Which of the following is true of red blood cells? A. They live for only 120 days. B. They have multiple Nuclei. C. They live for only about 20 days. D. Once created in bone marrow, they circulate for our lifetime.
A. They live for only 120 days is correct. They are created in the bone marrow and destroyed in the spleen "red blood cells graveyard"
B. They have multiple Nuclei. Red blood cells don't have a nucleus but some can present structures called Jolly's bodies that are small pieces of the nucleus that they lost in the differentiation process
C. They only live for only about 20 days. No, red blood cells live for about 120 days
D. Once created in bone marrow, they circulate for our lifetime. Again, they have a limited lifetime
In 2010, a new type of life form was found in California's Lake Mono. The microbe found has a variation in the structure of its DNA. DNA usually consists of nitrogen bases, sugars, and phosphates. However, this newly-discovered microbe uses arsenic if phosphorus is not available. This fact might lead to the discovery of
Answer:
Life in non earth-like environments
Explanation:
ASAP/WILL GIVE BRAINLIEST Name at least three short-term effects and three long-term effects of the deforestation in Borneo due to palm oil plantations. please write in your own words, otherwise state sources :)
Answer:
Short Term Effects of Deforestation:
- soil erosion
- flooding
- fewer crops
- destroyed animal habitats
Long Term Effects of Deforestation:
- climate change
- increased greenhouse gases in the atmosphere
- a number of problems for indigenous people
- desertification
Sorry I don't really know that much about Borneo deforestation but I hope this helps! :)
VERY VERY EASY QUESTION. WILL MARK BRAINLIEST
A marine biologist explains that salmon populations change over time because of differential reproduction. What is "differential reproduction"?
Some organisms in a population lay eggs, while others produce sperm.
Some organisms in a population produce more male offspring than others.
Some organisms in a population produce more offspring than others.
Some organisms in a population reproduce in rivers, while others stay in the ocean.
Differential reproduction means that some organisms in a population produce more offspring than others.
Differential reproduction refers to the difference between individuals in a population and how many offspring they are able to leave.The best adapted organisms to a given environment will leave more offspring than those who are not well adapted. Differential reproduction depends on the natural
Answer:
D
Explanation:
which of the following segments of the growth curve would starvation proteins be at their highest detectable levels?
In order for a dead organisms remains to become fossilized certain conditions must be met. summarize three of these conditions.
The vast majority of deceased organisms vanish without a trace, so fossilization is a rare process.
What are the conditions that favor fossilization:Hardbody parts (bones, teeth, shells) will fossilize; soft body parts will not but may leave traces (e.g. imprints)Remains preserved (protection against scavenging, erosion, and environmental damage)There is a lot of pressure to get the remains mineralized (i.e. turn hard body parts into fossilized rocks)Anoxic (low oxygen) conditions are used to protect against oxygen damage and to prevent saprotroph decomposition.Thus, we can conclude that hardbody parts remain preserved, and high pressure and anoxic conditions are required during fossilized.
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. An experiment studies the effects of an experimental drug on the number of offspring a mother mouse has. 10 female mice are given the drug and then impregnated. The number of mice in their litters is compared to the litters of mice that did not take the drug. Based on the data, what would you conclude about the drug, explain if it worked or not and give your reasoning.?
Answer:
I don't know the data but you can infer the drug/nondrugged mice had a bigger/smaller litter based on the numbers from the data
Explanation: you would have to include the data so we can give you the answer.
Live Fund are selling their holdings at $5,000 per
share. How much would Live Fund receive if they sold
half their holdings in Marks Brothers?
$2.48 million
$4.68 million
$6.8 million
O $42.6 million
$46.8 million
Answer:
$46,8 million like it. please
Which of the following statements describes ways cellulose and starch are similar to and different from each other?
A wet-mount slide of red onion cells is studied using a compound light microscope.
Which is the proper order for blood traveling through the systemic circuit? venae cavae Right arrow. arteries Right arrow. venules Right arrow. capillaries Right arrow. arterioles Right arrow. veins Right arrow. aorta venae cavae Right arrow. arteries Right arrow. arterioles Right arrow. capillaries Right arrow. venules Right arrow. veins Right arrow. aorta aorta Right arrow. arterioles Right arrow. arteries Right arrow. capillaries Right arrow. veins Right arrow. venules Right arrow. venae cavae aorta Right arrow. arteries Right arrow. arterioles Right arrow. capillaries Right arrow. venules Right arrow. veins Right arrow. venae cavae
Answer: its the second option
Which of these organic molecules function as catalysts for chemical
reactions in living organisms?
