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zubka84 [21]
3 years ago
13

Which statement describes a parasite? A parasite is beneficial to its host. A parasite is harmed in its relationship with the ho

st. A parasite only benefits when the host is alive. A parasite always kills its host and takes all the nutrients.
Biology
2 answers:
kkurt [141]3 years ago
8 0

Answer:

A paracite harms the host

Explanation:

In-s [12.5K]3 years ago
5 0

Answer:

A parasite only benefits when the host is alive.

Explanation:

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which enzyme is responsible for transcribing a gene on a DNA strand into an RNA molecule during transcription ​
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Which are segments of dna that code for spicific traits ?
Firdavs [7]

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Gene. A segment of a DNA molecule (a sequence of bases) that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism.

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As the ocean increases in depth how would producers and consumers be affected?<br> Explain why.
fredd [130]

Answer:

die

Explanation:

Food webs describe who eats whom in an ecological community. Made of interconnected food chains, food webs help us understand how changes to ecosystems — say, removing a top predator or adding nutrients — affect many different species, both directly and indirectly.

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3 0
2 years ago
For each region of the lac operon on the F' plasmid, I+ P+ Oc Z− Y+ , determine whether the region is wild type (that is, it pro
UNO [17]

Answer:

A,B and E

Explanation:

  • I+: I refers to the lac repressor, the + indicates that the repressor is functional
  • P+:  P refers to the promoter region and the + indicates that the promoter is functional
  • Oc:  O refers to the operator region, but the Oc indicates that the operator is constitutive ie. that it is always on/ can't be turned off.
  • Z-: Z refers to the LacZ gene which produces β-galactosidase. Z- indicates that this gene is non-functional
  • Y+:  Y refers to the LacY gene which produces the permease protein. Y+ indicates that this gene is functional

So based on the breakdown above:

  • A is true because P+.
  • B is true because I+.
  • C is not true because the lac operon is an inducible system. The operator needs to be able to be repressed. In this case the operator is constitutive (always on)  which is not the correct form.
  • D is not true because Z-, no β-galactosidase is produced.
  • E is true because Y+.

Only A, B and E apply.

6 0
2 years ago
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