The primary reason living organisms cannot produce an unlimited number of offspring is senescence, otherwise known as old age.
Cells of the reproductive organs divide and continually make it possible for organisms to reproduce. As time goes on, the old cell dies and new cells replace them through mitotic or meiotic cell division of young cells that still has the ability to divide.
However, as programmed cell deaths occur with old age, the reproductive cells start losing the ability to divide, and when this happens, the ability for organisms to reproduce becomes limited.
More on reproduction can be found here: https://brainly.com/question/7464705
g Describe the structure of Hemoglobin. Does the binding of oxygen involve the direct interaction with the polypeptide chain
Answer:
Hemoglobin is an iron-containing protein present in the blood that functions for transportation of oxygen to different body cells..
Each hemoglobin molecule have tetrahedral structure consist of four heme groups surrounded by a globin group. Heme, is composed of porphyrin (ringlike organic structure) which is attched to an iron atom. There are four iron atoms in each molecule of hemoglobin that binds with four oxygen atoms and globin carry two linked pair of polypeptide chain.
The oxygen reversibly binds with the polypeptide chain and the process called oxygenation.
5) The troposphere of the Earth's atmosphere supports life because it contains
A. Water, oxygen, carbon dioxide, other greenhouse gases
B. Water, nitrogen, helium, and argon
C. Water, oxygen, carbon monoxide, methane
D. Water, nitrogen, oxygen, carbon monoxide
Answer:
I think its A
Explanation:
Because the reason why airplane have closed windows is because we can't breathe in carbon dioxide when we go up. Of course there is oxygen just not a lot as we go up. Why would there be helium in the air? We would sound weird when we skydive.
what is the most important responsibility of individual in creating a safe environment especially on public health.
Answer:deacreaing pollution on the behalf of own is the best soon of it...
Explanation:
HELPPPP (25 points)
Identify this
Eye color is an example of (20 Points)
translational control.
gene regulation.
transcriptional control.
gene expression.
eye color is an example of Gene expression
What are the two defining characteristics found in organisms that are grouped in the clade Lophotrochozoa
Answer:
A protostome creatures’ clade categorized within the Spiralia is known as Lophotrochozoa. Based on the molecular proof, the taxon was recognized as a monophyletic group. The two illustrating features of lophotrochozoans found in various members are the presence of a small, translucent top-shaped ciliated larvae or trochophores, and the existence of a horseshoe-shaped ciliated tentacles crown known as iophophores.
For a species with four pairs of chromosomes, ________ gametic combinations are possible.Group of answer choices
Answer:
16
Explanation:
For a species with four pairs of chromosomes, 16 gametic combinations are possible.
This is calculated by using the formula 2n
A normal human has two pairs of chromosome which calculated by 2*2=4 to give the possible gametic combinations. However in the case of 4 pairs of chromosomes it is calculated by 2*2*2*2= 16 possible genetic combinations.
Which particles do plants absorb to obtain energy
Answer:The molecules of chlorophyll contained in the chloroplasts absorb energy in the form of light from the sun. Some plants need more sunlight than others, but all need at least a little. Instead of taking in oxygen and breathing out carbon dioxide like animals do, plants take in carbon dioxide from the atmosphere......thank you.have a great day
Create a sentence explaining how animo acids from proteins
Amino acids are joined together by peptide bonds, in which the amino or NH2 of one amino acid bonds to the carboxyl (acid) or COOH group of another amino acid to form Proteins.
Amino acids are monomers that combine to form polymers called proteins.
Bacterial infections have become much more of a threat to human health due to which of the following?
A. an increase in acquired antibiotic resistance by innocuous strains
B. horizontal transfer of pathogenicity
C. an increased use of antibiotics, horizontal transfer of pathogenicity, and an increase in acquired antibiotic resistance by innocuous strains the increased use of antibiotics
D. an increased use of antibiotics coupled with an increase in acquired antibiotic resistance by innocuous strains
Answer:
C
Explanation:
Infections caused by bacteria have become much more of a threat to human health due to increased use of antibiotics, horizontal transfer of pathogenicity, and an increase in acquired antibiotic resistance by innocuous strains due to the increased use of antibiotics.