A. Enzymes
B. Monosaccharides
C. Amino acids
D. Fatty acids
Answer:
enzymes
Explanation:
Enzymes are a type of protein that speed up chemical reactions. They are known as "biological catalysts." For example, your stomach would not be able to break down food if it did not have special enzymes to speed up the rate of digestion.
The answer is A. enzymes
Hyponatremia is a condition in which the sodium in the blood is too low. Uncontrolled spasms, which are sudden, involuntary contractions of muscles, are among the symptoms of hyponatremia. Why do they occur?
A.
Sodium is needed to generate an action potential.
B.
Sodium makes up most of the myelin sheath.
C.
Sodium is the signaling molecule that transmits impulses across a synapse.
D.
Sodium controls voluntary movement, and potassium controls involuntary movement.
Reset Next
Answer:
Option A. Sodium is needed to generate an action potential.
Explanation:
Action potentials are generated by the special types of the voltage-gated channels which are embedded in the plasma membrane of the cell.
These channels are shut when the membrane potential is near zero and the voltage-gated channels open only when the membrane potential is more than the threshold voltage.
When the channels are open then they allow the flow of sodium ions which ultimately changes the electrochemical gradient which rises the membrane potential. This rise in membrane potential generates the action potential.
What does a restriction enzyme create that allows a gene to bond to a plasmid?
what is the out group of this cladogram
Answer:ur answer is protozoa
Explanation:
In cladistics or phylogenetics, an outgroup is a more distantly related group of organisms that serves as a reference group when determining the evolutionary relationships of the ingroup, the set of organisms under study, and is distinct from sociological outgroups.
The out group in this cladogram is protozoa that is distantly related to the other organism s in the given cladogram.
The out group is a creature that is only distantly connected to the other creatures on the cladogram. The out group, which is commonly assumed to represent the ancestral situation from which the organisms in the cladogram later evolved, contributes to the tree's roots.
The organisms in the in-group are connected to one another. The cladogram is founded on the introduction of a distantly related creature known as the out group. The out group is frequently represented by a single branch on the cladogram.
Out group is an evolutionary phrase that refers to a taxon or lineage that is not part of the taxon group being examined.
Thus, the out group in this cladogram is protozoa.
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7. Ecological relationship in which two or more organisms depend on the same
limited resource.
a symbiosis
b. predator
c prey
d competition
Answer: symbiosis
Explanation:
Intimate association of organisms of different species to mutually benefit in their vital development.
Answer:D
ExplanationFor limited resources , always compitition occurs between species
How would Earth most likely change if the amount of greenhouse gasses continued to increase?
A Glacier size would increase.
B Air pollution would decrease.
C Global temperatures would increase.
D) Ocean levels would decrease.
Answer:
C. Global temperatures would increase
Explanation:
greenhouse gases affect temperature, so, it would be C.
Have a great day
The diagram below shows the first four steps of meiosis. What is happening
in the step labeled A?
Meiosis I
88
B
С
O A. Spindle fibers are moving the chromosomes to the center of the
cell.
O B. Mitotic spindles and spindle fibers are forming
O C. Spindle fibers are pulling the tetrads apart.
O D. The chromosomes are copied and form tetrads.
Answer:
B. Mitotic spindles and spindle fibers are forming
Explanation:
*PLEASE ANSWER TY* Which gas makes up the majority of air pollutants? a.) sulfuric acid b.) sodium hydroxide c.) carbon monoxide
Answer:
carbon monoxide
Explanation:
sulfuric acid is litterally acid
sodium hydroxide..... common now
Carbon monoxide (c.) is the gas that makes up the majority of air pollutants.
What is carbon mono oxide?
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is produced by the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, coal, and wood. It is a highly toxic gas and can be harmful to both humans and animals.
When inhaled, carbon monoxide enters the bloodstream and binds to hemoglobin, the molecule responsible for carrying oxygen to body tissues. This binding affinity is much stronger than that of oxygen, resulting in reduced oxygen delivery to organs and tissues. As a result, exposure to high levels of carbon monoxide can lead to symptoms such as headache, dizziness, nausea, confusion, and in severe cases, loss of consciousness and death.
