Answer:
These organelles are contractile vacuoles
Explanation:
Contractile vacuoles are intercellular pumps that are slowly filled with fresh water and eventually expel their contents outside the cell. Freshwater protists maintain the hydric equilibrium by contractile vacuoles that pump out the water of the cell and thus prevent the cell swelling induced by osmotic stress.
Biology is the study of living organisms.
Answer:
The correct answer is - surface, proteins, and sugars.
Explanation:
Adhesins are the appendages present on the surface of the pathogen that help these pathogens to attach to the host cell and surface of the host. Adhesins are the components that are virulence factor these are present in both viruses and bacteria.
The adhesin component is generally made up of mainly of the proteins and sugars which help them to adhere to the cell of the host.
Thus, the correct answer is - surface, proteins, and sugars.
The DNA molecule is composed of two long complementary chains of nucleotides. The complementary DNA sequence of CGTA is GCAT.
The DNA molecule is composed of two antiparallel strands of nucleotides linked together by hydrogen bonds.
In DNA, there are four types of nucleotides, each containing one different nitrogenous base (i.e., Adenine, Guanine, Cytocine and Thymine).
In RNA, Thymine bases are replaced by Uracil bases.
According to the base pair rules, Adenine (A) always pairs with Thymine (T), whereas Cytosine (C) always pairs with Guanine (G).
In conclusion, the complementary DNA sequence of CGTA is GCAT.
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<h3><u>Answer;</u></h3>
Temperature and salinity
<h3><u>Explanation;</u></h3>
- Differences in the density of water can cause currents to form and move.
- Density is affected by temperature and salinity. Cold water or water with dissolved salts (higher salinity) is denser than warm water or water without dissolved salts.
- The different densities cause the water to move, forming a density current. In the oceans, the deep,bottom currents are colder and saltier than the surface currents.
