In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U). The base pairs in RNA are therefore A-U and G-C.
Which of the following best describes conditions that scientists hypothesize to have existed on early Earth?
Extremely cold temperature
Lack of water vapor in the atmosphere
Presence of self-replicating molecules
Very low levels of free oxygen
Answer:
presence of self replicating molecules
5.) The following examples are vestigial organs EXCEPT:
O appendix
O tailbone(coccyx)
O human liver
O Pelvic bone(little bone) of the snake
Answer:
C
Explanation:
because a vestigal organ is one that serves no relevant purpose and we do not need any of the following options except for the liver.
a diagnostic procedure that involves removing a tissue sample from a patient.
a. lipotrispy
b. biopsy
c. pathogenesis
d. oncology
Answer:
b. biopsy
Hope this helps!
Answer:
Biopsy.
Biopsy is the removal of tissue for further medical examination or for science.
Hope this helps.
Azumayay
non-cancerous tumors are called what
Answer:
Benign Tumors
Explanation:
10. Why are most species that have ever lived on Earth extinct?
Explanation:
At least 571 species have been lost since 1750, but likely many more. The main cause of the extinctions is the destruction of natural habitats by human activities, such as cutting down forests and converting land into fields for farming.
Answer:
Some animals have gone extinct due to over hunting on them for skin, while some have died of because they weren't able to adapt to their environment because it change over time, causing them to go extinct
Explanation:
What decreases in the water when algae grow quickly?
Answer:
Fish and other insects
Explanation:
Hope that helps
what do eukaryotes have that prokaryotes lack?
a) cell walls
b) nuclei
c) chroloplasts
d) ribosomes
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b) nuclei
thanks hope it helpsWrite a paragraph to explain how Motown Records became a hit with music fans in the 1960s. Use examples from the Article to support your ideas.
Answer:
60s Motown: When An Independent Detroit Record Label Ruled The World ... Across the Atlantic in Europe, influential bands became fans of soul and R&B, ... Gordy had written hits for Jackie Wilson in the 50s and knew something about what Motown songs reflected the agonies of the mind and soul before this became popular Explanation:
Which 2 disorders are the most similar? Hemophilia, Beta Thalassemia, Sickle Cell Disease. Explain.
Answer:
Sickle Cell and Thalassemia are similar because they are both genetic disorders and are both caused by errors in the genes for hemoglobin, a substance composed of a protein
Explanation:
Mitosis ans meiosis are both ways in which cells___?
Answer:
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.
Explanation:
How does blood travel from your heart to your limbs, such as your arms and legs?
A
through veins
B
through capillaries
C
through arteries
D
through carbon dioxide
Answer:
A
Explanation:
I'm not completley sure but veins go to every location in your body while capillaries and arteries are in designated areas.
Answer:
c
Explanation:
What describes the goal of genetically engineering crops?
Answer:
Genetically modified crops (GM crops) are those engineered to introduce a new trait into the species. Purposes of GM crops generally include resistance to certain pests, diseases, or environmental conditions, or resistance to chemical treatments (e.g. resistance to a herbicide).
What is meant by "between
organisms"?
A. The distance between organisms
B. The distance between environments
C. The interaction between organisms
D. The interaction between ecology and biology
Answer:
C. The interaction between organisms
A researcher wants to learn more about inherited traits which part of a cell might she study to learn about inherited traits?
A: The nucleus because it contains chromosomes that hill genetic information responsible for inherited traits
B: The cell wall because it holds all of an individual's genetic information
C: The Mitochondria because it contains ribosomes that holds genetic information responsible for inherited traits
D: The cell membrane because it holds all of an individuals genetic information
Which of the following conditions is least likely to have an effect on natural selection in a species of sheep that are geographically isolated on an island?
A. available niches
B. existing predators
C. chromosome number
D. available food resources
Answer:
A. available niches
Hope it helps!
Answer:
C.
Chromosome number
Explanation:
In a human karyotype, the 46 chromosomes of the human genome are arranged into 23 pairs. Encyclopædia Britannica, Inc. An organism with any multiple diploid numbers of chromosomes is said to be polyploid.
What is required for sympathetic speciation to occur?
A. Continuous gene flow populations'
B. Geographic separation of a population
C. Emergence of a reproductive barrier
D. A limited separation of members of a population, followed by reintroduction back into the parent population
Answer:
I'm no biology teacher but I think its C im in 8th grade and did this last year i believe(:
Explanation:
Hope this helps you out!
Which type of food products store best in the freezer?
A. Low Water Content Foods
B. Average Water Content Foods
C. High Water Content Foods
Can anyone tell me how old this bird is. We found it outside.
Parenchyma is a simple permanent tissue and xylem is a complex
permanent tissue.
Answer:
Explanation:
This is parenchyma is found below the epidermis of plants and It of living cells that have thin cell walls which are loosely packed to accommodate the intracellular space. Parenchyma consist of chlorophyll and they take part in photosynthesis.
Xylem is called a permanent tissue because it contain various types of cells like tracheids, vessels, xylem fibres, xylem parenchyma which is responsible for storing food.
Help please!! I'll name you brainliest!!
Answer:
Aerosols they leave freely through the ozone
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Biogeochemical cycles in ecosystems PROJECT: modeling the carbon cycle
Blood leaves the left ventricle through the vessel known as:
A) pulmonary trunk
B) superior vena cava
C) inferior vena cava
D) aorta
Humans, like other organisms, require energy for growth and repair. When cells create ATP for energy, carbon dioxide is produced as a waste product. How does the body respond to this process in order to maintain homeostasis?
