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Vinil7 [7]
3 years ago
11

Which structure is specific to eukaryotic cells? a) dna b) nucleus c) cell membrane d) cytoplasm

Biology
2 answers:
Dmitry [639]3 years ago
4 0

The right answer is b) nucleus.

Eukaryotes (or Eukaryota) are a domain grouping all unicellular or multicellular organisms that are characterized by the presence of a nucleus and usually mitochondria in their cells. He opposes the domains of Eubacteria and Archaea.

Eukaryotes gather four great kingdoms of the living world: animals, mushrooms, plants and protists (or protozoa)

notsponge [240]3 years ago
3 0
B Nucleus is a structure specific to eukaryotic cells. 

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Human blood types are characterized by the presence absence of surface markers known as a tigers on the surface of red blood cel
zalisa [80]

Answer:

characterized by presence or absence of antigens

the blood types are A, B, O, AB

Explanation:

There are two antigens and two antibodies that are mostly responsible for the ABO types.  The specific combination of these four components determines an individual's type in most cases. Erythrocytes and serum were related to the presence of antigens on these erythrocytes and antibodies in the serum. these antigens  are A and B, and depending upon which antigen the erythrocytes express, blood either belonged to blood group A or blood group B. A third blood group contained erythrocytes that reacted as if they lacked the properties of A and B, and this group was later called "O" blood group. The fourth blood group AB, was added to the ABO blood group system. These erythrocytes expressed both A and B antigens.

Blood group   Antigen present on RBC    Antibodies in serum    Genotype(s)

      A                        antigen A                             anti-B                     AA or AO

      B                        antigen B                             anti-A                     BB or BO

      AB              both A and B antigen                 none                         AB

      O                           none                           anti-A and anti-B           OO

4 0
3 years ago
What adaptions do sea snakes have for life in the ocean?
Mnenie [13.5K]

Answer: Sea snakes have many adaptations. Like for instance, they have paddle-like tails to help swim more efficiently, and a special flap of tissue to prevent water from entering its lungs.

Explanation:

They develop these adaptations for survival purposes.

6 0
3 years ago
Read 2 more answers
Geologic plates move away from each other in a process called convergence. O True O False​
KengaRu [80]

Answer:

False

Explanation:

Convergence of plates can occur when

two geological tectonic plates are moving towards each other, where one of this plate go in direction beneath the other plate. As they moved towards each other mountain chain can be formed in a situation whereby the two plates has the same density.

Hence, the best option is FALSE because it is in only "DIVERGENCE PROCESS " that the plates moves away from each other.

7 0
3 years ago
8. Morgan used_____crosses to study a new pattern of inheritance.​
neonofarm [45]

Pretty sure he used female gametes

4 0
3 years ago
Th relationship between cats and mice could be best described as?
Dimas [21]
The relationship between cats and mice could be best described as 'Predator-Prey'.
7 0
3 years ago
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