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Aleksandr-060686 [28]
3 years ago
15

What were the first mammals like

Biology
2 answers:
jeka943 years ago
7 0
Mammals evolved during the Triassic period. I believe the first mammal was like a tiny shrew-like animals. They called it the Eutherian. But the actually mammals were the dinosaurs. 
Marina86 [1]3 years ago
5 0
Mammals enrolled during the Triassic period about the same time that the first dinosaurs appeared the first placental mammals appeared at the beginning of the Cretaceous period the earliest mammals were tiny sure like mammals
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Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of
natali 33 [55]

The correct option is (a) 2 → 4 → 1 → 3

A change occurs in the environment. → Poorly adapted individuals have decreased survivorship. → Well-adapted individuals leave more offspring than do poorly adapted individuals. → Genetic frequencies within the population change.

<h3>What is genetic variation in population?</h3>
  • The presence of various alleles, or different gene versions, within a population indicates genetic variety.
  • If there is genetic variation, then everybody in the population will have various genotypes depending on the alleles they carry.
  • Genetic loci that have many alleles are said to be polymorphic. Human characteristics like blood type and eye color, for instance, are polymorphic.

Learn more about the genetic variation with the help of the given link:

brainly.com/question/848479

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3 0
2 years ago
A particular triplet of bases in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is __
earnstyle [38]

Answer:

The correct answer is 3' UCA 5'

Explanation:

The rule of pairing of base-pair says that A and T base pairs with each other with two hydrogen bonds and G and C base pairs with each other with three hydrogen bonds in DNA. In the case of RNA Uracil comes at the place of thymine that means uracil replaces thymine.

Therefore according to this base-pairing rule the corresponding codon of mRNA transcribes from DNA codon 5' AGT 3' will be 3' UCA 5' as U came in place of A nucleotide, C comes in place of G nucleotide, and A comes in place of T nucleotide.  

Therefore the correct answer is 3' UCA 5'.

4 0
3 years ago
What is denaturing and what cause it to occur
Alexeev081 [22]
Denaturing is when the temperature is too high and the enzymes are destroyed
8 0
3 years ago
A solution that is a 4 on the pH scale is a
Ulleksa [173]
A solution that is a 4 on the pH scale is an acid, about the acidity of tomato juice.
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7 0
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