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Annette [7]
3 years ago
8

First invertebrates to develop a true nervous system​

Biology
1 answer:
Tasya [4]3 years ago
8 0

Answer:

Coelenterates are the first invertebrates to develop a true nervous system.

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A plant with round seeds is crossed with a plant with wrinkled seeds. Draw a Punnett square to predict the outcome
astraxan [27]

Answer:

Explanation:

A cross between plants with round seeds (RR) and plants with wrinkled seeds (rr).  If both parents are homozygous, having one type of gamete each, i.e. R from round seed parent and r from wrinkled seed parent (RR X rr).

    R     R

r   Rr     Rr

r   Rr     Rr

All the offspring of generation would be round with genetic constitution Rr. They will be heterozygous plants having two different alleles.  

If both parents has heterozygous round seeds with genotype Rr. So, we have Rr × Rr. The gametes produced from each of the parents are of two types, R and r.

   

     R      r

R    RR    Rr

r     Rr      rr

The generation has a genotypic ratio of 1 RR : 2 Rr : 1 rr. The phenotypic ratio is 3 round : 1 wrinkled.

5 0
4 years ago
21. Fill in the flow chart: Cells are grouped together to form ____________ ______________ __________________ ______________.
n200080 [17]

Answer - tissues and organs.

6 0
3 years ago
Are all plant structure and function the same? Explain
ratelena [41]

Answer:

no

Explanation:

trees r hard and flowerss arent

trees make wood

flowers make

<h2>a i r</h2>
5 0
3 years ago
Read 2 more answers
Domestic cats transfer their genetic information to their offspring by meiosis. If a kitten has 38 chromosomes, how many chromos
Ira Lisetskai [31]

Since domestic cats reproduce through meiosis, each parent gives off half of their genetic code (or DNA) to their offspring. The answer would be B, 19 chromosomes because that is half of 38. That is why when a parent gives birth to their child, they don't look exactly the same or act exactly the same as either of their parents. They are a mix of both, which is another explanation for why no two people look exactly alike.

You may wonder, a domestic cat births more than one offspring at a time. If multiple offspring share the same parents, why don't they look the same? The reason for that is because the half DNA that the parent is giving off is a different half than they gave to another offspring, if that makes any sense.

Hope that helped you! :)


4 0
4 years ago
What was Charles Darwin’s contribution to the theory of evolution?
ad-work [718]
His studies and his book the 'origin of species'?

unless this is for penn foster then what are you options?
8 0
4 years ago
Read 2 more answers
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