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leva [86]
3 years ago
8

Define organelle and explain what it is

Biology
2 answers:
d1i1m1o1n [39]3 years ago
3 0
A little thing in a cell that helps out 
hammer [34]3 years ago
3 0
An organized or specialized structure within a cell.
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If the same base pairs are used to code for all organisms, why is there so much variation among organisms?
tamaranim1 [39]
The base pairs are put into different orders and these orders code for different amino acids.
4 0
3 years ago
Bear pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown). D is dominant
White raven [17]

Answer:

9/16 black, 3/16 brown, 4/16 white

Explanation:

             BD         Bd          bD         bd

BD     BBDD      BBDd     BbDD     BbDd

Bd      BBDd      BBdd     BbDd      Bbdd

bD      BbDD     BbDd      bbDD     bbDd

bd       BbDd    Bbdd       bbDd     bbdd

A punnet square can be described as a diagram which is made to predict the genotype as well as the phenotypes of the offsprings of a cross.

To study the epistatis nature of the pigmentation in bear, a punnet square was made and the results of the punnet square are shown above.

The results of the punnet square show that the cross between two bears will have the chances of producing 9/16 black bears, 3/16 brown bears and 4/16 white bears.

4 0
3 years ago
Which of these sentences describe sources and preservation of genetic variation? Select all that apply.
madam [21]

The correct sentences are the following:

 A) Antibiotic resistance in bacterial populations is caused by natural selection of bacteria that inherit mutations that make them resistant to the antibiotics.

 C) Crossing-over causes a shuffling of allele combinations during meiosis as the alleles from each parent form new combinations on homologous chromosomes.

 E) When two bacteria are linked during conjugation, the donor cell passes DNA to the recipient cell which causes genetic recombination.

Explanation:

These three options are associated with the generation and preservation of genetic diversity

4 0
3 years ago
Which type of immune system cell engulfs pathogens and other foreign particles?
FromTheMoon [43]

A macrophage is a large phagocytic cell that engulfs foreign particles and pathogens. So Macrophage.

Hope this help! :)

6 0
2 years ago
The probability of any particular allele occurring in a gamete is best explained by which event?
larisa [96]
A, mitotic cell division
5 0
3 years ago
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