All animals that swim freely in the ocean are known as...?

Answers

Answer 1

Answer: the answer is nektonAnswer here

Answer 2

Answer: this answer includes animals and plants : phytoplankton

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Is this statement true or false?All organisms have a closed circulatory system.

A.
True

B.
False

Answers

Annelida are segmented warms that developed a straight and complete digestive system, and close circulatory system. The statement is TRUE.

What are annelida characteristics?

Annelida are the segmented warms than has been include terrestrial and the aquatic species. They characterize for the having their bodies segmented into equal parts linearly arranged along the anteroposterior ax.

Their digestive system has the straight, going from the mouse in the anterior region to the anus in the posterior region. It has been located in the center of the coelom, being held by the septums. Digestion has the extracellular. Excretion is done through nephridium.

Annelida have the well-developed closed circulatory system, in which the blood remains and the flows in vessels. The statement Members of phylum annelida have a closed circulatory system and a complete digestive system is TRUE.

You will learn more about annelida at

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all organisms do have a closed circulatory system
so A

If the first hill is 20 cm high, the second hill is 0 cm high, and the last hill is 0 cm high, how long does it take the 50 g car to reach the egg?

Answers

The answer is undefined.

To get how long it takes the 50 g car to reach the egg, the speed is required. Distance is provided from the height of the hills.

Formula to get the time is:

T = D/S
Time = Distance / Speed

For example, given that the distance is 20 cm and the speed of the 50 g car is 2 cm/s

T = 20 cm / 2 cm/s
T = 10 s

The 50 g car will take only 10 seconds to travel.

Answer:

2.45s

this is the answer because i got it right on a test

Which macromolecule includes steroids

Answers

Answer:

Steroids belongs to the group of lipids. This a biologically active substance(organic molecule) which has four rings arranged in a specific molecular configuration.

They are chemically lipids because they are insoluble in water because they are hydrophobic.

Cholesterol is the most common kind of steroid which is known to be the precursor to vitamin D.

Lipids, Although there is four classes of macromolecules that constitute all living matter: Carbohydrates, Lipids, Proteins, and Nucleic acids. Best answer i'd go with is, Lipids.

Darwin often used the phrase "_[blank]_" to suggest that species must have descended from preexisting species and that changes in the species took place over long periods of timeon the origin of species

descent with modification

descent with differential reproduction

survival of the fittest

Answers

Answer:

Descent with modification

Explanation:

Darwin proposed the phrase "descent with modification" to explain that evolution of new species occurs when existing species accumulate genetic variation over the period of time.

Accordingly, the process of accumulation of genetic variations to get better adapted to the surroundings is followed by natural selection of individuals with beneficial adaptations that impact survival advantage to them. These individuals transmit the adaptations to their progeny.

Gradually, the process leads to the evolution of new species which differ from parental species in having the individuals carrying the beneficial adaptations.

The answer is descent with modification.
Descent with modification practically means that a species have changed appearance wise over long periods of time to adapt to their environments better.

Glucose is broken down in different ways both in the presence and in the absence of oxygen.Using the table for reference, which reaction precedes each member of the reaction set in column one?
Reaction set Preceded by
glycolysis A
Krebs cycle B
ETS C
lactic acid fermentation D

A.
A. photosynthesis in plants
B. glycolysis
C. glycolysis
D. Krebs cycle

B.
A. glycolysis
B. Krebs cycle
C. photosynthesis in plants
D. glycolysis

C.
A. glycolysis
B. Krebs cycle
C. glycolysis
D. Krebs cycle

D.
A. photosynthesis in plants
B. glycolysis
C. Krebs cycle
D. glycolysis

Answers

For the given reaction set:

Glycolysis (A)
Krebs cycle (B)
ETS (C)
lactic acid fermentation (D)

Each of the elements of the reaction set is preceded by corresponding elements of set D which consists of:

A. photosynthesis in plants
B. glycolysis
C. Krebs cycle
D. glycolysis

To summarize the order of the reactions:

photosynthesis in plants > glycolysis > Kreb's cycle (aerobic respiration) or lactic acid fermentation (anaerobic respiration) > Electron Transport Chain (ETC)

Aerobic respiration:
Photosynthesis produces glucose, which is used in glycolysis. Glycolysis produces ATP, NADH, and pyruvate. Pyruvate is then used in the Kreb's cycle to produce NADH, FADH2, ATP, and CO2. The ETC then uses the NADH and FADH2 to produce energy.

Anaerobic respiration:
The same process is followed until glycolysis. The pyruvate produced from glycolysis is used in the lactic acid fermentation process to produce lactic acid.

Correct answer is

A. NAD+

B. ATP

C. Pyruvic Acid, ATP, NADH

D. ATP, FADH2, NADH

A patient with ovarian cancer has a series of blood tests done. The alpha fetoprotein level is high. Which of thefollowing statements is TRUE regarding this level?

A. The high alpha fetoprotein level indicates that the cancer is responding well to treatment.

B.The higher the level, the more advanced the cancer

C.The lower the level, the more advanced the cancer

D.The high alpha fetoprotein level is normal and has no relationship to the cancer

Answers

Answer:

B.The higher the level, the more advanced the cancer

Answer:

B.The higher the level, the more advanced the cancer

Explanation:

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In the image, two cookies are used to model tectonic plates. Which plate boundary does this model represent? A.) Convergent Boundary C.) Transform boundary D.) none of these

Which is an example of a population? A.all the red tailed foxes in the meadowB.all of the individuals making up a speciesC.each goose in a gaggle of geeseD.one blade of grass in a prairie