Answer:
Influenza viruses and others continually change over time, usually by mutation. This change enables the virus to evade the immune system of its host so that people are susceptible to influenza virus infection throughout their lives. Bacteria mutate in the same way and can also become resistant if overtreated with antibiotics.
Select all the correct answers.
Snakes, dogs, and humans have a vertebral column. Snakes and dogs have tails, and humans have vestigial tailbones. Dogs and humans have limbs, but snakes do not. Most reptiles lay eggs, but a few give birth to live young. What do these structures suggest about the evolutionary pattern between the three organisms?
A Snakes and dogs are more closely related than snakes and humans.
B Snakes and humans are more closely related than humans and dogs.
C Dogs and humans are more closely related than snakes and humans.
D Dogs, snakes, and humans share a common ancestor.
E The early ancestor of snakes and dogs is the same, and the early ancestor of humans is different.
This is for Science Please Help!!
These structures suggest that Dogs and humans are more closely related than snakes and humans.
Does snake have backbone?
Yes, snakes have a backbone. The backbone is made up of a series of bones called vertebrae, which are connected by ligaments and muscles. The vertebrae of a snake are unique because they are loosely connected, allowing the snake to move and bend in a wide variety of directions.
Dogs and humans are more closely related than snakes and humans because they both have vertebral columns, tails, and limbs while snakes only have a vertebral column and a tail. This suggests that a common ancestor shared these features with both dogs and humans, while the common ancestor of snakes did not possess these features.
Therefore, Dogs and humans are more closely related than snakes and humans is the correct answer.
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Dogs, snakes, and humans share a common ancestor. The presence of a vertebral column in all three organisms suggests that they belong to the same group of vertebrates,
So the correct answer is D. Dogs, snakes, and humans share a common ancestor.
What is a common ancestor?
A common ancestor is a hypothetical organism that is ancestral to two or more different groups of organisms. In other words, a common ancestor is an organism that gave rise to two or more distinct lineages through evolutionary divergence. All organisms that share a common ancestor are said to be related, and their evolutionary relationships can be represented as a branching tree-like diagram called a phylogenetic tree. The concept of a common ancestor is fundamental to evolutionary biology, as it allows scientists to infer the evolutionary history and relationships between different groups of organisms.
Dogs, snakes, and humans share a common ancestor. The presence of a vertebral column in all three organisms suggests that they belong to the same group of vertebrates, but differences in tails and limbs suggest that their ancestors underwent evolutionary changes that led to these differences.
Therefore, options A and C are partially correct but do not capture the full picture, while option B is incorrect. The correct answer is D.
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what is an advantage of external fertilization?
Answer: Helps keep the species alive
Explanation:
When the eggs are externally fertilized, there is a greater chance for multiple different males to fertilize the eggs. This gives Gene diversity, and helps keep the species alive. It may also help keep the eggs in good condition. For example, when fish lay eggs, the water helps keep the eggs moisturized.
What do we call the “X” chromosome that condenses and is “shut off?”
Answer:
One of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells, this is called X-inactivation or lyonization
Explanation: This is all I could find, sorry if it's not what you need.
can virus show response against heat, chemical and temperature?If yes then how?
Answer:
Yes, anything can respond to heat and against heat and temp and maybe chemicals including a virus.
Explanation:
The virus can mutate and develop new genes to bounce back the chemical or the heat and temps, it could respond differently than an un-mutated virus because it has adapted to those environments
Hope this helps at least a little<3
Why did Hershey and Chase label the viral DNA with radioactive phosphorous and not radioactive sulfur?
Answer:
Well, all DNA contains phosphorus, and lacks sulfur, whereas protein contains sulfur but no phosphorus. Only one sample had only radioactive DNA while the other only contained radioactive protein.
The muscle cells of a basketball player are examined after an injury that required her to be placed on the injured list. Muscle cells require a lot of energy to function. The number of organelles in her cells are counted. Which of the following findings are most likely to occur after 6 months of required rest and inactivity?
Answer:
D) The number of mitochondria has decreased due to long period of rest
Explanation:
The cell organelles perform various functions in a cell. For example, the nucleus contains the genetic material of the cell, the ribosome function in protein synthesis, the mitochondria is the site for ATP synthesis, etc.