Increased and unregulated use of antibiotics has led to the development of antibiotic resistance by different bacterial strains as a result of evolution by natural selection. The unregulated use of antibiotic act as a selection pressure on the bacterial population. Those that are naturally able to withstand the presence of antibiotics are selected for and the weak individuals gradually fade off from the population, leaving the strong, antibiotic-resistant ones behind.
The potential of bacterial strains to also transfer transposable genetic elements horizontally from one individual to another could make bacteria that are non-virulent before to become virulent.
Correct option: C.
_______ are the small sacs that are the site of gas exchange in the lungs. In addition to being an airway, the _______ is the location of the human vocal cords. Cilia in cells along the trachea and nasal passages secrete _______ which traps dirt and particles from the air. Air is only approximately 21% oxygen. The majority of air is ______. The medulla oblongata controls the contraction and relaxation of the _______, causing the lungs to inflate and deflate during breathing. Explain the process of breathing. Begin with inhalation and describe the route that the air takes to the lungs, and what happens when the air reaches the lungs. Include in your description the terms: mouth, nose, pharynx, larynx, trachea, bronchi, lungs, alveoli, carbon dioxide, oxygen, and capillaries
1. D
2. C
3. B
4. A
5. Alveoli
6. larynx
7. mucus
8. nitrogen
9. diaphragm
10. Air enters the body through the mouth or nose and passes through the pharynx and larynx. Then it travels down the trachea and branches through the bronchi into the two lungs. In the lungs, small alveoli are the site of gas exchange where carbon dioxide diffuses into the lungs for exhalation, while oxygen from the air diffuses into the capillaries surrounding the alveoli to be pumped throughout the body.
PENNFOSTER.
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Answer:
1. d
2. c
3. b
4. a
5. Alveoli
6. larynx
7. mucus
8. nitrogen
9. diaphragm
10. Air enters the body through the mouth or nose and passes through the pharynx and larynx. Then it travels down the trachea and branches through the bronchi into the two lungs. In the lungs, small alveoli are the site of gas exchange where carbon dioxide diffuses into the lungs for exhalation, while oxygen from the air diffuses into the capillaries surrounding the alveoli to be pumped throughout the body.
Explanation:
Which of the following is the MOST complex?\
A.Eukaryotic Cell
B.Prokaryotic Cell
C.Ebola
D.Virus
Answer: Hi!
Your answer would be a), eukaryotic cells. We should automatically know that prokaryotic cells are less complex than eukaryotic cells. However, the last two options, Ebola and Virus, are both viruses. Viruses are not considered living and they don't really do anything besides replicate, which they need living cells to do. On the other hand, Eukaryotic cells have organelles, a nucleus, etc. They are definitely classified as living, and complex!
Hope this helps!
The most complex cell is eukaryotic cells. Therefore, option (A) is correct.
What is a eukaryotic cells?Organelles that are membrane-bound and found in eukaryotic cells include the nucleus, mitochondria, and endoplasmic reticulum. Protozoa, fungi, plants, and animals are examples of eukaryotic cell-based organisms. The biological domain Eukaryota is where these species are categorised. Eukaryotic cells are bigger and more sophisticated.
Organelles found in eukaryotic cells conduct a range of tasks inside the cell (described in detail, below). The cytoskeleton, which is also important in relaying signals from one area of the cell to another, stabilises and physically supports each organelle. Microtubules, microfilaments, and intermediate filaments make up the majority of the cytoskeleton in eukaryotic cells. Cytosol is the name given to the liquid that covers every cell organelle.
Learn more about eukaryotic cells, here:
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what tools should a scientist use to measure grams
Explanation:
you can use a scale or a balance
Answer:
Balance/scale
Explanation:
What does absorption mean? A. breakdown of molecules B. enzyme activity on nutrients C. network of chemical reactions that occur in the body D. process of assimilating
Answer:
It is B
Explanation:
Because absorption occurs when the simple nutrient molecules that result from digestion are absorbed into blood or lymph.
