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charle [14.2K]
3 years ago
9

A parasite is an organism that

Biology
1 answer:
Yuki888 [10]3 years ago
5 0
An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense; So basically, what you’ll be getting at is C, only harms another organism.
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What can the people of the Earth do to change this issue?
vova2212 [387]

Answer:

Whereas a change in a person may take 10-50 years to manifest itself, changes in the earth can take millions of years to become apparent. Also, humans may experience changes in their personalities as well as in their bodies, while changes in the earth are never psychological.

7 0
2 years ago
Scientists rely on _____ concepts when researching crop production and medicine. biology physics geology astronomy
vredina [299]
Scientist rely on <em>Biology </em>concepts when researching crop production and medicine.
4 0
3 years ago
in a dna molecule, the complementary strands are joined at the nucleotides by hydrogen bonds between the
avanturin [10]

Answer:

covalent bonds within each strand

Explanation:

3 0
3 years ago
You perform the following dihybrid cross: A blaBx Ab/aB. The A and B genes control different traits. What phenotypic ratio would
Luda [366]

Answer:

Option-D

Explanation:

In the given question the genotype of parental allele is- AbaB X AbaB. The alleles formed will be- AB, Ab,aB, ab in which the crossover allele will be AB and ab.

1. Unlinked genes

Now of these alleles are unlinked then the alleles will assort independently of each other therefore performing the punnett square we will get dihybrid ratio as 9:3:3:1 in which  

1. A_B_ are 9

2. aaB_ are 3

3. A_bb are-3

4. aabb- 1

Since the crossover allele are AB and ab therefore A_B_ are 9 and aabb- 1 represent recombinant genotype.

2. Linked genes

When the genes will be linked then chances of crossing over will be reduced as a result of which only two type of allele will be formed which are-  Ab and aB and the recombinant frequency will become less.

Crossing these allele will  form Aabb , AaBb , AaBb  and aaBB  genotypes. The recombinant ratio will decrease as A_B_ is 2 and aabb is not present.

Thus, option-4 which states that the unlinked ration is  9:3:3:1  and linked ratio is  <9: >3: >3: <1 is correct.

7 0
3 years ago
Animals making the territory with e
Sholpan [36]

Answer:

Animals making the territory with example Lion, Tiger, hyena among others

Explanation:

Animals marks their territory through secretion of pheromones, some makes sound, it is a form of behavioral act that allows to protect ones territory or boundary

5 0
2 years ago
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