Answer:
Darwin conducted an experiment with breeding pigeons.
Explanation:
The pigeons provided the perfect animal to test his theory of selection for quite a number of reasons including its trait diversity from wing structures to color patterns to size to flight patterns. From these experiments he concluded that by natural selection of randomly occurring traits that make species better suited for survival and reproduction, evolve in the astounding diversity of organisms on Earth today.
(not my words)
Answer:
its b
Explanation:
What is the function of protein channels in the cell membrane?
O to stabilize the membrane
it forms the main structure of the membrane
to transport substances that cannot pass through the lipid bilayer
span the entire membrane and act as recognition for the cell
Answer:
They transport substances that cannot pass through the lipid bilayer
Explanation:
Answer:
They transport substances that cannot pass through the lipid bilayer
Explanation:
Microbeads are tiny, smooth, plastic spheres found in common household products such as facial soap. These beads, measuring from 0.0004 to 1.24 mm, roughly the size of some fish eggs, are too small to be removed by water treatment systems. Thus, they end up in rivers, lakes, and other bodies of water. The accumulation of these microbeads is an environmental concern for aquatic biologists because microbeads
(1) make the lakes and rivers cloudy and dirty, affecting their appearance
(2) may stick to some household water pipes, preventing drainage problems
(3) could be mistaken for food by some species, working their way up the food chain
(4) could clog fishing nets, affecting the ability of fishermen to catch fish
Answer:
(3) could be mistaken for food by some species, working their way up the food chain
Explanation:
Microbeads, such as other microplastics, can affect wildlife in many ways, but mostly by
IngestionIntroduction and transference in the trophic webInteraction with other contaminantsMicroinvertebrates, bacteria, and viruses colonize these microplastics and can be transported long distances.Organisms like mollusks, crustaceans, fishes, birds, turtles, among many others, might confuse these elements with food and eat them. Microbeads might float or accumulate in sediments and be ingested by different benthonic species. The ingestion of microbeads by inferior links in the trophic web means a direct entrance in the trophic web where many superior links are affected too while feeding with already contaminated prey.
The ingestion of microbeads can cause a significant impact on the growth, development, and reproduction of freshwater and seawater species.
Microbeads, like other microplastics, characterize for their durability in time and resistance, which means that the ones that are already in the oceans and rivers will last there for centuries.
Biologists expect that all cells come from other cells because of the
Hooke
cell theory
endosymbiosis theory
osmosis
Answer:
Hi, there the answer is cell theory
Explanation:
Which can more efficiently supply nutrients and
expel waste products?
A. larger cells
B. smaller cells
C. cells with lower surface area to volume ratio
D. cells shaped like a cube
Answer:
Smaller Cells
Explanation:
Basically, small cells have larger surface area but smaller volume, its vice versa for larger cells.
Not to forget that the functions of a cell are related to the diffusion, osmosis and active transport movement.
Factors to consider for a faster diffusion/ osmotic movement includes:
Surface Area
Size of molecule
Difference in concentration gradient
Temperature
Distance
So as per the factors, when there is a larger surface area, the rate diffusion/ osmosis increases hence increasing its efficiency.
Compare all the organisms. What trend do you
see?
Relative Proportions (%) of Bases in DNA
Organism
А
T
G
С
Human
30.9
29.4
19.9
19.8
The proportions of DNA bases vary greatly
among organisms.
The proportions of DNA bases are similar in
closely related organisms, but different in
organisms that are not closely related
The proportions of DNA bases are similar
among all organisms.
Chicken
28.8
29.2
20.5
21.5
Grasshopper
29.3
29.3
20.5
20.7
Sea urchin
32.8
321
17.7
173
DO NE
Wheat
27.3
27.1
22.7
22.8
Yeast
31.3
32.9
18.7
17.1
का
E Coli
24.7
23.6
26.0
25.7
)
Answer:
28.8 i got it right in the test :)
How does the skin regulate body temperature?
Group of answer choices
by increasing sweat production
by producing vitamin D
by retaining water
by regulating fat content in the epidermis
How does the skin regulate body temperature?
