Answer:
Red algae - acquired plastids by secondary endosymbiosis
Explanation:
Red algae are believed to have undergo a primary endosymbiosis event. Then a second endosymbiosis event created a large group known as heterokonts. During the primary endosymbiosis event red algae acquire their plastids.
Answer: False
Explanation:
Hemoglobin can be defined as red protein that transports oxygen to various parts of the body according to its need.
It does not transports the same amount of oxygen to all the tissues. Some tissues of the body might require more more oxygen and some cells might require less amount of oxygen.
It depends on the state of activity. It transports more oxygen to the tissue that require it the most.
Example: The skeletal muscles of the body require more oxygen and it can be more than 80% .
Hence, the given statement is false and hemoglobin does not releases the same amount of oxygen to each and every tissue of the body.
Answer:
True.
Explanation:
Polygeny occurs in organisms with complex genomes, when several pairs of genes interact to determine a trait, each with an additive effect on the other. Thanks to this type of interaction there is a very wide variety of phenotypes and genotypes for some characteristics. The interaction of these phenotypes with the environment further increases this variation, such as skin color and height, etc. In other words, polygeny is the state of a particular trait determined by the relationship or action of various genes.
There is more oxygen and carbon dioxide in the surface of the ocean because these gases rises and floats thus it will stay near the surface. Also, the solubility of these gases in water is small therefore only small concentrations can be found in water.
The right option is; b. detrital
Sandstone is a detrital sedimentary rock.
Sandstone is a detrital sedimentary rock that is made up of sand-sized mineral particles or rock fragments and is formed when pre-existing rocks are weathered by agents such as wind, water or ice. Sandstones usually contain quartz or feldspar due to their resistance to weathering processes and they may have any colour such as yellow, tan, brown, grey, white, and black.