Answer:Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, into fibrin, which, in combination with platelets from the blood, forms a clot (a process called coagulation).
Explanation:
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The four Macromolecules of Life
- Carbohydrates
- Lipids
- Proteins
- Nucleic acids
Answer: Conjugation
Explanation:
Bacterial conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells. This takes place through a pilus. It is a parasexual mode of reproduction in bacteria.
Answer:
Organisms of all classes are matched as follows-
Explanation:
Insects- Insects are a group in phylum arthropoda. They are having 6 legs and their body is devided into 3 parts- head thorax and abdomen.
Mollusca- Second largest phylum of invertebrates. These are mostly marine some live on land also. They have soft body with hard calcium carbonate shell known as mantle.
Bryophyta- These are nonvascular plants. They dont have vascular system.They don't produce flowers or pollen. They reproduce by spores. Example- mosses
Aves- This is class of birds. Their charactersticks are beaks, toothless jaws,feathers and laying eggs.
Mammalia- These are vertebrates animals class. They give birth to their young ones, female are having well developed mammary glands to produce milk for young ones.
Arachnida- This is a class of invertebrates. It includes scorpion, spider. They are 8 legged creatures. Body has two parts.
Answer:
a. sister chromatids separate during anaphase.
Explanation:
Meiosis II is similar to mitosis because in both the divisions, the chromatids separate during anaphase of the respective cell didvisions by splitting of centromere resulting movement of chromatids towards their respective poles in the cell. Both these divisions separate into two daughter cells with the same chromosome number as in the parent cell. Therefore, Meiosis II and mitosis are the equational division as after division chromosome number remains the same as in the parent.