[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Answer.}}}}}∘[/tex]
A. by increasing sweat production. ✔
Explanation:-
The sweat glands present in the skin helps to cool the skin as it produces sweat.Sweat glands keeps the body temperature at approximately 37° C by releasing sweat in a hot environment or during physical exertion.[tex]\bold{ \green{ \star{ \orange{Mystique35}}}}⋆[/tex]
how does the mitochondria lysosomes and golgi apparatus work together
Answer:
The mitochondria segregate the Golgi from lateral regions of the plasma membrane, the nucleus, and the cytoplasm. The mitochondria and the golgi structures from very close contacts, and these contacts remain stable over time.
where does pollination takes place in the flower
Answer:
To be pollinated, pollen must be moved from a stamen to the stigma. When pollen from a plant's stamen is transferred to that same plant's stigma, it is called self-pollination. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination.
Explanation:
When a single species, such as ancestor of the Galapagos finches, has evolved into several different forms that live in different ways we say that_ has occurred.
A.adaptive radiation
B.coevolution
C.mass extinction
D.punctuated equilibrium
Answer:
A
Explanation:
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, alters biotic interactions or opens new environmental niches.
In the lab activity, you will use a chemical called a pH indicator that changes color as the pH of a
solution changes. If you added a pH indicator to two different solutions and they both turned the
same color, what would this tell you about the pH of each solution?
ph indicator is used to find the acidic or basic nature of a mixture.
there is a range of colours from red to blue
red colour indicates that solution is acidic and blue colour indicates that solution is basic
if two solutions have same colour that means they also have same ph value
What is phylogeny?
A. How species interact with each another
B. The study of cells.
C. How organisms are related through evolution.
Answer:
Hey mate......
Explanation:
This is ur answer......
C. How organisms are related through evolution...Hope it helps!
Brainliest pls!
Follow me! :)
Answer:
C. How organisms are related through evolution.
Explanation:
Phylogeny is the organisms that are related through evolution.
What was the environmental factor MAINLY responsible for the changes which were seen in the graph in Figure 3?
Answer:
my answer
Explanation:
the sun is rising in noon and at it's very height, carbon-dioxide levels are LOW because the more sunlight plants get, THE MORE PLANTS CONVERT SUNLIGHT WITH CARBON DIOXIDE INTO OXYGEN AND REMOVE CARBON DIOXIDE FROM ATMOSPHERE
Answer:
it seems that there aren't any factors that can really support it but i would say that the percent seems to lower because of the temp change
Explanation:
Who first used the word “atomos” to describe the smallest unit of a substance?
Answer:
Democritus
Explanation:
Democritus was a Greek philosopher and is still remembered for his contribution towards the atomic structure of the universe. He first described the smallest unit of a substance and named it as "atomos".
Answer:
Democritus is correct
Explanation:
What food provides for our cells
Answer:
“All four diets,” states Leung, “emphasize eating plenty of fruits, vegetables, whole grains, and plant-based protein and limiting consumption of sugar, sodium, and red and processed meat.”
Explanation:
Hope It helps
what happens to the energy that is not converted to usable energy in a muscle Cell?
Answer:
The process is called oxidative phosphorylation and it happens inside mitochondria. In the matrix of mitochondria the reactions known as the citric acid or Krebs cycle produce a chemical called NADH. NADH is then used by enzymes embedded in the mitochondrial inner membrane to generate adenosine triphosphate (ATP).
Explanation:
Domain is the least inclusive group of all of the categories.
A. True
B. False
Answer:
B. False
Explanation:
Within this hierarchy, living things are organized from the largest, most-inclusive group (domains) down to the smallest, least-inclusive group (called species). Domain: Domains group organisms by fundamental characteristics like cell structure and chemistry. The three domains are Bacteria, Archaea, and Eukarya.
Answer:
B. False
Explanation:
Domain is not the least inclusive group of all of the categories. The three domains are Bacteria, Archaea, and Eukarya.
Evidence overwhelmingly suggests that all life on earth is related.
A. TRUE
B. FALSE
Answer:
true
hope helpful answer
The state of maintaining a stable internal environment regardless of changing external conditions is called
The state of maintaining a stable internal environment regardless of changing external conditions is called [tex]\boxed{ homeostasis }[/tex].
