DNA is a molecule made up of thousands of atoms and is very long and thin. It is made up of two twisted chains or "backbones." A double helix is the term for this structure. It would appear like a ladder if you could straighten a DNA molecule out. The ladder's "rungs" are built up of two smaller molecules called bases.
adenine (A) and thymine (T) join together = A-T
guanine (G) and cytosine (C) join together = G–C
DNA is a molecule with a double helix structure. This means that it is shaped like a twisted ladder. The backbone of the molecule is made up of two long chains that spiral around each other. The struts of the ladder are base pairs, which are made up of two bases joined together.
There are four bases: adenine (A), cytosine (C), guanine (G) and thymine (T). These can only join together to form two possible base pairs: adenine–thymine or cytosine–guanine.
Classify each object below as living or nonliving. Explain youranswer for each.
Explanation:
A=non-living because it doesn't perform metabolic activities
B=Living because it does metabolic activities
C= Living because it make food for it self
D= It is non-living because it doesn't perform metabolic activities
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Answers
All living things breathe, eat, grow, move, reproduce and have senses. Non-living things do not eat, grow, breathe, move and reproduce. They do not have senses.
Car:-non living
Octopus:-Living
C:-______
Fire :-Non living
the organelle that sort and ship the proteins produced in the cell may stop this organelle was namd after an Italian physician
Answer:
The Golgi
Explanation:
How many reactions needing light occur during photosynthesis?
Answer:
Explanation:
The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
Explanation:
Two lights needed during photosynthesis
Is it help ful
If an observers latitude is 35N, the altitude of Polaris is what?
if an observers latitude is 35N then the answer i dont know
Which organism exhibits behavioral adaptation?
- an owl with large pupils and eyes that enable it to see better at night.
- A possum playing dead to increase its chances of survival.
- An insect that mimics it’s environment to hide from its predators.
- A desert plant that sheds its leaves to lessen water loss during the dry season.
Answer:
B
Explanation:
a possum playing dead to increase its chances of survival
All of the options provided involve some form of adaptation, but the one that specifically involves behavior is the possum playing dead to increase its chances of survival. Hence option B is correct.
What is Behavioral adaptation?Behavioral adaptation refers to changes in an organism's behavior that help it to better survive and thrive in its environment. Playing dead, or "playing possum," is a behavioral adaptation that some animals, including possums, use when they feel threatened.
By playing dead, the possum is essentially trying to fool its predator into thinking that it is no longer a threat or a viable prey item. This behavior can increase the possum's chances of survival by deterring predators and allowing it to escape unharmed.
Other examples of behavioral adaptation include migration, hibernation, and communication between members of the same species. These behaviors can help organisms conserve energy, avoid harsh environmental conditions, and increase their chances of finding a mate or resources for survival.
Hence option B, A possum playing dead to increase its chances of survival is correct.
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What part of the brain controls artistic and mathematical abilities? A. Cerebrum B. Cerebellum C. Brain stem
The brain has main functions but the part of the brain that controls artistic and mathematical abilities is the Cerebrum's
What is the function of the Cerebrum?Generally, the Cerebrum resides in the left hemisphere which is in charge of controlling speech, arithmetic, and writing.
In conclusion, The Cerebrum's the largest part of the brain, the cerebrum's main function is to create and harmonize motion, some other functions of the cerebrum are to facilitate speech reasoning, feelings, and understanding.
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What are convection currents
Answer:
Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock.
Explanation:
Why does increased biodiversity result in a more sustainable ecosystem
Answer:
there is a greater variety of genes and species in that ecosystem
what is cat litter made of
How can a hormone that is present in very small quantities within the bloodstream elicit such a large response within a cell?.
Answer:
-Cells degrade the hormone into many tiny molecules, and then each piece creates a response within the cell.
Explanation:
Kangaroos conserve energy as they move __________.
A)
by using their front paws to help them run
B)
by using a tailwind to push them forward
C)
by using their hind legs like springs
D)
by running only at night
C
The spring-like tendons in their hind legs store energy for leaps, kangaroos use less energy hopping than a horse use in running. Kangaroos tend to move in a leisurely fashion using all four feet plus its hefty tail for balance.
Answer:
Letter C, by using their hind legs like springs
Explanation:
Got it right on edge :)
Several models of atoms are mentioned in this lesson. Plum pudding, planetary and quantum mechanical. Which reason below explains why there are different atom models?
Because atoms have changed their structure over time
Because there are different types of atoms
Because the ideas about the models changed as more discoveries were made about the atom
Because many people came up with models at the same time
Answer:
Because the ideas about the models changed as more discoveries were made about the atom
Explanation:
The structure of the atom was not always known and it took many discoveries to fully figure it out. Through these discoveries, many models were proven invalid; though they still helped in the long run by providing a basic idea on the basis of an atom.
Remember, models are able to change over time, they are merely theories after all; and scientific theories change, unlike laws.
