BIOLOGY HIGH SCHOOL

The leaves of a plant appear to be green because light waves areA. reflected
b. absorbed
c. both absorb and reflected
d. neither absorb or reflected

Answers

Answer 1
Answer: i believe a reflected , because green light is not absorbed but reflected .
Answer 2
Answer:

Answer:

La respuesta es la B /The answer is B

Explanation:

La clorofila, el pigmento que hace que las hojas sean verdes, absorbe luz en las longitudes de onda violeta y azul y asimismo en el rojo; dado que refleja la luz verde, parece verde.

Chlorophyll, the pigment that makes the leaves green, absorbs light in the violet and blue wavelengths and also in the red; Since it reflects green light, it looks green.

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A lunar eclipse occurs when the Moon passes through Earth’s shadow. A lunar eclipse can only occur during a Select one:
a. full moon.
b. new moon.
c. first quarter moon.
d. last quarter moon.

Answers

Answer:

full moon

Explanation:

Final answer:

A lunar eclipse, which happens when the Earth comes between the Sun and the Moon, can only happen during a full moon. This is when the Moon is entirely illuminated by the Sun and occurs opposite the Sun in our sky, making it possible for Earth's shadow to cover it.

Explanation:

A lunar eclipse involves an alignment of the Earth, Moon, and Sun in a specific order. In this arrangement, the Earth comes directly between the Sun and the Moon, casting a shadow on the Moon's surface. This phenomenon can only occur during a full moon, as option 'a' correctly states. This is because during a full moon, the Moon is fully illuminated by the Sun and is opposite the Sun in our sky, which allows for the Earth's shadow to completely cover the Moon in certain instances, resulting in a lunar eclipse.

Learn more about Lunar Eclipse

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Which of the following statements accurately describes the phases of the menstrual cycle in humans?

Answers

A is incorrect, ovulation happens around day 14. B. is correct, during the luteal phase LH from the anterior pituitory gland stimulates the corpus lutem to secrete progesterone. C. is incorrect, the follicular phase is when FSH is released from the anterior pituitary. D is incorrect, the luteum is stimulated in the luteal phase.

Answer:

Progesterone in the blood is highest during the luteal phase

Explanation:

During which process is ethanol produced?A-lactic acid fermentation
B-alcohol fermentation
C-citric acid cycle
D-electron transport chain

Answers

Answer:

The correct answer would be B-alcohol fermentation.

Alcohol fermentation or ethanol fermentation is a type of anaerobic respiration by which organism (such as yeast) convert sugar such as glucose, sucrose et cetera into ethanol and carbon dioxide in order to produce energy.

First, glucose is converted into 2 molecules of pyruvate by the process of glycolysis. It leads to the formation of 2 molecules of ATP (adenosine triphosphate) and 2 molecules of NADH.

Then, two molecules of pyruvate are converted into two molecules of acetaldehyde with the help of enzyme pyruvate decarboxylase. Two molecules of carbon dioxide are released as a byproduct.

Lastly, two molecules of acetaldehyde are converted into two molecules of ethanol with the help of enzyme alcohol dehydrogenase. It consumes two NADH and regenerates two NAD⁺ lost during the process of glycolysis.

Hence, the net gain of alcohol fermentation is two ATP.

Thus, we can say that ethanol is produced during alcohol fermentation.

During alcohol fermentation ethanol is produced.

Alcohol fermentation involves the break down of sugars in organisms such as yeast to form ethanol or alcohol, carbon dioxide and release energy.

Further Explanation;

Anaerobic respiration

  • Anaerobic respiration on the other hand is a type of respiration that occurs in absence of oxygen gas.
  • It involves the breakdown of organic compounds to form small amount of energy in the form of ATP and ethanol or lactic acid as byproducts.

Alcohol fermentation

  • Alcohol fermentation is a type of anaerobic respiration where an alcohol is formed as a byproduct.
  • During alcohol fermentation organism such as yeast convert sugars such as glucose, sucrose into ethanol and carbon dioxide in order to produce energy.

Stages of Alcohol Fermentation

Glycolysis;

  • One glucose molecule is broken down to pyruvate and two molecules of ATP are formed. This leads to generation of two molecules of ATP and two molecules of an energy carrier NADH.

Fermentation;

  • Pyruvate from glycolysis is converted to ethanol.
  • This occurs in two steps

Step 1

  • Pyruvate is first converted into two molecules of acetaldehyde, which is catalyzed by the enzyme pyruvate dehydrogenase and two molecules of carbon dioxide are released as byproduct.

Step 2

  • Acetaldehyde is then converted into ethanol by the enzyme alcohol degydrogenase which consumes the two molecules of NADH and regenerates NAD+ used during glycolysis.

Keywords: Anaerobic respiration, Fermentation, alcohol fermentation, Glycolysis, steps involved in alcohol fermentation

Learn more about:

Level: High school

Subject: Biology

Topic:  Respiration

Sub topic: Alcohol fermentation

gentoo penguins will present a mate with a pebble that they find to attract a mate. emperor penguins have a specific call and movement that they make to attract a mate. which type of isolation do these penguins demonstrate?

Answers

The answer is behavioral isolation.

Reproductional isolation is a way to prevent closely related species to mate each other. This is due to reproductive barriers which can be either prezygotic (before fertilization) and postzygotic (after fertilization) barrier. Behavioral isolation is an example of postzygotic barrier. It is based on behavior, including mating sounds and rituals. Thanks to behavior isolation, the different species (in this example gentoo penguins and emperor penguins) will have different mating rituals so they could attract only individuals of their own species, respectively.

Animals in the tundra struggle to find food and keep warm. true or false.

Answers

Answer:true

Explanation: just took the test

I'd argue for false.

Animals living in cold conditions have a small SA:Volume ratio, what decreases the heat loss to the surrounding.

These animals would have also adapted to finding various sources of food, otherwise they would go extinct.

By what reproductive mechanism does a haploid animal grow?initially by mitosis and then by meiosis
completely by mitosis
completely by meiosis
initially by meiosis and then by mitosis

Answers

Answer:

The correct answer would be completely by mitosis.

Mitosis is a type of cell division in which a parent cell divides into two daughter cells each with the same type and number of chromosomes as present in the parent cell.

Before cell division, the cell undergoes growth and replicates or doubles its genome.

The process of mitosis is usually divided into four phases prophase, metaphase, anaphase, and telophase.

It helps in the growth and repair of the cells or tissues in multi-cellular organisms.

Initially, a haploid animal grows by mitosis and then by meiosis. The correct option is 1.

In their lifecycle, haploid animals alternate between haploid and diploid stages.

A haploid animal grows at first through mitosis, in which the haploid cells divide to become more numerous. By creating exact replicas of the initial haploid cells, mitosis enables the organism to grow and develop.

After beginning to grow, the haploidanimal goes through meiosis, a particular kind of cell division, to create gametes (eggs or sperm). Meiosis causes the number of chromosomes to be cut in half, resulting in the production of haploid cells from diploid cells.

These haploid cells act as the reproductivecells that join together during fertilization to transform the ensuing zygote back into a diploid organism.

Thus, the correct option is 1.

For more details regarding reproductive cells, visit:

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Your question seems incomplete, the probable complete question is:

By what reproductive mechanism does a haploid animal grow?

  1. initially by mitosis and then by meiosis
  2. completely by mitosis
  3. completely by meiosis
  4. initially by meiosis and then by mitosis
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