Carbon monoxide is a significant air pollutant, often found in areas with heavy traffic, industrial emissions, and improper ventilation. It is important to have proper ventilation systems and to use carbon monoxide detectors to minimize the risk of exposure to this dangerous gas.
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Evaluate whether or not fish farming would have a negative impact on human health
Answer:
Fish can’t be super close together or they will break out in disease and when you give some sort of antibiotics in there it spreads into the soil.
The oldest known fossils Group of answer choices all of the choices. are microscopic. are that of prokaryotes. date back 2.5 billion years ago.
Answer:
Cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old. Cyanobacteria are among the easiest microfossils to recognize
Explanation:
Carbohydrates are made of which monomers
Answer: Describe the monosaccharides. Monosaccharides are the monomers of carbohydrates and are often referred to as “the simple sugars”.
Explanation: You can often recognize a carbohydrate by its suffix – ose (e.g. glucose, sucrose, cellulose, etc.)
The esophagus, a tube that carries food to the stomach, is constantly being scraped as food travels through it. Why does the esophagus not deteriorate through a person’s lifetime? Cells can anabolize the food prior to entering the esophagus. Cells are constantly dividing and replacing old or damaged cells. Cells promote a fluid to build up along the esophagus to reduce friction. Cells build a type of protein called enzymes that act as an armor.
Cells are constantly dividing and replacing old or damaged cells.
how is nitrogen returned to the atmosphere during the nitrogen cycle
How are the alleles for sex-linked traits inherited
which of the following populations receives energy from population at each level of the energy pyramid
A) Boreal owl
B) Mushroom
C) Red squirrel
D) Engelmann spruce
Answer:
mushroom
Explanation:
its a decomposer i think i learned this last year
Easy Question. Will mark brainliest.
Considering the impacts and benefits of bioprospecting, which of the following describes the most likely impact?
It could be harmful to the ecosystem.
It may make additional types of medical treatments available.
It is more expensive than creating synthetic compounds.
It provides additional variety of known chemical compounds.
Which of the following strategies are used in biotechnology to solve a problem?
I. Genetic engineering
II. Biomimicry
III. Biochemical engineering
I only
II only
I and II only
I, II, and III
Which of these statements expresses a scientific theory?
A. The leaves of all plants consist of several kinds of cells.
B. Cells that lack a nucleus are usually smaller than cells with a
nucleus.
C. An unidentified material that consists of cells must be from a
living organism
D. The cell is the basic structural and functional unit of living
organisms
Answer:
The correct answer is C.
Explanation:
An unidentified material that consists of cells must be from a
living organism.
It sounds more like an theory.
I-O
ІІІІІІІІІ
с-с-с-с-с-с-с-с-с-с-н
What type of molecule is represented by the model below?
н нннннннн
IIIIIIII
с-с-с-с-с-с-с-с-с-с-Н
Н-С-0
| | | | | ІІ | |
н нннннннн
н нннннннн
-с-с-с-с-с-с-с-с-с-Н
нсо
1 т т т т т т т 1
н ннннн Hнн
н ннннн
о
-с-с-с
Os
Hнн
н-с-О
| | | | |
н нннн
11
Hн
н
O Carbohydrate
Steroid
O Fat
Nucleic acid
Answer:
Carboydrate
Explanation:
I'm confused with what's going on in the words, but I see a lot of C, H, O, and more. So I'm guessing it's talking about carbohydrates. Don't get mad though it's just the words didn't make sense to me.
Short-spined sea urchin fossils were found directly above long-spined sea urchin fossils in a layer of rock. What do the differences between the two sets of sea urchin fossils suggest about them?
The longer spines developed as the shorter-spined sea urchins grew older.
The longer-spined sea urchins existed before the shorter-spined sea urchins.
The shorter-spined sea urchins stretched their spines to ward off predators.
The shorter spines did not protect the sea urchins well enough and they died off.
Answer:
The longer-spined sea urchins existed before the shorter-spined sea urchins
Explanation:
The lower buried is what died off first and the recently buried is the newly evolved version.
Answer: it shall be opion b
Explanation: