D. They come from other living things
Explanation:
The cell theory states that all living things come from preexisting cells.
Answer:
Physical and chemical weathering often happen at the same time, but the ... Water that freezes in cracks and forms ice, salt from evaporated seawater, ... For example, the rocks on a riverbed smooth each other because they collide in the current. ... Oxidation is the reaction of oxygen with chemicals in a rock.
Explanation:
Answer:
Animal
Explanation:
The fact that the seed is sweet and fleshy means it attracts animals who ingest it due to its palatability. The animals get to diperse the plant seeds. The acidic environment of the digestive tract of the animals helps soften the seed coat. When the seed is finally excreted by the animal, is can easily germinate.
Answer:
Explanation:
A Pure bacterial culture must be grown in sterile tryptophan or peptone broth for 24–48 hours before performing the test. A sterile environment helps to avoid contamination.
When a test is conducted and it shows the presence of a red or red-violet color in the surface alcohol layer it means the result is positive
But when the colour is yellow it indicate negative reaction due to glucose fermentation.
A deviation from two color may also occur when we have an orange color. This colour change is due to the presence of methyl indole
When there is no color change this indicate No decarboxylase which is an enzyme needed for the fermentation reaction.
Color changes are indicator of how successful the reaction was.
Answer:
The pulmonary vein and the jugular vein.
Explanation:
The greatest difference between the pulmonary vein and the jugular vein is that pulmonary vein takes oxygenated blood from both lungs towards the left atrium of heart while jugular vein takes the deoxygenated blood from head back towards right atrium of heart through superior vena cava.
So, the main difference is oxygenated and deoxygenated blood in the above mentioned veins.