1) The chart indicates the digestion and nutrient absorption for two different species of animals.
Which of these describes the interaction between the food intake and nutrient absorption for these two different species?
A) Carnivores have a more efficient intestinal absorption since meat is higher in caloric value.
B) Carnivores have more digestive organs over which food digestion and nutrient absorption can occur.
Herbivores require a shorter digestion time with a higher amount of nutrient absorption into the bloodstream.
D) Herbivores have a greater intestinal length that allows for increased absorption of nutrients from a plant-based diet.
Herbivores having a greater intestinal length that allows for increased absorption of nutrients from a plant-based diet best describes the chart.
What are Herbivores?These are organisms which feed on plants and are referred to as primary consumers.
They possess four stomachs and a greater intestinal length that allows for increased absorption of nutrients from plant diet which contains polysaccharides such as cellulose.
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Apply your understanding of how living organisms use energy to argue in favor of why it is either beneficial or detrimental for cells to use ATP rather than directly using the energy stored in the bonds of carbohydrates to power cellular reactions.
a. ATP is readily available in the form of a single unit that provides a consistent, appropriate amount of energy. If cells harvested energy from various carbohydrate compounds, they would need to tailor each reaction to each energy source.
b. ATP energy cannot activate the ROS dependent stress response whereas food molecules are responsible for activating ROS.
c. ATP is low in energy, but food molecules (in the form of carbohydrates) possess higher levels of energy that cells can use.
d. ATP is readily available to cells, unlike the carbohydrate compounds that have to first be phosphorylated in order to release their energy.
Answer:
ATP is readily available in the form of a single unit that provides a consistent, appropriate amount of energy. The cell would need to tailor each reaction to each energy source if it harvested energy from different compounds.
Explanation:
Select the statement that is true.
1.) Sexual reproduction requires a single parent.
2.)Asexual reproduction is a simpler process than sexual reproduction
3.) Asexual reproduction occurs when two gametes fuse.
4.)Sexual reproduction produces more o
offspring than asexual reproduction.
Answer:
2) Asexual reproduction is a simpler process than sexual reproduction.
Asexual reproduction is a simpler process than sexual reproduction is a true statement.
What is Asexual reproduction?Asexual reproduction refers to a form of reproduction that excludes the joining of gametes or sex cells. Asexual reproduction does not require the mating of male and female gametes, as sexual reproduction does, in order to produce children.
The creature may reproduce even in the absence of a mate, producing young that are typically clones of their parents. Binary fission, budding, vegetative reproduction, spore formation (sporogenesis), fragmentation, parthenogenesis, and apomixis are the several asexual reproduction processes.
Asexual reproduction is a process used by bacteria, archaea, many plants, fungi, and certain mammals.
Therefore, Asexual reproduction is a simpler process than sexual reproduction is a true statement.
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How do scientist prevent bias from affecting their conclusions?
Scientists keep their personal opinions and preferences separate from determining the conclusion.
Scientists will ask other scientists for their opinion.
Scientists will ask their family members for their own opinions.
Answer:
Scientists keep their personal opinions and preferences separate from determining the conclusion.
Explanation:
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Imagine that you are a genetic counselor working with the first daughter in the last generation of the pedigree shown. She is married to a man with no history of ald in his family. The couple plans to have children and they want to know the chance of their first child having ald. How will you advise them?.
The chance of your first child having ald is 25%.Becose the adl gene may be recessive in this family.
How to advise them on family genetics?Recessive genes produce proteins considered “defective” as they become inactive. That is, they are hidden (recessive) with the presence of a dominant gene manifesting their characteristics in the absence of their dominant allele. The adl gene may be recessive in this family.
With this information, we can conclude that the chance of your first child having ald is 25%.
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Which statement would best explain why the carbon cycle is often referred to as the carbon oxygen cycle
Answer: A Plants take in oxygen and combine it with carbon and hydrogen to make carbohydrates.
Explanation:
A drug that blocks the fusion of tubulovesicular membrane and intracellular canaliculus in parietal cells would result in
Answer:
a decreased somatostatin production.
Explanation:
Describe where in the cell starch grains are found.
what is locomotion? how does it happen?
Answer:
Locomotion is basically the ability to move from one point to another point. It happens through our skeletal system and our muscular system working together.
Explanation:
Locomotion is the ability to move from one point to another. Locomotion is in any living organism that can move from one place to another, things like the ability to walk/run/climb/crawl any way to move to one place to another is locomotion. To describe how locomotion works I will use the example of a human, humans have a skeleton system and attached to those bones are tendons which are a part of the muscular system, the skeletal and the muscular system work together to give humans the ability to move, same case in most living organisms.
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which of the following would be considered genetic engineering
A. spraying a field with pesticide
B. crop rotation
C. changing the DNA of a crop plant to make it resistant herbicides
D. releasing ladybugs on a field to eat pest insects
C, changing the DNA of a crop to make it resistant to herbicides :)
Changing the DNA of an organism is engineering its genetics.
