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Alecsey [184]
4 years ago
7

During which era in earth's history were the first insects?

Biology
1 answer:
nordsb [41]4 years ago
6 0
According to the evolution theory, the first insects appeared about 400 million years BC in the Devonian Period. 
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Siblings have similar traits because they inherit those traits from a common ancestor. How is this similar to some evidence for
klemol [59]
Similarly to the siblings which inherit some traits from mother or father, in the process of evolution, two organisms can have some similar traits because they inherited them from a common ancestor. Similarities seen among related organisms suggest that they have a common ancestor.
5 0
3 years ago
When two plants, both y’all, were crossed, they produced some offspring that were dwarves. Assuming that the height of the plant
GarryVolchara [31]

Answer:

Both parents have a genotype of Tt

Explanation:

Let's say the genotype for tall is T and the genotype of short is t

When the plants are crossed, it looks a little like this:

                                                                                  <u>        I  T    I     t    I</u>

                                                                                  <u>I   T  I  TT  I   Tt   I</u>

                                                                                  <u>I   t   I   Tt  I   tt    I</u>

                            The lower case tt represents the dwarf plants

Hope this helps :)

4 0
3 years ago
Fiddler crabs are invertebrates. That means they do not have a backbone (that's made out of vertebrae). Does this mean they don'
Nuetrik [128]

Answer:

No, this is not true.

Explanation:

Fiddler crabs have exoskeletons, meaning their skeletons are found on the outside of their body rather than the inside.

6 0
4 years ago
What attractive force holds one chlorine atom and one sodium atom together to make the substance salt?
BARSIC [14]

B chemical bonding i think

4 0
3 years ago
Read 2 more answers
Which cycle involves a symbiotic relationship between bacteria and legumes (beans, peas, etc.)?
Dvinal [7]

Answer: B- nitrogen 

Answer choices are:

<span>A- water 
B- nitrogen 
C- carbon 
D- phosphorus</span>

<span>The idea of helping someone to get some help in return resulting to close interactions is a symbiotic relationship. In a symbiotic relationship, the two species in the relationship like bacteria and legumes live together.</span>

<span>Legumes have root nodules that provide a home for bacteria (rhizobia).   Rhizobia that fixes nitrogen. They convert nitrogen gas from the atmosphere into ammonia. This ammonia is in turn used in the formation of amino acids and nucleotides in legumes. This is the nitrogen  <span>cycle which involves a symbiotic relationship between bacteria and </span></span>
6 0
3 years ago
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