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3 years ago

Why is the genetic code common to all organisms?

1 answer:

6 0

It is common to all organisms because all organisms evolved from the same ancestor over a large period of time and these ancestors shared a genetic code.

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After researching the possible effects of music, Elaina proposes that if people listen to faster-paced music, their pulse rates

Angelina_Jolie [31]

Answer:

Constant variables

Explanation:

Elaina's investigation lacked the critical ingredient of constant variables which are important components of every scientific investigation. In every research, there are 3 important variables, namely:

1. Dependent variables: the actual variable to be measured during the course of investigations and whose values are dependent on another variable (independent variable) supplied by the investigators.

2. Independent variable: one of the variables that are supplied by investigators whose values are often manipulated to see the kind of changes it will cause to the dependent variable.

3. Constant variables: other variables that are neither independent nor dependent but constant for all the various experimental groups in investigations.

5 0

2 years ago

_________ can be found in the nucleus of an animal cell.

Vinvika [58]

All of the above. Good luck with the bio

4 0

2 years ago

In beans the pod texture and growth form genes are located on different chromosomes. There are two varieties of beans in a farme

irina1246 [14]

Answer:

a. Genotype in F1 - TtBb

Phenotype in F1 - tough pods, bush-type growth

b. Proportion of F2 that are heterozygous for bush-type growth form = 5/8

c. Proportion of the F2 with tender pods = 1/4

d. Proportion of F2 that are heterozygous for growth form and have tender pods = 1/8

Explanation:

Since the two traits are located on different chromosomes, they will independently assort during gametes formation. T is dominant over t and B is dominant over b.

Two true-breeding varieties were crossed at the beginning of the program:

TTBB x ttbb

All F1 plants will have the genotype TtBb with tough pods and bush-type growth form.

Advancing the cross to F2:

TtBb x TtBb

Progeny

1 TTBB - tough pods, bush-type

2 TTBb - tough pods, bush-type

2 TtBB - tough pods, bush-type

4 TtBb - tough pods, bush-type

1 TTbb - tough pods, climbing-type

2 Ttbb - tough pods, climbing-type

1 ttBB - tender pods, bush-type

2 ttBb - tender pods, bush-type

1 ttbb - tender pods, climbing-type

Proportion of F2 that are heterozygous for bush-type growth form = 10/16 = 5/8

Proportion of the F2 with tender pods = 4/16 = 1/4

Proportion of F2 that are heterozygous for growth form and have tender pods = 2/16 = 1/8

7 0

3 years ago

In mosses gametes are produced by _____; in ferns gametes are produced by _____. In mosses gametes are produced by _____; in fer

Aneli [31]

Answer:

In mosses gamete are produced by MITOSIS; In ferns gametes are produced by MITOSIS.

Explanation:

Ferns usually grow way bigger than mosses and they are both primitive plants. In ferns the gametes, sperm and eggs are formed by mitosis when there is a suitable place for development.

6 0

3 years ago

Decomposers are necessary in an ecosystem because they

nekit [7.7K]

They return nutrients from waste or dead organisms back into the ecosystem to be recycled.

7 0

3 years ago