All of the following are traits of echinoderms excepta. five-part radial symmetry.
b. a pair of antennae.
c. tube feet.
d. an internal skeleton.

Answers

Answer 1
Answer: skeleton is the answer
Answer 2
Answer:

The answer is actually B.) a pair of antennae


Related Questions

Theory of slow change over long time periods
What is happening when a person changes color?
Which kingdom includes the organism that causes lyme disease monera protista?
the secretion of which hormone is an example of a positive feedback mechanism? insulin estradiol parathormone catecholamines
(16)If a cell is fused with another cell which of the following would be the best example of a trans-mechanism of epigenetic control?Feeding a specific diet to female mice may result in an increased proportion of pseudoagouti offspring if In the Igf-2 allele, which chromosome is imprinted? Which is expressed? Match the following terms with their descriptions below.

Which is a key component of the energy molecule ATP? sodiumphosphorus

chlorine

sulfur

Answers

Phosphorus is a key component of the energy molecule ATP.

What does ATP stands for?

ATP stands for adenosine triphosphate, and it is a molecule that carries energy within cells.

The energy is stored in the phosphate bonds of ATP, and when these bonds are broken, energy is released for cellular processes such as muscle contractions, protein synthesis, and nerve impulses. The phosphorus atom is what makes the phosphate bond in ATP so high in energy, and this is what allows ATP to be such an effective energy carrier within cells.

The phosphate groups are linked by high-energy bonds, and when these bonds are broken, energy is released that can be used for various cellular processes.

The breakdown of ATP into ADP (adenosine diphosphate) and inorganic phosphate releases energy, while the formation of ATP from ADP and phosphate requires energy. The energy stored in ATP is used for various cellular processes such as muscle contraction, protein synthesis, and active transport across cell membranes.

Learn more about ATP at:

brainly.com/question/174043

#SPJ7

phosphorus 
ATP stands for adenosine triphosphate which means that there are 3 phosphates in each ATP. You'll learn later something called ADP which is adenosine diphosphate meaning 2 phosphates.

What dies survivor ship curve mean? What an easy way to remember what it means?

Answers

Survivorship curve = so, first of all, it's a curve, as in a graph.

It describes "survivorship" - the rate of survival, in other words: out of 100 organisms that are born, how many survive. This rate is different among species, for example, most humans live out to most of their life span, and almost all can survive well beyond a reproductive age.

However, in frogs for example, many many individuals are born, but only few can survive to adulthood: most die very young, before reproductive age.

So if you hear about a new species: let's say dogs, and you want to know how long they would live, you would look at their sirvivorship curve (and in some breeds of dogs, those that are likely not to be in shelters, but in homes, the survivorship curve would be similar as in humans: almost all individuals born can live long. 

10) What gas is a product of photosynthesis?

Answers

photosynthesis produce 02 (oxygen)

Briefly explain how gaseous exchange takes place in terrestrial plants.​

Answers

Answer:

Gaseous exchange, or respiration, is the process in which terrestrial plants take in oxygen from the air and release carbon dioxide. It involves a series of biochemical processes that take place within specialized cells embedded within the plant's leaves.

The first step of gaseous exchange in terrestrial plants is diffusion, where molecules move from an area of high concentration to an area of lower concentration. In this case, atmospheric oxygen diffuses into leaf cells through small openings on their surface called stomata. As these molecules enter the leaf cells, they are taken up by specialized photosynthetic organelles known as chloroplasts.

Chloroplasts then absorb energy from sunlight and use it to combine CO2 with water (H2O) to produce sugars and other organic compounds such as amino acids and lipids (photosynthesis). The resulting reaction produces chemical energy stored in the form of ATP (Adenosine Triphosphate). This ATP drives various metabolic pathways that use oxygen as well as glucose for cellular respiration. During this process, some oxygen enters the cell while some carbon dioxide is released back out into the atmosphere through small openings on their surface called stoma – completing the cycle of gas exchange between terrestrial plants and their environment.

Explanation:

Answer:
In terrestrial plants, gaseous exchange takes place through tiny openings called stomata on the surface of leaves. These stomata allow for the exchange of gases such as carbon dioxide and oxygen with the surrounding atmosphere. During photosynthesis, carbon dioxide enters the plant through the stomata, while oxygen produced during photosynthesis exits through the same openings. This process enables plants to obtain the necessary carbon dioxide for photosynthesis and release oxygen as a byproduct.

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

What other factors could have cause a decrease in the hare population

Answers

to many natural predators
to many hare's and not enough food source. No food=starvation=death.