An athlete such as a basketball player requires a lot of energy for his/her activities. This energy is provided through the contraction and relaxing of muscle fibres. The mitochondria, the cell organelle required for energy synthesis will be present in very large numbers in the athlete's muscle cells in order to provide him/her with the required energy.
However, in the case of an injured athlete who has been out of action for 6 months, there would be a reduction in the number of mitochondria in the muscles due to this long period of inactivity.
Therefore, the correct option is D; The number of mitochondria has decreased due to long period of rest.
question 20 , please help:(
What are the combined alleles of all individuals in a population called?
A
relative frequency
B.
phenotype
С
genotype
D
gene pool
Answer:D, gene pool.
Explanation: relative frequency can refer to the proportion of a particular genotype or phenotype in a population.
Phenotype is the physical expression of the genotype.
Genotype is the specific form of the alleles of genes
Gene pool is the totality of genetic variations in a population
Please help. I'll give brainliest :)
What is a terminal moraine and how is it formed?
A. a buildup of debris where the glacier stopped and began to recede
B. sediment from the edges of a melted glacier
C. the lakes that are formed by melted ice blocks
D. glacier rivers that carry sediment to the sea
Answer:
B
Explanation:
Your welcome
Answer:
B I believe! terminal= end/ edges
The different forms of a gene are called
(1 Point)
traits
hybrids
alleles
Webbed fingers is inherited as a recessive X-linked trait. An unaffected male has children with an affected female. What is the chance that their male children will have webbed fingers?
A. 50% of their male children will have the trait.
B. 100% of their male children will have webbed fingers
C. 0% of their male children will have webbed fingers.
D. 25% of their male children will have the trait
NOTE : I know that the answer is not A. 50% of their male children will have the trait.
Answer:
its b
Explanation:
Which of the following is not a part of the DNA nucleotide
Answer:
Which of the following is not part of nucleotide structure? C is correct. The three components of a nucleotide are a 5-carbon sugar, a phosphate group, and a nitrogenous base. A nucleotide does not contain phospholipids; those are molecules that make up the cell membrane and nuclear envelope.
Explanation:
this should be right next time add an atachment
Protein or lysine amino acid is not a part of the deoxyribonucleic acid (DNA) nucleotide.
What is a nucleotide?A nucleotide can be defined as the subunit of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) which contains a nitrogenous base.
Furthermore, deoxyribonucleotides which is the basic unit of a deoxyribonucleic acid (DNA) typically comprises the following:
A nitrogenous base.A phosphate group.Deoxyribose sugar (5-carbon sugar).In conclusion, we can deduce that protein or lysine amino acid isn't a part of the deoxyribonucleic acid (DNA) nucleotide.
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please help i’ll give the brainliest if you give a correct answer tysm
Answer:
C. how close earth is to the sun
Answer:
C
Explanation:
A cell with 20 chromosomes undergoes MEIOSIS. Which of these statements is true?
1 Point)
a. 4 daughter cells will be created and each daughter cell will have 10 chromosomes.
b. 2 daughter cells will be created and each daughter cell will have 10 chromosomes.
c. 4 daughter cells will be created and each daughter cell will have 20 chromosomes.
d. 2 daughter cells will be created and each daughter cell will have 20 chromosomes.
Answer:
A.
Explanation:
By the end of meiosis 4 daughter cells will be produced with half the amount of chromosomes the original parent cell has, haploid.
A cell with 20 chromosomes undergoes meiosis produces 4 daughter cells and each daughter cell will have 10 chromosomes. Thus option A is correct.
What is Meiosis?The cell division in which a cell divides twice to form four haploid daughter cells called as Meiosis.
The cell division occur in two steps nuclear division or karyokinesis and cytoplasmic division called as cytokinesis.
This type of cell division are seen in sexually-reproducing organisms mostly germ cells.
During reproduction diploid organism produces haploid number of gametes such as egg and sperm.
The gametes unite to create a new zygote with the same number of alleles as the parents.
The meiosis occur in 2 stages that is meiosis I, meiosis II and Each stage is classified into several phases such as Prophase, Metaphase, Anaphase, Telophase, Cytokinesis.
