A genetic modification caused by the substitution of a single nucleotide for another nucleotide is called point mutation. Transition mutations and transversion mutations are two types of point mutations.
Point mutations are gene mutations that occur when a single nucleotide base in an organism's genome is changed, inserted, or deleted. Point mutations have a variety of effects on downstream protein product, with moderately predictable consequences based on mutation-specific features. In terms of protein production, composition and function, these consequences can range from no effect (e.g., synonymous mutations) to negative effects (e.g., frameshift mutations).
Conversion occurs when one purine moiety is replaced by another purine or one pyrimidine is replaced by another pyrimidine. The conversion occurs when the purine is replaced by pyrimidine or vice versa. The wrong mutation leads to the creation of a different amino acid. Missile mutations, also known as nonsynonymous alterations, alter one codon to produce another protein. The term point mutation is sometimes used to describe the addition or deletion of a base pair.
To learn more about point mutations and its types, here
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Select the statement that describes the major site where antiviral action is blocked by the protease inhibitors. Select one: a. The protease inhibitors block the ability of the human immunodeficiency virus from attaching and entering the cell membrane. b. The protease inhibitors block the uncoating process of the human immunodeficiency virus by binding to protease. c. The protease inhibitors block the nucleic acid synthesis of the human immunodeficiency virus. d. The protease inhibitors inhibit the late protein synthesis and processing of the human immunodeficiency virus.
Answer:
d. The protease inhibitors inhibit the late protein synthesis and processing of the human immunodeficiency virus.
Explanation:
Protease inhibitors are antiviral agents used to fight against pathogenic viruses such as retroviruses (e.g., human immunodeficiency virus, HIV) and RNA viruses (e.g., hepatitis C virus). Protease inhibitors can drastically reduce the viral load. Protease inhibitors may target 1-virus-encoded proteases which are responsible to produce functional proteins from polyprotein precursors and 2-processing structural proteins that are required for virus assembly. Some examples of protease inhibitors include, among others, ritonavir and indinavir, which are used in patients with HIV infection.
what is one difference between ion channels and ion pumps
Answer:
Ion pumps can be distinguished from ion channels on the basis that ion pumps actively transport ions against a concentration gradient, while ion channels allow ions to passively flow down a concentration gradient.
Explanation:
Fitness is defined as the probability of an organism ............ and ............ in the environmen
in which it is found.
Which words correctly complete gaps 1 and 2?
A. photosynthesising and respiring
B. reproducing and respiring
C. surviving and reproducing
D. surviving and photosynthesising
Answer:
C
Explanation:
A student created a table to compare animal adaptations. Based on the table, which
animal has a behavioral adaptation, and how does it give the animal an advantage?
Animal Adaptation
Duck Webbed feet
Squirrel Collects and stores food
The duck, because the behavioral adaptation allows it to catch prey.
The duck, because the behavioral adaptation helps it survive the environment.
The squirrel, because the behavioral adaptation provides food during winter.
The squirrel, because the behavioral adaptation to have more offspring.
Answer:
B
Explanation:
Ducks have the webbed feet so, they could swim in the water so they don't drown. That is animal adaptation to the environment.
Based on the given table, the animal with a behavioral adaptation is the squirrel, which collects and stores food. This adaptation gives the squirrel an advantage by helping it survive during times when food is scarce, such as during the winter months, which is in the third option.
What is behavioral adaptation?The behavioral adaptation of collecting and storing food is an important survival strategy for many animals, including squirrels. During times of abundance, such as the fall months, squirrels will collect and store food, such as nuts and seeds, in order to have a food source during times of scarcity, such as the winter months. This allows the squirrel to survive and avoid starvation during times when food is less readily available.
Hence, Based on the given table, the animal with a behavioral adaptation is the squirrel, which collects and stores food. This adaptation gives the squirrel an advantage by helping it survive during times when food is scarce, such as during the winter months, which is in the third option.
Learn more about the behavioral adaptation here.
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Biology 1
Food web
Food chain
Hurry up pls
.In the cladogram above, which pair of species is most closely related to each other? * 2 points a. Hamster and salamander b. Lizard and salamander c. Salamander and mountain lion
Answer:
b. Lizard and salamander
Explanation:
Both Lizard and salamander are closely related species because of their body structure and appearance. Both Lizard and salamander have similar shape and structure but belongs to different group. Lizard belongs to reptiles whereas salamander belongs to amphibian family. Both Lizard and salamander are vertebrates, cold blooded animals, carnivorous, has a tail and four legs. So we can conclude that both Lizard and salamander are closely related to each other.
Where does The energy come from to heat the oceans
Answer:
the sun
Explanation:
What magnification will you generally start out using when scanning for parasites? A. 4X. B. 10X. C. 40X. D. Both A and B.
Answer:
Explanation:
D. Both A and B
Using information from the cladogram and the data table shown below, which of the following best describes the evolutionary history of gorillas?
They are more closely related to salamanders than they are to lizards.
They evolved into a separate species as a result of bipedal motion.
They have jaws, lungs, hair, an amniotic membrane, and a tail but lack bipedal motion.