Answer:
process of assimilating
Explanation:
I think it is right! I don't know.
What is NOT a function of the endocrine system? Select one: a. Production of white blood cells b. Influencing fluid absorption c. Assisting with sperm production d. Influencing body’s energy level and metabolism
Answer:
Option a. Production of white blood cells
Explanation:
The endocrine system is the system that involves the organs and glands that produce and secretes the hormones that acts on various other activity to regulate responses or activity.
Major function and examples of endocrine system are :
Aldosterone helps in fluid absorption in kidney
Thyroxine helps in regulating body metabolism and energy
Testosterone is responsible for sperm production is regulated
But, WBC formation is not regulated by hormones.
Thus, the correct answer is: option a. Production of white blood cells
to test a hypothesis, a scientist could...
a- make observations
b- perform experiments
c- look to the scientific literature to find data
d- all of the above
Answer:
see below
Explanation:
without doubt it is D
Answer:
may be right ans is d
Explanation:
all of above I think because to text hypothesis,a scientist could do all above
"When the body is relying on internal energy reserves to continue meeting its energy demands, it is in the ________ state."
Answer:
Postabsorptive state
Explanation:
This is the state where food has been digested, absorbed, and stored. While in this state, the body relies on the stored glycogen in the body. This state is also known as the "fasting state."
Which factor in the Southwestern desert ecosystem is abiotic?
What does it mean for an environment to be isotonic?(1 point)What does it mean for an environment to be isotonic?(1 point) The concentration of solute in the environment is different from the concentration inside the cell. The concentration of solute in the environment is equal to the concentration inside the cell. The concentration of solute is greater in the environment than inside the cell. The concentration of solute is greater inside the cell than in the environment.
Answer:
The correct answer is : The concentration of solute in the environment is equal to the concentration inside the cell.
Explanation:
Isotonic environment is an environment the amount of solute concentration is equal on both side of the semipermeable membrane or the cell. in such condition there would be no water movement towards particular direction or will take place and as there is no water movement so there would be no change in shape or size of the cell. The osmotic pressure in an isotonic environment would be same on both side of the membrane.
Thus, the correct answer is : The concentration of solute in the environment is equal to the concentration inside the cell.
"The beaks of the Galapagos finches that Darwin observed evolved into multiple shapes, and each is adapted for what?"
Answer:
Finch beaks were differentiated according to the different foods that each particular finch fed on.
Each finch developed in different zones and climax of the Galapagos island, that is why they were conditioned by the environment in which they lived, each particular environment made these finches adapt and evolve to be able to fulfill their life and not with extinction of the species.
This speaks of the evolution of species, how it adapted to environmental changes to survive, and how the fittest survive in the face of adversity.
Explanation:
Animals can have genetic modifications, which if they are inherited through generations and are optimal for the species is considered evolutionary processes of the species, beneficial for its survival.
Genetic changes are stimulated by environmental changes, and expressed with phenotypes, that is, with physical characteristics or qualities such as the different morphologies of finch beaks.
Each finch feeds on different sources, that is why those that eat hard insects will have more resistant beaks, those that have to remove the insect from the trees have more pointed beaks, those that grind seeds or fruits from the ground have more robust beaks and in the form of a "hook" for the possible crushing of the husk of the seed.
The diagram shows a type of lipid.
Which type of lipid is shown?
A.) a saturated phospholipid
B.) a saturated triglyceride
C.) an unsaturated phospholipid
D.)an unsaturated triglyceride
Answer:B
Explanation:
In the ATP Cycle energy is transferred from sunlight or glucose to build _____ from ADP and _____________.
Answer:
1. ATP
2. Inorganic phosphate (Pi)
Explanation:
Adenosine triphosphate (ATP) is the usable form of energy by the cells of living organisms. During the light reaction of photosynthesis, energy from sunlight (solar energy) is converted to ATP in order to power the Calvin cycle stage. Also during cellular respiration, energy stored in glucose molecule is transferred to ATP.
