Answer: A. Archaea lack peptidoglycan.
Species of bacteria are named gram-positive because of their positive respond towards gram staining technique. These bacteria retain the crystal violet dye and are colored pink or purple because of the presence of thick layer of peptidoglycan in their cell walls, whereas the gram-negative bacteria has thin layer of peptidoglycan hence, cannot retain the stain of the dye. Archaea species do not possess peptidoglycan in their cell wall, therefore will give negative response to gram staining technique, hence, there are no gram-positive Archaea species.
Answer and explanation;
Slow spreading rate
Top middle- rift valley
Top Right- poorly- developed magma chamber
Rapid Speading rate
Top left- Swell
Top Right- Well- Developed magma chamber
Bottom middle- Diverging plates
Explanation;
-Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
-This is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor. As the plates move apart, new material wells up and cools onto the edge of the plates.
I think it's A.
phenotype frequency is the number of individuals in a population that have a specific observable trait or phenotype
As for this question, the answer would be B. kidney.
GU system or what they call as the Genitourinary system and may also be referred to as urogenital system is the system of both the reproductive system and the urinary system. They can be classified together into one system due to their immediate proximity, their origin during the embryological stages, and also the usage of a common organ. Rectum would be part of the excretory system. Lymph nodes would be of the lymphatic system and the adrenal gland would be in the endocrine system.
1) You get a graduated cylinder and fill it with water
2) Then You add sand and then add salt
3) You will notice that the sand and salt immediately fall to the bottom that is because their density is greater than water.