They share a more recent common evolutionary ancestor with leopards than they do with lizards.
Answer:
Several differences allow the human to walk erect on two legs with a striding gait rather than move in a knuckle-walking fashion like the gorilla. In the pelvis these differences include ...
If you were to examine a sample of 1000 cells, in which of the phases listed below would you expect to find most of the
cells?
O Interphase
O Metaphase
O Anaphase
O Telophase
Answer:
Interphase
Explanation:
interphase
The sugar that is made during photosynthesis is ribose.
True
False
Answer:
True! :) Also, reminder drink some water and relax. <3
Explanation:
What is the molecule called that all living things use for immediate
useable energy?
ATP, Sugar,fat, All of these
Hello there!
I think ATP would be the answer in this instance. See, ATP is the pure form of energy that cells prefer to use. Sugars and fats are good for energy, too - but sugars and fats must be converted into energy before use. So ATP is the only energy source listed that doesn't need to be metabolized before the cell can use the energy.
I hope this helps!!
GIVING BRAINLIEST!!!!!!
Rule 1: Multiply by 2 starting at 10. Rule 2: Subtract 4 starting from 24. What is the first term that appears in both sequences?
10
14
20
26
Answer: 20. have a nice day!
Answer:
Explanation:
30
A plant can be made resistant to weed killers through genetic engineering. how can genetic engineering create a plant resistant to the weed killer?
A. By exposing the plant to different weed killers
B. By modifying the plant’s cells to make new proteins
C. By harvesting the plant in a different season
D. By exposing the plant’s cells to ultraviolet radiation
which heats up faster
Water or air
Answer:
Air
Explanation:
Air.
Why? Because air has a much lower specific heat capacity (Heat capacity - Wikipedia) per unit mass than water. Also, air is dispersed as a gas so that in any given volume the mass of air that would fill it is only a fraction of the mass of water that would fill the same volume. Take these two factors into consideration and you see that the amount of energy it takes to raise the temperature of a volume of air by one degree is minuscule compared to the amount of energy it takes to heat the same volume of water by one degree.
The one thing that is more challenging about air is actually getting the energy into it. Water is densely packed, whereas air molecules are much more widely separated, so that presents a heat conductivity challenge. However, if we’re talking about equipment specialized for heating air (i.e. a fan forcing air over heated coils) versus equipment specialized for heating water (flat plate, coils, pumps or no pumps, whatever), energy added at the same rate to each will heat an equivalent volume of air to a greater extent (i.e. raising temperature more quickly) that it will water.
The word “contract” in this paragraph tell you:
A. The muscles are involuntary
B. The muscles are aching
C. The muscles become larger
D. The muscle tighten inward
As a glacier moves across the land, it pushes soil and rocks in front of it and to the sides of it. What are the hills resulting from this soil called?
Answer: They are called Moraines
Explanation: A glacier is a large body of ice originating from land that constantly moves slowly over land. It occurs in almost all parts of the world and makes up about 3/4 of fresh water all over the world.
Glaciers constantly move on land and they do this under their own weight.
As a glacier moves across land, it pushes soil and rocks in front of it and to the sides of it.
The resulting hill formed as a result of this soil movement is called a Moraine.
A moraine is sometimes referred to as a glacial till. It is an accumulation of materials (usually soil and rock) left behind by a moving glacier.
What is Mpemba's effect?
Answer: The Mpemba effect is a catch-all term for possible cases in which hot water appears to freeze faster than cold water. The phenomenon is temperature-dependent. There is disagreement about the parameters required to produce the effect and about its theoretical basis.
Explanation:
Answer:
The Mpemba effect is a catch-all term for possible cases in which hot water appears to freeze faster than cold water.
Explanation:
4. This photograph was taken in 2004, 24 years after Mount Saint Helens erupted. Compare and contrast this photo with the previous three. What changes do you see in the biotic and abiotic factors? Does anything surprise you about this series of photographs?
Answer:
In this picture the ground is now completely covered in vegetation and trees are growing back all along the road and sides of the picture. Then there’s little flowers and grass and bushed all over the place. In the other pictures the ground was bare, with the second and third pictures having bushes and other little vegetation starting to grow. Changes in the Biotic Factors: There are now larger trees, there is grass, flowers, small bushes, and other small vegetation growing. Changes in Abiotic Factors: The ground is no longer dust and ash, The dead trunks and branches are covered in vegetation for the most part and are decomposing.
Explanation:
Brainliest Please?!
Which of the following is a characteristic that only living things share?
O A. They grow and develop.
O B. They need materials and energy.
O C. They respond to their environment.
O D. They are made of at least one cell.
