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Answer:

Oxygen exits the leaf

Explanation:

Photosynthesis is the process whereby green plants and other certain organisms manufacture their own food using sunlight as an energy source. The photosynthetic process makes use of carbon dioxide and water to produce glucose (sugar) and oxygen.

Water and carbon dioxide must first be taken in by the plants from the soil and atmosphere respectively in order to perform the process. Glucose is produced as the main product while oxygen is produced last as a waste product of the process. Hence, the EXIT OF OXYGEN FROM THE LEAF is the last thing that occurs in photosynthesis.

Answer:

The new study is the first to distinguish between bodies of water with low and high levels of oxygen. It shows that poorly oxygenated waters did not support the complex life that evolved immediately prior to the Cambrian period, suggesting the presence of oxygen was a key factor in the appearance of these animals.

(science daily)

Explanation:

Answer: straight line. Once it hits an object, then it bends.

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Answer:

im pretty sure its a

Explanation:

Answer:

2.41 × 10^24 molecules

Explanation:

To calculate the number of molecules of a substance (nA), we multiply the number of moles of such substance (n) by Avagadro's number or constant, which is 6.02 × 10^23.

That is; nA = n × 6.02 × 10^23.

In this question, 4 moles of glucose were given. The number of molecules in 4 moles of glucose is as follows:

nA = 4 × 6.02 × 10^23

nA = 24.08 × 10^23

nA = 2.41 × 10^24 molecules.

Answer:

b

Explanation:

not sure how to explain.

Answer:

it is either eco or community ecology

Explanation:

Answer:

B . Females produce fewer gametes.

Explanation:

The option that correctly describes a difference between the male and female reproductive systems is B. Females produce fewer gametes.

The reproductive system is a collection of organs and tissues that work together to produce, transport, and fertilize gametes (sperm in males and eggs in females) to facilitate reproduction. In males, the reproductive system includes the testes, epididymis, vas deferens, seminal vesicles, prostate gland, and urethra.

Sperm are produced in the testes, mature and are stored in the epididymis, and then transported through the vas deferens and mixed with seminal fluid produced by the seminal vesicles and prostate gland before being ejaculated through the urethra during sexual intercourse. In females, the reproductive system includes the ovaries, fallopian tubes, uterus, cervix, and vagina.

Eggs are produced in the ovaries and are transported through the fallopian tubes, where fertilization can occur. The fertilized egg then implants in the uterus, where it can develop into a fetus. Hormones, such as estrogen and testosterone, play important roles in regulating the reproductive system and maintaining sexual characteristics.

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Answer:

Raccoons, ducks, geese, and swans visit ponds. There are many smaller animals as well. Frogs, toads, and many insects begin their lives in ponds and live nearby after they are grown. Turtles, snakes, rats, salamanders, worms, and spiders can also be found

Answer:

The control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels.

Explanation:

have an good day

Answer:

Carrying capacity is the maximum number of individuals that the environment can support over a long time period

Explanation:

Answer:

The prevailing theory proposes that people migrated from Eurasia across Beringia, a land bridge that connected Siberia to present-day Alaska during the Last Glacial Period, and then spread southward throughout the Americas over subsequent generations.

Explanation:

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Answer:

Explanation:The Beringia land bridge, which had developed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum, is generally recognized as the point at which Paleolithic hunter-gatherers reached North America from the North Asian Mammoth steppe.

Answer: b

Explanation:

Based on these criteria, the watershed that contains the healthier stream is, that both streams are equally healthy. The correct option is B.

An abiotic factor is a non-living component of an ecosystem that influences its surroundings. Temperature, light, and water are all components of the terrestrial environment.

Abiotic elements in a marine ecosystem include salinity and ocean currents. Abiotic and biotic forces interact to form a distinct ecosystem. Abiotic influences are found in all non-living components of an ecosystem.

They are often made up of both physical and chemical components. Abiotic factors are nonliving components of an ecosystem that influence the environment. Temperature, light, and water are among the examples. Abiotic elements in a marine ecosystem include salinity and ocean currents.

Therefore, the correct option is B. Both streams are equally healthy.

