin B and folic acid deficiencies are characterized by production of abnormally large erythrocytes called
Answer:
Megaloblasts
Explanation:
Megaloblasts are nucleated red cells that are formed as a result of these three factors.
1. Deficiency in diet of vitamin b12 or folic acid
2. Bad absorption of vitamin b12 or folic acid
3. When there is increase in the demand for vitamin b12 or folic acid.
Megaloblasts are large erythroblasts that comes up in the blood especially in a case of pernicious anaemia.
Someone pls helppppp
GUYS HELP!!!
Pleiotropy is a tough word, not going to lie. It really just means that one gene can control several different traits. Marfan syndrome is an example of a genetic disorder where the presence of one gene causes many different traits to appear. Some evidence suggests that President Abraham Lincoln could have had Marfan's, but the absolute best example (in my opinion) is Peter Mayhew (the original actor that played Chewbacca!) who was over 7 feet tall! What are some (list at least 3) of the phenotypic traits for an individual who has the Marfan genotype?
Answer:
a single genetic disorder that can produce several symptoms ... Marfan syndrome. Genetic heterogeneity is. when the same phenotype may result from the actions of different genes ... An example of a condition that exhibits genetic heterogeneity is ... Polygenic means. the traits are determined by more than one gene.
Explanation:
What does your brain stem control?
A) Heart rate and breathing
B) All functions of the body
C) Reflexes
Answer:
A) Heart rate and breathing
which renewable energy resource is directly impacted by air quality?
Answer:
Wind power
Explanation:
could have an almost immediate impact on air quality by halting the production of these particles.
HELPPPP!!!! ASAPPPPP!!!
14.
Which of these correctly relates the photoreceptor to the region of the brain to which it connects?
Photoreceptor connects to visual region.
Photoreceptor connects to gustatory region.
Chemoreceptor connects to visual region.
Chemoreceptor connects to somatosensory region.
Which of these correctly relates the photoreceptor to the region of the brain to which it connects? Photoreceptor connects to visual region
What is photoreceptor ?Photoreceptors can be defined as cells for detecting light. They are composed of the outer nuclear layer that contains the cell nuclei the inner segment that houses the cell machinery and the outer segment that contains photo-sensitive pigment.
Therefore photoreceptors are the only cells that can convert incoming light into an electrical signal that can be carried to the brain via the optic nerve to create conscious vision.
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How can clothes impact someone’s performance?..i need three facts for an essay
Answer:
Clothes too tight can restrict someone's movement Clothes too baggy could possibly trip someone up, which could lead to broken bones/concussionsClothes could get in someone's way while they are trying to preform or do a certain task that could result in an injury.Answer:
Clothes can impact someone's performance by
Causing them to be cold or hot and experience symptoms.
Slow them down if they are exercising because of the material.
The clothes might get damaged causing the person to have to stop whatever they are doing to assess the situation.
Explanation:
I am a human. Therefore, I have wore clothes.
Genetics is the branch of biology that involves the study of how different traits are transmitted from one generation to the next.
O True
O False
If a woman has brown eyes with the recessive allele for blue eyes (Bb), each of her sex cells will have
OA.
the allele for blue eyes, b.
ОВ.
the allele for brown eyes, B.
OC.
one allele or the other, B or b.
OD.
the same allele she does, Bb.
Answer:
c
Explanation:
Answer:
b. They would have the allele for brown eyes
Explanation:
the capital B means that it is the dominant letter.
WHY DOES WATER HAVE A HIGH SPECIFIC HEAT? WHAT IS THE SPECIFIC HEAT OF WATER?
Answer:
Depends on the temperature of it's surroundings.
Explanation:
Answer:
There are two reasons. One of them is that the water molecule is “bent”. It is rotationally asymmetric, meaning that it can “store” more energy in the rotational degrees of freedom than other, symmetric molecules (like diatomic molecules, or CO 2 for example).
The other and more important reason are the hydrogen bonds. When a hydrogen atoms binds with a more electronegative atom (such as oxygen in the case of water), its electron has a higher probability to be found in the vicinity of the oxygen atom, leaving the hydrogen nucleus partly “exposed”. This partial charge on the hydrogen will create a very weak bond with the partly negatively charged oxygen atom of a neighbouring water molecule (remember, the hydrogens’ electrons prefer to be around the oxygen atom instead, making it a bit negatively charged). This electrostatic interaction, or bond, between neighbouring water molecules is the famous hydrogen bond.
Even though each hydrogen bond by itself is weak compared to the bonds in the molecules themselves, there are many neighbours around each water molecule, which means that water can store a significant amount of energy in these bonds. As you add heat to water, instead of speeding up the molecules (increasing their kinetic energy and thus temperature) the hydrogen bonds get broken up, soaking in the additional heat without much change in temperature.
Explanation:
10 examples of unwanted friction that can be lowered
Answer:
List three ways of reducing friction. 1.Polishing the rough surface. 2.Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and 3.allow smooth movement as rolling friction is less than sliding friction.