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What are two ways that Bacteria offect plants

Oduvanchick [21]

Bacteria may affect plants in a number of ways. Diseases have been mentioned, but most bacteria co-exist with plants quite easily. Several bacteria are involved with the transitions of nutrients and make nutrients such as nitrogen plant available (the plant is only able to absorb some nutrients in certain molecular forms). While other bacteria convert nutrients and toxins into forms unavailable to the plant.

Other bacteria make Some bacteria, Rhizobia in particular, develop symbiotic relationships with some plants. Rhizobia convert atmospheric nitrogen into ammonium which is plant available. In exchange, the plant provides Rhizobia with shelter (a root nodule) and food (photosynthates).

4 0

3 years ago

Why a genetic bottleneck can be an important evolutionary factor for a species

melisa1 [442]

Answer:

Genetic drift decreases genetic diversity within a population.

Explanation:

Genetic drift decreases genetic diversity within a population. It is a change in allele frequencies due entirely to random chance and is more likely to affect smaller populations than large ones. Population bottlenecks can lead to genetic drift.

6 0

2 years ago

A husband and wife both have cleft chins, and when you look at their four children, three also have cleft chins; however, one do

Reptile [31]

Answer:

B- A cleft chin is due to a dominant allele

Explanation:

A husband and wife both having the phenotype for cleft chin and producing an offspring without a cleft chin, indicates heterozygousity in their genotype.

With the heterozygous genotype however, they both expressed the phenotype for cleft chin, indicating that the allele for cleft chin is dominant over the allele coding for normal chin.

Since both parents are heterozygous for cleft lip, the sequence of genotype in their offspring will be:

25% chance of having homozygous cleft chin
50% chance of having heterozygous cleft chin
25% chance of having homozygous normal chin

Because of the dominance of the cleft chin allele, both homozygous and heterozygous forms of the cleft chin allele, will be expressed in the offspring and only the offspring homozygous for normal chin will not express this allele.

6 0

2 years ago

You are studying 5 genes: a, b, c, d, and e. In an attempt to map them, you perform a series of two-point crosses with the resul

ZanzabumX [31]

Answer:

Gene order will be- a,d,e,b,c

Explanation:

Gene mapping refers to the arrangement of genes on the chromosomes. The genes can be mapped on the chromosome by calculation the recombination frequency in the hybrid crosses.

The recombination frequency can be represented on the chromosomes to show the distance between the genes which is measured as centimorgan. 1 percent recombination is considered 1 cM.

In the given question, since the distance between the gene has been provided therefore the genes can be mapped on the chromosome.

This could be done in the following manner-

1. Take the highest value of distance- 21 m. u between a and c.

2. Now take c as a reference point and arrange the other distance measuring distance from the c.

3. On this basis- c-d, c-e and b-c can be plotted.

4. Now, plot other values taking an as a reference point and plot the values b-e, a-b, a-d.

5. the genes will be arranged in the order a,d,e,b,c.

Thus, a,d,e,b,c is the correct answer.

7 0

3 years ago

Help pls for 15 points and brainliest

Softa [21]

U caping I only get 8 points if I help u

6 0

3 years ago

What is menstruation?jo.in me G.o.ogle me.etgqf-ksez-trg​

What is menstruation?jo.in me G.o.ogle me.etgqf-ksez-trg