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Answer:

i hope it helps

mapriend

Answer:

before puberty begins

Explanation:

because on your menstrual cycle the blood clots are actually pieces of uterus and that's actually your uterine shedding and it usually starts doing that even before your period begins so it definitely be before puberty begins hope I didn't make the answer to awkward but that's the truth LOL

The periodic shedding of the uterine lining usually takes place  before puberty begins​. The correct option is D.

Thus, An egg is released from the ovary into the fallopian tube during ovulation, which happens roughly halfway through a woman's menstrual cycle. The uterine lining that was developed to support a potential pregnancy is no longer required if fertilization of the egg by a sperm does not take place.

The uterine lining sheds as a result, causing menstruation, often known as the monthly menstrual cycle. In a typical 28-day menstrual cycle, this shedding typically takes place around 14 days following ovulation.

In females of reproductive age, menstruation is a normal process that lasts until menopause, at which point it ceases. Menstruation is a component of the menstrual cycle.

Thus, The periodic shedding of the uterine lining usually takes place  before puberty begins​. The correct option is D.

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Answer:

Water circulates in a cycle across the hydrosphere. Clouds gather water, which then falls to Earth as rain or snow. Rivers, lakes, and seas store this water. Then it evaporates back into the atmosphere, restarting the loop.

Explanation:

Answer:

The hydrosphere is the part of Earth were all the water is contained.

The atmosphere is the part of Earth were all the gases are contained.

These two are related because the hydrosphere is inside the atmosphere.

The hydrosphere goes down below sea level, because of several trenches and other holes like the Mariana trench. The hydrosphere also goes around 20 kilometres in the air because of clouds.

Answer: В.

China

Explanation:

Plants and insects store their sugar in form of starch.

Answer:

Decay adds carbon to the atmosphere.

Substrate molecules binds to enzymes active site that matches its own and forms a complex called the enzyme-substrate complex yielding products that eventually detaches from the enzymes.

The state in which substrate molecules do not find any free active site is called saturation (option b).

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Answer: . An organelle (think of it as a cell's internal organ) is a membrane bound structure found ... There are actually two different endoplasmic reticuli in a cell: the smooth ... which project into the extracellular space and act like a name tag for the cell.

Explanation:

Answer:

Messanger RNA

Explanation:

Messenger RNA carries instructions from the nucleus to the cytoplasm. The other two forms of RNA, ribosomal RNA and transfer RNA are involved in the process of ordering the amino acids to make proteins. RNA is a nucleic acid, like DNA, but differs slightly in its structure.

Answer:

Genetic contamination,  competition with natural species, creating potential for problematic pathogens,  unwanted side effects and  unfavorable level of diversity.

Explanation:

The possible risks and drawbacks of the use of genetic engineering are genetic contamination,  competition with natural species, creating potential for problematic pathogens,  unwanted side effects and  unfavorable level of diversity. These drawbacks puts pressure on the native species and due to competition with natural species, removal of natural species occurs. There are many side effects of genetic engineering species on the health and ecosystem.

Answer:

A. Recessive

Explanation:

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Answer:

During hypnosis, the scientists found, a region of the brain called the dorsal anterior cingulate cortex became less active. Studies have found that that region helps people stay vigilant about their external environment. ... The activity in their dorsal anterior cingulate cortex may account for that behavior, too.

Answer:

The correct answer is -

1. First Quarter Moon, 2. Waxing Gibbous Moon, 3. Full Moon, 4. Waning Gibbous Moon, 5. Third Quarter Moon, 6. Waning Crescent.

Explanation:

The lunar cycle goes through eight different phases during the time period of 29.53 days while revolving around the earth. These phases move from new moon to full moon and then full moon to again new moon. The four major phases are New moon phase, the first quarter phase, the full moon, and the third or last quarter phase.

In this diagram, there are 1. First Quarter Moon, 2. Waxing Gibbous Moon, 3. Full Moon, 4. Waning Gibbous Moon, 5. Third Quarter Moon, 6. Waning Crescent. in order occurs.

Answer:

D

Explanation:

Antibodies

Answer:

did it on khan academy :)

Answer:

The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.

Explanation: hydrogen bonds

Answer:

Homeotic genes are responsible for determining the identity of particular segments or structures of the body.

Explanation:

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