Prophase I of meiosis I can have five subphrases, such as Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis.
Hence, option A is correct.
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someone PLEASEEEEEE answer this question for me i really want to pass ); <333
Which point shows the prevailing westerlies?
O1
O 2
O3
O4
Answer:
1
Explanation:
Prevailing Westerlies are the winds in the middle latitudes between 35 and 65 degrees latitude. They tend to blow from the high pressure area in the horse latitudes towards the poles. These prevailing winds blow from the west to the east steering extra-tropical cyclones in this general manner.
Match type of adaptation to the correct example
Answer:
hope this helps you! :)
When you hyperventilate, what gas is your body deficient in?
Answer:
You breathe in oxygen and breathe out carbon dioxide. Excessive breathing creates a low level of carbon dioxide in your blood. This causes many of the symptoms of hyperventilation.
Please help :)
Will water move from the blood to the cell, or from the cell to
the blood?
Which has the higher concentration of water, the cell or the blood?
Does this require energy?
Is this active or passive transport?
Is this diffusion or
osmosis?
Does the blood cause a hypotonic or hypertonic environment for the cell?
What will more likely occur to the cell if the movement of water continues in the same direction,plasmolysis or cytolysis?
Explanation:
WATER WILL MOVE FROM THE BLOOD TO THE Cell
Cell
No it dosent require energy active
Osmosis
yes it dose have an enviorment
Someone help me pleaseeee
Answer:
oxygen and carbon dioxide
Answer:
B
Explanation:
oxygen and carbon dioxide
PLEASE HELP
Students visiting a zoo see a poison dart frog. This bright red frog
is about 2-centimeters long. It eats ants and other small insects.
The poison dart frog secretes a poisonous chemical from its skin.
It lives around green tropical plants.
What is the advantage of this frog having a bright red color in a
green environment?
A)it helps to hide among plant leaves
B)it helps to sneak up on small insects
C)it serves as a warning to hungry predators
D)it prevents overheating in a tropical climate
Where are instructions for traits found?
A. On chromosomes
B. On the nucleus
D. On genes
C. On the cell walls
For the food chain GRASS --
---> GRASSHOPPER -
---> RAT---> SNAKE -
---> HAWK, if humans
destroyed 75% of the grassland ecosystem, which of the following organisms would
disappear first in this habitat?
Answer:
hi bro mark me ad a brainlist
Explanation:
snake is the right answer
7. The synthesis of which molecule(s) could be affected by the mutation of DNA?
A. mRNA only
B.Proteins only
C.Both MRNA and
D. neither mRNA nor proteins
Answer:
mRNA
Explanation:
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The synthesis of ; ( C ) Both mRNA and proteins could be affected by the mutation of DNA
The formation of mRNA occurs in the nucleus via the synthesis of a nucleotide sequence of DNA ( transcription ) while the synthesis of proteins is directed by the mRNA.
Therefore any mutation of the DNA will have a direct effect on the synthesis of Both mRNA and Proteins.
Hence we can conclude that The synthesis of Both mRNA and proteins could be affected by the mutation of DNA.
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Should you be worried about the direction that a plant’s stem will grow if you plant the seeds on their sides? Why or why not?
Answer:
Explanation:
Metal
How many dots would surround Li in an electron dot diagram?
Answer:
2
Explanation:
what are the main parts of the respiratory system
Answer:
lungs ,diaphragm ,mouth ,nose
Answer:
Explanation:
Nose.
Mouth.
Throat (pharynx)
Voice box (larynx)
Windpipe (trachea)
Large airways (bronchi)
Lungs.
Which side of the heart carries poorly oxygenated (deoxygenated) blood?
left or right
Answer:
poor oxygenated goes through right
Explanation:
Answer:
left
Explanation:
From the left atrium blood flows into the eft ventricle.
________ is a collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment. They vary in size from all the organisms living on a decaying rock to the whole wetland.
A Biome
B Biosphere
C None of the above
D Community
E Ecosystem
Which human activity contributes the MOST Carbon dioxide to the atmosphere?
A. Fishing
B. Breathing
C. Burning Fossil Fuels
D. i Farming
Answer:
C. Burning Fossil Fuels
Hope it helped :)