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3 years ago

A commensal bacterium ____________________

Biology

1 answer:

vichka [17]3 years ago

8 0

Answer:

The correct option is: b) may also be an opportunistic pathogen

Explanation:

Commensalism is a kind of symbiotic relationship between two different biological organisms. In this interaction, one of the organism is benefited whereas the other organism is neither harmed nor benefited.

The organism that gains benefits from the host is known as the commensal. The commensal may obtain benefits like shelter, nutrients, protection, and locomotion.

However, the commensal bacteria can be an opportunistic pathogen.

Opportunistic pathogens are the pathogens that can cause an infection or a disease if the host has a weak immune system.

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In a plant, leaf color and leaf shape are controlled by two linked genes Leaves of the wild-type plant are red. A recessive muta

Brrunno [24]

Solution :

Red is dominant over the white leaves and pointed is dominant over smooth.

Red = R , white = r

Pointed = P , smooth = p

Red, pointed x white,smooth ------ Parents

RRPP rrpp

RP rp ----------------- Gametes

RrPp -------- $F_1$

(red, pointed)

When this $F_1$ is test crossed,

RrPp x rrpp ---- $F_1$ test cross

Gametes → rp

RP ---------- RrPp - red, pointed - 36 parental type

Rp ---------- Rprp - red, smooth - 14 re- combination

rP ----------- rrPp - white pointed - 10 re- combination

rp ----------- rrpp - white, smooth - 40 - parental type

Total = 100

As this ratio is deviating from 1:1:1:1, it indicated the two genes are linked.

Linkage strength = percentage of crossing over = map distance between the genes.

Percentage crossing = recombination frequency = percentage of recombination.

Recombination frequency $=\frac{\text{total no. of recombination}}{\text{total no. of progeny}}\times 100$

$=\frac{14+10}{100} \times 100$

= 24 %

= 24 map units

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3 years ago

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taurus [48]

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4 years ago

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laiz [17]

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fenix001 [56]

I might be wrong but I think C ( what the wave it traveling through). I think C because a wave medium is the substance that carries a wave (or disturbance) from one location to another. The wave medium is not the wave itself and it doesn’t make the wave. It just Carries or transports the wave from its source to other locations.

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Eukaryotic messenger RNA can undergo post synthetic processing after transcription and before translation. One of the processing

AnnyKZ [126]

Answer:

Statements that are true are:

B) in splicing, intron sequences are removed from the mRNA in the form of lariats (loops), and are degraded = TRUE

C) one mRNA can sometimes code for more than one protein by splicing at alternative sites = TRUE

E) splicing occurs while the mRNA is still in the nucleus = TRUE

Statements that are false are:

A) splicing occurs while the mRNA is attached to the nucleosome = FALSE

D) splicing of mRNA does not involve any proteins = FALSE

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3 years ago