Answer:
D
Explanation:
To be a livivng thing you must have cells
Match the following vocabulary words. 1.ciliary musclesA transparent liquid which is located between the cornea and iris. 2.optic nerveMuscles attached to the lens to change its shape 3.coneA photoreceptor cell which functions best in bright light. It detects color. 4.vitreous humorThe transparent portion of the sclera at the front of the eye 5.retinaA special part of the choroid layer composed of colorful tissue 6.rodThe nerve connecting the eye to the brain 7.aqueous humorSpecialized cells located in the retina that receive light images 8.scleraA delicate light-sensitive membrane covering the inside of the eyeball 9.irisA photoreceptor cell which is sensitive to dim light, but detects no color10.corneaA fibrous material surrounding the eye to give it shape11.photoreceptorA transparent jellylike substance filling the eyeball
Answer:
1. Aqueous humor.
2. Ciliary muscles.
3. Cone.
4. Cornea.
5. Iris.
6. Optic nerve.
7. Photoreceptor.
8. Retina.
9. Rod.
10. Sclera.
11. Vitreous humor.
Explanation:
A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.
Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.
An eye can be defined as a specialized organ of sight with the capability to receive visual images that are subsequently transduced into neural signals and relayed to the brain for processing and interpretation. Some of the components of the human eye matched with their description are;
1. Aqueous humor: a transparent liquid which is located between the cornea and iris.
2. Ciliary muscles: muscles attached to the lens to change its shape.
3. Cone: a photoreceptor cell which functions best in bright light. It detects color.
4. Cornea: the transparent portion of the sclera at the front of the eye.
5. Iris: a special part of the choroid layer composed of colorful tissue.
6. Optic nerve: the nerve connecting the eye to the brain.
7. Photoreceptor: specialized cells located in the retina that receive light images.
8. Retina: a delicate light-sensitive membrane covering the inside of the eyeball.
9. Rod: a photoreceptor cell which is sensitive to dim light, but detects no color.
10. Sclera: a fibrous material surrounding the eye to give it shape.
11. Vitreous humor: a transparent jellylike substance filling the eyeball.
Answer:
1. A transparent liquid which is located between the cornea and iris - aqueous humor
2. Muscles attached to the lens to change its shape - ciliary muscles
3. A photoreceptor cell which functions best in bright light, it detects color - cone
4. The transparent portion of the sclera at the front of the eye - cornea
5. A special part of the choroid layer composed of colorful tissue - iris
6. The nerve connecting the eye to the brain - optic nerve
7. Specialized cells located in the retina that receive light images - photoreceptor
8. A delicate light-sensitive membrane covering the inside of the eyeball - retina
9. A photoreceptor cell which is sensitive to dim light, but detects no color - rod
10. A fibrous material surrounding the eye to give it shape - sclera
11. A transparent jellylike substance filling the eyeball - vitreous humor
How would life on earth change if there was no clean water or air?
Answer:
With no water supply, all vegetation would soon die out and the world would resemble a brownish dot, rather than a green and blue one. Clouds would cease to formulate and precipitation would stop as a necessary consequence, meaning that the weather would be dictated almost entirely by wind patterns.
are food will die then the animals will die then we would die and the earth wouldn't be green no more it will be brown and bry there will be no clouds ether or grass
What is the phenotype of the sons in generation III? How do you know? amobia sisters
Explain how the nervous and endocrine systems work together to control the body and maintain homeostasis in a paragraph.
Answer:
Explanation:
The nervous system controls virtually all body activities, and the endocrine system secretes hormones that regulate these activities. Functioning together, the organ systems supply body cells with all the substances they need and eliminate their wastes. The glands of the endocrine system secrete hormones into the bloodstream to maintain homeostasis and regulate metabolism. The hypothalamus and the pituitary gland are the command and control centers, directing hormones to other glands and throughout the body.
The word "mycotoxins" means © food poisons parasitic poisons fungus poisons O bacteria poisons
Answer:
I think the answer is food poison
Answer: poisons fungus poisons
Explanation:
how are biodiversity and the cycling of matter related to maintaining ecosystem services
Many key ecosystem services provided by biodiversity, such as nutrient cycling, carbon sequestration, pest regulation and pollination, sustain agricultural productivity. Promoting the healthy functioning of ecosystems ensures the resilience of agriculture as it intensifies to meet growing demands for food production.
Please help me
need answers
Will give the brainliest!
Answer:
1. Option B
2. Option B
Please vote brainliest for further answers :)Why didn’t Henrietta get compensated for her cells
In a certain ecosystem, there is a population of lynx that feed on snowshoe hares. If there is less food for the hare for several years, what will most likely be the result for the lynx population?
A. The lynx population will increase.
B. The lynx population will decrease.
C. The lynx population will go extinct.
D. The lynx population will stay the same.
Answer:
B
Explanation:
since the will be less food for the hare, less hare will be able to survive. that means some lynx will not get hare and the lynx will die which means the lynx population will decrease
In corgis, a breed of dog, short tails are completely dominant to long tails. If two long-tailed corgis have puppies, what is the percent chance of having a puppy with a short tail?
Answer:
0%
Explanation:
This question involves a single gene coding for tail length in a breed of dog called Corgis. The allele for short tail (S) is dominant over the allele for long tail (s).
According to this question, two long-tailed corgis are crossed i.e. ss × ss. Each parent corgis will produce only 's' gametes. Using this gametes in a punnet square (see attached image), the following proportion of puppies will be produced:
All ss (long-tailed) offsprings/puppies.
Based on the question asked, 0% or none of the puppies produced will have a short tail.