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Alla [95]
1 year ago
8

All of the following are characteristics of modern amphibians except:

Biology
1 answer:
Tom [10]1 year ago
4 0

Answer:

Endothermic

Explanation:

Amphibians are ectothermic organisms. Ectothermic animals are coldblooded animals. From the options above, the correct answer is endothermic because amphibians are not hot blooded and are never endothermic.

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Which curve shows the course of the reaction in the presence of an enzyme--the black curve or the red curve? Which line represen
nikklg [1K]
I found the attached image on the internet and it really helps complete this exercise.

First question:
In the presence of an enzyme, the course of the reaction is shown by the red curve. The necessary energy to make a reaction occur is less when there is an enzyme to help the reaction happen. Enzymes work as catalysts that act over substrates converting them into different molecules in a much accelerated way then it would happen without the enzyme's help, if it would happen at all.

Second question:
The activation energy is represented by line B. The activation energy is the energy needed to be available for a reaction to happen. If we compare it with line A, which represents the activation energy necessary for a reaction without an enzyme, we can see how much less energy is necessary to dispend when an enzyme is part of the reaction. Line C represents the energy resultant from the reaction.

3 0
1 year ago
Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offsprin
Svet_ta [14]

Answer by YourHope:


Hello fellow army~


According to the Punnett square for this cross, what percentage of offspring is predicted to have blue feathers?


The answer is 50% ♡♡♡


^-^

3 0
1 year ago
Read 2 more answers
Suppose that of a cohort of 150 mice in a mouse colony born in February, 125 are still at the end of March and 115 are still ali
kogti [31]

Answer: Survival rate up to start of April = 76.67%

Explanation: size of colony = 150mice.

Size of colony in February =125mice.

Size of colony in march = 115 mice.

1. Survivorship rate in February

= Size of colony / size in February *100.

= 122 / 150 * 100

= 83.33% to the nearest hundredth

2. Survivorship rate in march

= Size of colony / size in march *100.

= 115/150 * 100

= 76.67% to the nearest hundredth.

5 0
1 year ago
Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions?
dlinn [17]

In the citric acid cycle (also known as Kreb’s Cycle), the enzyme that catalyzes oxidative decarboxylation reactions is α-Ketoglutarate dehydrogenase. The oxidative decarboxylation reaction is the irreversible stage of the citric acid cycle; it generates NADH (equivalent of 2.5 ATP), and regenerates the 4C chain (CoA is excluded).

8 0
2 years ago
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The sebaceous and sweat glands associated with the skin are classified as ________ glands because they release secretions to the
lbvjy [14]

Answer: exocrine glands

Explanation: Exocrine gland secrete substances to an epithelial surface through a channel.

The sebaceous and sweat glands associated with the skin also secrete substance to skin surfaces via ducts/ channels and are classified as endocrine gland. There are two glands in the human body Exocrine gland and Endocrine gland.

Endocrine gland secrete substance into the bloodstream directly. Examples of exocrine glands are sweat, salivary, mammary, sebaceous, and mucous.

liver and pancreas are both exocrine and endocrine glands simultaneously.

As exocrine gland, the liver secrete bile and the pancrease secrete pancreatic juice into the gastrointestinal tract through channels. While as endocrine gland they secrete other substances directly into the bloodstream.

6 0
1 year ago
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