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lord [1]
3 years ago
8

What is the definition of antigen

Biology
1 answer:
SIZIF [17.4K]3 years ago
7 0
A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
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A phylogenetic tree shows that birds and crocodiles share many features. A hypothesis based on this tree predicts that these fea
Anastaziya [24]

Complete question: A phylogenetic tree shows that birds and crocodiles share many features. A hypothesis based on this tree predicts that these features are present in a common ancestor. Which of these predicted traits is supported by fossil evidence?

A) four-chambered heart

B) singing for territory

C) eggs and nests

D) singing to attract mates

Answer: (c) eggs and nests

Explanation:

A hypothesis based on phylogenetic tree shows that birds and crocodiles have ancestral connection. Fossil evidence shows that their common ancestor exhibit oviparity as a means of reproduction (i.e. laying of eggs and embryo develops within the egg), and also housed their eggs in the nest for protection against predators and other important reasons.

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What are some examples of lab saftey rules. Explain why these rules are put in place for the learning environment and what would
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How was the government able to make children go to residential school?

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3 years ago
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1. Other than having many features in common, state other characteristics of species 2. Give reasons for the loss of energy from
Natasha2012 [34]

Answer:

As a metabolic heat.

Explanation:

The loss of energy from one trophic level to the next in a food chain occurs because energy is lost in the form of heat when the organisms from one trophic level are consumed by organisms from the next level. Only 10% of energy is transferred from one trophic level to another while the remaining 90% energy is lost in the form of heat energy in the ecosystem.

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Why are adults bigger than they were as children biology
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The answer to this would be C.


As children grow, they gain more cells due to multiplication.

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3 years ago
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Which symptom is not associated with vitamin b deficiency?
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There are a lot of different types of vitamin B and all come from different types of foods. One of the symptoms that doesn't appear in any of the different types is an <span>increased appetite.Possible symptoms can be: </span><span>weakness, <span>irritability, depression, anemia and confusion
Answer: </span></span><span><span>increased appetite</span></span>
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6 0
3 years ago
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