[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}[/tex]
List the characteristics that describe the plant kingdom?
They are eukaryotic and multicellular.
Their cells have cellulose walls.
Majority have transport system.
They have photosynthesis hence autotrophic.
Reproduction is both asexual and sexual.
They show alternation of generation.
Please help, I need it fast!!!
Answer:
Question 1
B
Question 2
A
Question 3
i don't know this answer, sorry
Question 4
C
NO LINKS PLEASE
Why is the tortoise breeding program on Santa Cruz Island important?
O A. The tortoise population has increased.
O B. No one knows how long a tortoise's lifespan is.
O C. No one knows how two tortoise species became extinct.
O D. The tortoise population has decreased.
Answer:
The answer to the question is option D
List two functions of the skeleton (2)
Answer
The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals. The skeletal system is also called the musculoskeletal system.
Explanation:
The kidneys are organs that are involved in which process in mammals?
A synthesis
B excretion
C respiration
D transport
Answer: B
Explanation: The kidneys are part of the urinary system. Urinating is excreting. (God that word is so weird)
Indicate whether the statement is true or false.
This is Ag work please answer correctly
____ 1. Plants are used directly and indirectly to meet human needs
____ 2. A steer is a female cow that has given birth
____ 3. You have to live on a farm to be an FFA member
____ 4. We believe are the first two words of the FFA creed
____ 5. Thank you notes are required to get a job
____ 6. Only female turkeys gobble
____ 7. A first year FFA member is called a Greenman
____ 8. To be in FFA you have to be in an Agriculture class
____ 9. It is okay to let a non FFA member wear your FFA jacket
____ 10. You have to be in FFA to have an animal project
____ 11. It is okay to leave blanks on a job application
____ 12. A male turkey is called a Tom
____ 13. While in FFA official dress it is acceptable for makes to wear khaki pants
____ 14. A cow is a ruminant animal
____ 15. Cows have only one stomach compartment
____ 16. Turkeys grow to full maturity in about 4 to 5 months
____ 17. The FFA is only in the state of Texas
____ 18. The FFA emblem plow stands for labor and tillage of the soil
____ 19. There are 3 paragraphs in the FFA creed
____ 20. A turkey under sixteen weeks of age is called a roaster
____ 21. Wild turkeys are white in color
____ 22. Freeze branding is the only way to identify cattle
____ 23. A job application is one of the first barriers that you encounter before you are employed
____ 24. The gestation period of cattle is only 3 months
____ 25. Domesticated turkeys cannot fly
____ 26. A T-bone steak is considered a by- product
____ 27. The official colors of the National FFA are blue and gold
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 28. Which act established vocational agriculture courses in 1917?
____ 29. What did FFA stand for before it was changed?
____ 30. The official colors of the FFA are
____ 31. How should the FFA jacket be worn?
____ 32. List the parts of the FFA emblem
____ 33. Plants impact what environmental factors?
____ 34. When measuring a horse 1 hand= _____ inches
____ 35. Who wrote the FFA creed?
____ 36. What provides the foundation of the FFA emblem?
____ 37. The FFA emblem has how many symbols?
____ 38. The highest FFA degree members can earn is…
____ 39. The first line of the FFA motto is
____ 40. List the official Dress for females
____ 41. What are the last few words of the first paragraph of the FFA creed
____ 42. In ___________ the FFA opened membership to girls
____ 43. ______ believe in less dependence on ________ and more power in bargaining
____ 44. The Symbol on the FFA Emblem that signifies Labor and tillage of the soil is
____ 45. What does polled mean?
____ 46. breeds of cattle are known for milk production
____ 47. What do you call a neutered male cow?
____ 48. What do you call a male sheep or goat that has been castrated when its young?
____49. Swine breed most used for pets
____ 50. The most popular goat breed used for FFA projects
Answer:
1True
Explanation:
Because plants and animals are in various relation. example Food air and e.c.t.
48. How do matter and energy differ within a
community? Use the words recycle, trophic level,
and flow in your answer. (2.4-2.6)
Answer:
47.. in this case , the longer the food chain , the less energy is available for the rest of the members of the food chain. this indicates that a food chain with 15 trophic levels contain an energy that is insufficient to sustain all its members
48...Matter is cycled through the ecosystem in the biogeochemical cycles. ... However, energy is not recycled, but it flows into the ecosystem through the feeding relationships between the organisms in different trophic levels.
