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alexgriva [62]
3 years ago
10

1. In what ways are mollusks and annelids alike?

Biology
1 answer:
Alekssandra [29.7K]3 years ago
4 0

Answer: A closed circulatory system and an excretory system consisting of tubular nephridia

Explanation:

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How do the homologous chromosomes compare to each other ?
kotegsom [21]

Answer:

The two chromosomes in a homologous pair are very similar to one another and have the same size and shape. Most importantly, they carry the same type of genetic information: that is, they have the same genes in the same locations.

Explanation:

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How does a Covalent Bond Form? ( No goo.gle ik the goo.gle answer cause i tryed looking it up if you put tht answer u wont get b
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A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. Shared electrons located in the space between the two nuclei are called bonding electrons. The bonded pair is the “glue” that holds the atoms together in molecular units.

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Which surface of an epithelial cell lies closest to its blood supply
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Answer: The surface of an epithelial cell which lies closest to its blood supply is called as the Basal surface.

Epithelial cell is primarily composed of two surface-

1) Apical surface- It is exposed to the environment and lies towards the lumen or internal organ cavity.  

2) Basal/ Basolateral surface- It is not exposed to the environment. It lies interiorly and attached to the basement membrane via integrin.

Epithelial cells do not have own blood supply. For obtaining nutrients, they are dependent on the blood capillaries which are present in the nearby tissues. For accomplishing this, the basal surface of epithelial cell plays an essential role. The nutrients from blood enters basal surface via basement membrane which is a selectively permeable membrane.

Thus, basal surface of epithelial cells lies closest to the blood supply.  






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3 years ago
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A pea plant with genotype PP (purple flowers) mates with a plant with the genotype pp (white flowers). The dominant allele P cod
Basile [38]

In the question, it is given that the purple flowers are dominant to the white flowers. The dominant allele for the flower is P, and the recessive allele for the flower is p.

So, the possible genotypes of the purple flower is - PP or Pp.

And, the possible genotype of the white flower is - pp.

The cross1 shows the cross between PP and pp.

The phenotype of all the offspring in the cross 1 is Purple, and the genotype is pp. Hence, the possibility of getting purple flowers in the progeny is 100%.

Homozygous dominant genotype is the condition, in which the plant's alleles are same and both are dominant.

The cross 2 shows the cross between Pp and pp:

The homozygous dominant genotype (PP) is 1 and the total number of progeny is 4. So, the probability of occurence of PP is 1/4 or 25%.

Hence, the first blank can be filled with 100% and the second blank can be filled with 25%.



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3 years ago
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What is a radical in biology ?? ​
melamori03 [73]

Answer:A radical (often, but unnecessarily called a free radical) is an atom or group of atoms that have one or more unpaired electrons. ... A prominent feature of radicals is that they have extremely high chemical reactivity, which explains not only their normal biological activities, but how they inflict damage on cells.

Explanation:CAN I GET BRAINLIEST PLZZZZZZZZZZZ

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