Changing the DNA of a crop plant to make it resistant herbicides would be considered genetic engineering. So, the correct option is C.
What is genetic engineering?The technological modification and manipulation of an organism's genes is known as genetic engineering, often referred to as genetic modification or genetic manipulation.
Genetic engineering is the addition, removal, or repair of a portion of the genetic material (DNA), which alters the phenotypic of the organism, to alter the genetic information of living organisms. It is also referred to as recombinant DNA technology or gene modification (r-DNA Technology). Genetic engineering would entail altering a crop plant's DNA to make it resistant to herbicides.
Thus, the correct option is C.
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Describe the interaction between the corn, water, soil, and air in the image. How does energy flow?
The food chain and food web serve as conduits for the energy flow. Plants, who are the primary energy producers in an ecosystem.
What is the mechanism of energy flow in an ecosystem?The autotrophs that absorb energy from the sun are an excellent example of how energy moves through an ecosystem.
Utilize their chloroplasts to accumulate sunlight, which is then partially altered into chemical energy during photosynthesis.
Herbivores eat the autotrophs thereafter, converting the plant's energy into fuel for themselves. Then, carnivores consume the herbivores, followed by other carnivores consuming the carnivores.
Therefore, energy flow in an ecosystem is connected by different trophic level.
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Animal cells tend to do best in a(n)
environment while plant cells do best in a hypotonic
environment.
Answer:
isotonic
Explanation:
What two substances make up most viruses?
Answer:
Viruses are made up of two basic parts: the core (nucleic acid- DNA/RNA and the capsid protein coat that surrounds the core.
Explanation:
Write down the names of various endocrine glands with their secretion and function.
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Explanation:
Hypothalamus
major hormones — anti-diuretic hormone (ADH), oxytocin and various hormones that stimulate the pituitary gland
influences — nervous and hormonal systems
Pituitary gland
major hormones — luteinising hormone (LH), follicle-stimulating hormone (FSH), prolactin, growth hormone, thyroid stimulating hormone (TSH), oxytocin, anti-diuretic hormone (ADH), adrenocorticotrophic hormone (ACTH)
influences — reproduction, growth, childbirth, breastfeeding, hormone regulation
The endocrine system.
Pineal gland
major hormones — melatonin
influences — sleep cycle
Thyroid gland
major hormones — tri-iodothyronine (T3), thyroxine (T4), calcitonin
influence — metabolism, bone health
Parathyroid gland
major hormones — parathyroid hormone
influences — calcium and vitamin D regulation
Adrenal glands
major hormones — adrenaline, noradrenaline, cortisol, aldosterone
influences — stress response and blood pressure/salt control
Pancreas
major hormones — insulin, glucagon, somatostatin
influences — blood sugar control
Ovaries (females only)
major hormones — oestrogen, progesterone
influences — female characteristics
Testes (males only)
major hormones — testosterone
influences — male characteristics
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When pathogens are ingested by the macrophages and dendritic cells of the immune system, they are digested and a small portion of the pathogen, __________, is attached to the surface of the macrophage.
Answer:
Antigen
Explanation:
on the surface of the pathogen that helps immune cells identify then
When pathogen are swallowed by the immune system's macrophages and dendritic cells, they are digested and a small amount of the pathogen's antigen is attached to the macrophage's surface.
What is antigen?
Any chemical that triggers the body's immune system to react negatively to it. Toxins, chemicals, germs, viruses, and other things originating from the outside of the body are examples of antigens.
In reaction to exposure to antigens, B cells of the immune system create Y-shaped proteins known as antibodies (immunoglobulins).
Antigen receptors, such as antibodies and T-cell receptors, are responsible for recognizing antigens.
Immune system cells produce a variety of antigen receptors, giving each cell a specificity for a single antigen.
Therefore, antigen is attached to the surface of the macrophage.
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When a cold air mass collides with a warm air mass and lifts the warm air out of its way, there is _______.The rising warm air causes water vapor to condense and clouds to form.
A )cold front
B ) A hot and cold front
C ) hot front
D ) None of the above
Answer:
c
Explanation:
QUESTION PROKARYOTES EUKARYOTES VIRUSES Does it have a nucleus? Does it have membrane-bound organelles? Does it have a cell membrane? Does it have DNA? Is it small, smallest or biggest in size of the three? Imagine in the future that you are an astrobiologist (astrobiologists are scientists who look for life in space) on a mission to another planet. You have discovered something that may or may not be alive, may or may not be prokaryotic or eukaryotic. What information could you gather and analyze about its structure to determine the answer? How can you justify (support) your answer?
Answer:
the prokaryotic virus does not have a nucleus (????) but I do think it has a membrane bound organelle. cant answer the rest. Hope this helps!!!
Explanation:
I did it in biology but the teacher was a bit of a bad teacher.