Answer:
The circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.
Explanation:
Carbon dioxide produced by the cells and tissues during cellular respiration is removed from the body through the interaction of the circulatory and respiratory system. The medium of transport of carbon dioxide is the blood which carries to the lungs, where it is expelled from the body in ordernto maintain homeostasis in the body.
Carbon dioxide molecules are transported in the blood from body tissues to the lungs in three ways:
1. Dissolution directly into the blood - due to its greater solubility in blood than oxygen, carbon dioxide is dissolved in blood plasma. On reaching the lungs, it leaves the blood by diffusion and is then expelled out of the body.
2. Binding to hemoglobin - carbon dioxide binds reversibly with haemoglobin in the red blood cells to form a molecule called carbaminohemoglobin. When it reaches the lungs, the carbon dioxide freely dissociate from the hemoglobin and is expelled from the body.
3. Carried as a bicarbonate ion - the majority of carbon dioxide molecules are carried as part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. The enzyme carbonic anhydrase within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3) which then dissociates into bicarbonate and hydrogen ions. The bicarbonate ions leaves the red blood cells in exchange for chloride ions in the plasma. The bicarbonate ions then travel in plasma to the lungs, where they enter the red blood cells again. It combines with hydrogen ions from the haemoglobin to form carbonic acid. Carbonic anhydrase breaks carbonic acid down into water and carbon dioxide which is then expelled from the lungs.
Answer both questions.. would be greatly appreciated.
Which of the following situations would be followed by primary succession? (choose all that apply):
a) earthquake
b) severe landslides
c) lava flows
d) overgrazing
Which of the following would be followed by secondary succession? (choose all that apply):
a) earthquake
b) lava flows
c) overgrazing
d) tornado
Answer: the first one is overgrazing and severe landslides
Explanation:
Answer:
Which of the following situations would be followed by primary succession? (choose all that apply):
LAVA FLOWS
Explanation:
What type of molecule is produced by the ribosome?
A. DNA
B. RNA
C. protein
D. all listed
Answer:
The correct answer is - C. protein.
Explanation:
Ribosomes are biological molecules that are made up of RNA and proteins. These molecules produce protein molecules with the help of mRNA by the process of translation. These molecules are called the factory of protein or protein synthesis site.
The RNA that is present in these molecules is ribosomal RNA. These are attached to the other cell organelles called endoplasmic reticulum used the protein to check and modify them.
a.) Give one example of how animals respond to their environment
b.) Give one example of how plants respond to their environment
Answer:
1. Animals may to environmental stimuli through behaviors that include hibernation, migration, defense, and courtship. As a result of cold, winter weather some animals will hibernate. Examples of hibernating animals maybe ants, snakes, black bears, beavers, and ground squirrels.
2. Plants grow towards the light. Plant leaves bud and seeds germinate when the temperature is right. Their roots and stems grow in certain directions in response to the pull of gravity.
Explanation:
Answer:
a) For example, a cat may see a saucer of milk. Information from
the cat’s eyes travels along nerve cells to the brain, where the brain
processes the information. If the brain decides it wants the milk,
the brain sends a signal to the muscles in the cat’s limbs, and the cat
moves to the saucer of milk and drinks it
Explanation:
b) For example,
specialized cells in the leaves of trees detect the decrease in sunlight
as winter approaches. Chloroplasts then reduce production of green
chlorophyll. As existing chlorophyll is broken down, other coloured
particles are revealed, creating the beautiful red- and orange-coloured
leaves we see during autumn. Th e leaves eventually die and fall off . In
the spring, increased sunlight and warmer temperatures promote the
production of new leaves containing large amounts of chlorophyll, and
the green colour returns to the leaves.
1.2 DESIGN CONSIDERATION
Answer the following questions:
1.2.1 What problem did the paramedics encounter at the accident scene?
Answer: Paramedics are the medical professionals which perform multitasking in providing medical aid to the patients in the field as well as in the hospital.
Explanation:
Problems encountered by the paramedic at the accidental scene:
1. Major problem is the collection of the blood and other bodily fluids for examination as it is contaminated over spilling on the road.
2. Stabilizing and uplifting of the patient found on accident and curating them to ambulance is a labor consuming task.
3. Some body parts are severely damaged in accidents some of which includes those parts which covers the vital organs like ribs, spinal cord, skull, and pelvis so stabilizing those parts is a risky task for paramedics and can even kill the patient.
How does abiotic and biotic factors influence an ecosystem?
Answer:
Los factores abióticos pueden definirse cuáles son los componentes físicos y químicos no vivos en el ecosistema. Mientras que los factores bióticos son los componentes vivos de un ecosistema. Tanto los factores bióticos como los abióticos influyen en la supervivencia y la reproducción
!!
4. Within aquatic biomes, there are many different
environments where different types of organisms
thrive. Phytoplankton, seaweed and other organisms
that perform photosynthesis live in the ocean waters
near the surface, but not in the deepest ocean waters.
Which statement about surface water is most useful
for explaining this observation? (17.2)
a. Only surface water is warm enough for
photosynthesis
b. Only surface water has sufficiently low salinity for photosynthesis
c. Only surface water has dissolved oxygen needed for photosynthesis
d. Only surface water has received enough sunlight for photosynthesis
Answer:
D
a. Maybe
b. Doesnt make sense really
c. doesnt make sense
D. Makes the most sense
3. What tools would you use to determine if a cell is from a plant or from an animal? Explain,
Answer:
Dont know
Explanation:
Lol