The processes by which this synthesis of ATP from ADP (Adenosine diphosphate) occurs is called oxidative phosphorylation and chemiosmosis. Energy is stored in the ATP molecule when ADP combines with inorganic phosphate (Pi).
This long muscle lies obliquely across the anterior thigh.It allows you to sit in a crossed-leg (lotus)position.It flexes the leg at the knee and abducts and laterally rotates the thigh at the hip.
A) Hamstrings
B) Quadriceps femoris
C) Sartorius
D) Gastrocnemius
Answer: it's C
Explanation:
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. The name Sartorius comes from the Latin word sartor, meaning tailor, and it is sometimes called the tailor's muscle.
If you have a density of 100 kg/L, and a mass of 1000 units, tell me the following:
First what are the mass units?
Answer:
100KL
reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
density = mass/volume = 100 kg/L
the mass = 1000 kg
volume = mass/density = 1000/100 = 10 L
hope this helps you
2. What purpose does fat serve in the body?
Explanation:
fat give your body energy and to help cell growth and helps your body warm
Which examples are ways that models can help scientists solve problems?
Check all that apply.
A model can represent something very large.
A model can represent something very small.
A model can represent something very complex.
A model can represent something that cannot be seen or touched.
A model can represent every aspect of a complex system.
Answer:
ABCD
a model can represent every aspect of a complex system is the only wrong one.
Explanation:
One of the most crucial factors in the development of fatigue appears to be a depletion of ATP.
a. True
b. False
Answer:
Option A
True
Explanation:
Adenosine triphosphate (ATP) is the molecule in the cells that carry energy. They help to trap the energy that is obtained during respiration and the breaking down of food, in order to release it to the cells of the living organisms when the need arises.
Once the ATP levels deplete in the body, cellular fatigue begins to occur, as the cells do not have the required energy to perform their necessary functions.
This makes the correct option to be A: True. The depletion of the ATP levels in the body causes fatigue
(iii) List TWO structural differences between this polysaccharide and glycogen.
[2 marks]
Answer:
Cellulose, starch, and glycogen are all polymers of glucose, but differ in form and function because of the optical isomer involved, the length of the polymers, and the degree of branching.CELLULOSE is an unbranched, long chain glucose polymer held by ß-1,4 glycosidic bonds. The straight, tightly packed chains give cellulose high tensile strength and resistance to hydrolysis.
STARCH is a mixture of two polysaccharides: amylose (unbranched with alpha-1,4 glycosidic bonds) and amylopectin (branched with alpha-1,6 glycosidic bonds). The alpha-1,4 glycosidic bonds and more branched nature of starch account for ith physical properties; starch is powdery and more easily hydrolyzed than cellulose, which exists as tough microfibrils.
GLYCOGEN, like starch, is a branched polymer. It is similar to amylopectin, being composed of alpha-glucose molecules, but it is larger and there are more alpha-1,6 links. This makes it highly branched, more soluble, and more easily hydrolized than starch.
Please mark brainliest!
Answer:
polysaccharides have coil and long branch while glycogen has short chain.
Explanation:
polysaccharides have coil and long branch while glycogen has short chain.
Which properties of systems does a robot have? Which does it not have?
Answer:
Physical structure, movable and brain.
No feelings and no reproduction.
Explanation:
A robot have the following properties of systems such as they have a physical structure which helps them to move from place to place. They also have a sensor system which detect any change in the environment, a power supply which helps them for doing different activities and a computer brain which control all the activities. A robot does not have any feelings such as pain, happiness etc because it is a machine and inability to reproduce like humans.
Who were the scientist who discovered the plasmid PB322?
A) Rodriguez & beliver.
B) Joller smith.
C) Herbert boyer.
D) Stanley cohen & joller smith.
Answer:
c) Herbert Boyer
Explanation: