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devlian [24]
3 years ago
5

21. Which of the following is not a feature of echinoderms? tube feet body segments radial symmetry endoskeleton

Biology
2 answers:
Jlenok [28]3 years ago
4 0

Answer:

Explanation:

body segements

Brut [27]3 years ago
4 0

Answer:

Option). segments.

Explanation:

Echinoderms are marine organisms that belong to phylum Echinodermata. These organisms are characterized by tube free (tentacle-like structures), radial symmetry, and endoskeleton, which is made up of calcium carbonate.

Echinoderms have non-segmented bodies, means they are asegmented organisms.

Thus, the correct answer is 'segments.'

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3 years ago
List and describe three factors that affect how quickly enzymes can work to catalyze reactions
Lilit [14]

Answer:

The correct answer is - temperature, pH, substrate concentration.

Explanation:

Various factors affect the rate of enzymatic reaction such as pH, temperature, substrate concentration, availability of activators or inhibitors in the reactions, and enzyme concentration.

Temperature: Temperature affects the rate of the enzyme-catalyzed reactions. Like most of the reactions with an increase in temperature rate of enzymatic reaction also rises up to a maximum level and then declines if the temperature continues to increase as enzyme denatures after a particular temperature.

pH: Similar to the temperature pH also increases the rate of reaction up to a maximum level and then declines the rate as every enzyme acts only at an optimum pH range.

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2 years ago
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Rom4ik [11]

Answer:

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Explanation:

Those three features best describes a palm tree, they are angiosperms because they produces seeds and flowers

4 0
3 years ago
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What's the name for the process about how the thermal energy moves in<br> the ocean?
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7 0
3 years ago
Marfan syndrome is a dominant trait. A cross between a homozygous dominant and a heterozygote would produce what phenotypic rati
umka2103 [35]

Answer:

The correct answer is- 4:0

Explanation:

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Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.  

                                   S      s

                              S  SS   Ss

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Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.

                       

3 0
3 years ago
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