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3 years ago

What period of the Mesozoic era did birds first appear?

2 answers:

6 0

<span>The dinosaurs and the mammals appeared during the Triassic period, roughly 225 million years ago. The dinosaurs went extinct 65 million years ago. The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous.</span>

Komok [63]3 years ago

4 0

The earliest known birds appeared during the Jurassic Period of the Mesozoic Era, approximately 150 million years ago.

Thats what google said, sooo you decide what you want to do. :) Good luck!

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What’s the difference between weather and climate, and what comprises the Earth's atmosphere? Explain the relationships between

ziro4ka [17]

Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. ... Weather tells you what to wear each day. Climate tells you what types of clothes to have in your closet.

plz give me brainiest

3 0

3 years ago

Objective about human evolution

vladimir1956 [14]

Answer:

The objective is to make life easier for us

Explanation:

7 0

3 years ago

A plant that produces wrinkled, green seeds was mated to a plant that produces phenotypically round, yellow seeds. In the F1 gen

sergejj [24]

Answer:

Genotype of the parental plant that produced round, yellow seeds is RRgg

Explanation:

Let us say that allele for round shape (R) is dominant over allele for wrinkled shape(r)

and allele for green color (G) is dominant over allele for yellow color of seed.

So a wrinkled green seed will have genotype either "rrGG" or "rrGg"

Like wise a round, yellow seeds will have genotype either "RRgg" or "Rrgg"

It is given that In the F1 generation, half of the plants produced round, yellow seeds and the other half produced round, green seeds.

So if a cross is carried between rrGg and RRgg, the following offspring will be produces

rG rG rg rg

Rg RrGg RrGg Rrgg Rrgg

So genotype “RrGg” gives round and green seeds

And genotype “Rrgg” gives round and green seed

Thus, genotype of the parental plant that produced round, yellow seeds is RRgg

5 0

3 years ago

What component is affected when a catalyst is added to a chemical reaction

exis [7]

The amount of the product

6 0

4 years ago

How did the author organize the steps to make the water cycle model? Select two choices O A. by including numbered directions O

vova2212 [387]

Answer: It might be C and D, if I am right please brainlist me

Explanation:

6 0

3 years ago