49.. (a) ...Urban development can magnify the risk of environmental hazards such as flash flooding. Pollution and physical barriers to root growth promote loss of urban tree cover. Animal populations are inhibited by toxic substances, vehicles, and the loss of habitat and food sources.
Explanation:
❣️(◍Jess bregoli◍)❣️#keep learning!!
Humans use special body parts for functions such as breathing and breaking down food. Some living things, such as bacteria, are too small to perform these functions. True false Submit
Answer:
False
Explanation:
Bacteria do not have organs like humans. However, bacteria have specific structures to perform certain essential functions.
Among the bacteria, there are the respirators, which perform aerobic cell respiration, where oxygen gas is the final acceptor of hydrogen ions. Also, some bacteria perform anaerobic cell respiration. In those, oxygen gas is replaced by other molecules, which function as hydrogen acceptors such as nitrates or sulfates. Bacteria respiration occurs through the mitochondria.
In addition, bacteria can have different forms of "obtaining food"
Some can obtain their food through photosynthesis, degrading organic compounds. Other types of bacteria use the energy released in oxidation reactions of inorganic compounds, such as those that participate in the nitrogen cycle.
Finally, there are saprophagic bacteria, which obtain food from corpses and the remains of living beings, and the parasite ones, which find this food in the tissues of living beings, often causing them illness.
What does the thyroid gland, shown in the image below, do?
(Pineal, Hypothalamus,
and Pituitary glands)
Thyroid
Thymus
Adrenal
Pancreas
Ovaries (2)
Tostos (2)
A. Releases a hormone if blood calcium levels get too high
B. Releases hormones to regulate the endocrine system
C. Regulates the pituitary gland
D. Releases insulin if blood sugar levels get too high
The thyroid gland secretes the thyroid hormones that releases a hormone if blood calcium levels get too high and in this way regulats the calcium level in the blood that is present in option A.
The thyroid gland plays a crucial role in regulating metabolism, which is the process by which the body converts food into energy. Metabolism is a complex process that involves various chemical reactions that take place within the body's cells. The thyroid hormones T4 and T3 are responsible for regulating many aspects of metabolism such as thyroid hormones increase BMR, which means that the body burns more calories even when one is not doing any physical activity.
learn more about the thyroid hormones here.
https://brainly.com/question/29848027
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Which of the following can cause evolution to occur? (Select all that apply)
Mutation
If organisms choose a mate for a specific reason
People moving into or out of an area
If the population shrinks
Answer:
MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinksExplanation:
These factors are the "forces of evolution." There are four such forces: mutation, gene flow, genetic drift, and natural selection.
These are the factors that can cause evolution to occur:
MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinksIdentify what holds DNA, the hereditary information of a cell?
(Its not the nucleus)
PLEASE HELP!
Answer:
Could be chromatin or maybe chromosomes
What causes the formation of a cervical plug a testorone b progesterone c luteal d estroge e follicle
Answer:
b progesterone
Explanation:
The plug is formed as soon as there is implantation of fertilized eggs. The thickness of the cervical mucus becomes different as hormone levels changes in pregnancy.
The progesterone, encourages the production of thick fluid/ mucus which brings about the formation of a plug. This prevents bacteria from getting into the uterine cavity.
Answer: The correct option is B (progesterone).
Explanation:
The cervix is the ring of muscles also called the neck of the uterus in female reproductive system. This protrudes through the anterior wall of the vagina, opening into it at the external os.
After the fertilization of the ovum by the spermatozoa, the uterus prepares for the implantation which results from the secretion of hormones. Under the influence of oetrogen, secreted by the developing follicle, the cells of the endometrium divide rapidly causing the endometrium to build up and thicken.
While the viscosity of cervical mucus changes in response to hormone levels and during pregnancy, progesterone fosters the production of highly viscous mucus resulting in the formation of a plug that forms a physical barrier to bacteria and prevents their ascension into the uterine cavity. This plug is called CERVICAL PLUG.