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Citrus2011 [14]
3 years ago
9

Please help me with this question. at least 7 sentences. don’t copy and paste from google.

Biology
1 answer:
Darya [45]3 years ago
6 0

<u>Answer:</u>

Fossils are the sources to learn the changes on the earth and how much it changed in these years. Its provides us with information about the existence of plant and animals in the past.

Actually, the fossils we found till the date are the ancestors of the plants and animals that live today.  Moreover, some fossils of animals are easily identifiable since they exist till the date.  

But there are fossils of animals that exist no longer in the earth. By studying and analyzing the fossils, one can tell how life on the earth has changed.

Also, we can learn about the ancestors of the plants and animals and how their long life existed on earth.

In other words, one can learn where and how those organisms were lived. So that we can know about our ancient environments.

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4. What kind of functions can a plant cell perform that an animal cell cannot? Explain.​
inysia [295]

Answer:

Photosynthesis

Explanation:

3 0
3 years ago
The allele for brown hair (b) is dominant to the allele for blonde hair (b). if a man with brown hair and a woman with blonde ha
Alexxx [7]
Are any of the answers capitalized? I believe it's Bb.
3 0
3 years ago
In pea plants, purple flowers are dominant to white flowers, and the purple and white alleles are represented with P and p, resp
amm1812

Answer: 75% of the plants are purple and 25% are white. The phenotypic ratio can be expressed as 3:1.

Explanation:

Heterozygous means that its genotype has two distinct alleles, i.e. a dominant and a recessive one. So the genotype of the plants is Pp, and each plant has two alleles since<u> they are diploid organisms, which have two copies of each gene. </u>

<u>Each plant produces gametes, which are haploids cells. That is, they only have one copy of each gene (one allele)</u>. So, the gametes produced by Pp have a P or p genotype.  During fertilization, the maternal and paternal gamete are fused to form a diploid zygote where their genotype will have one allele from the father and one from the mother.

By making this monohybrid cross, we cross the gametes of each parent in the punnett square (see picture)

In the offspring, we see one PP genotype (homozygous dominant), two Pp genotypes (heterozygous) and one pp genotype (homozygous recessive). <u>Since we know the P allele is dominant and it codes for purple color, a genotype only needs one P allele to express that phenotype</u>. So Pp and PP organisms are purple, and only pp is white. That means 75% of the plants are purple and 25% are white. The phenotypic ratio can be expressed as 3:1.

4 0
3 years ago
In a fern, the prothallus is the gametophyte true or false
frosja888 [35]
A prothallium, or prothallus<span> is usually the </span>gametophyte<span> stage in the life of a </span>fern<span> or other pteridophyte. Occasionally the term is also used to describe the young </span>gametophyte<span> of a liverwort or peat moss as well.</span>
3 0
3 years ago
Read 2 more answers
Need answer fast if possible ​
Anni [7]
What is the question ?
7 0
3 years ago
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