Answer:
Stomata and lenticels are two types of small pores, which occur in plants. Generally, they are responsible for the gas exchange
Explanation:
Stomata are pores found in the epidermis of leaves, stem and other organs that are used to control gas exchange. They mainly occur in the lower epidermis of leaves, whereas lenticels occur in the periderm of the woody trunk or stems and are lens shaped spots or pores.
A polar molecule has a positive and negative end because of electronegativity.
Answer:
The correct answer will be- Direct signalling
Explanation:
Direct signalling is a type of signalling which takes place between the neighbouring cells through gap junctions present between them.
The cardiac muscle cells possess gap junctions which allow the transmission of signals between cells. The cells of the muscle perform the same function simultaneously as the gap junctions allow the transmission of electrical signals.
Since this direct cell to cell transmission of the cell involves the gap junctions and thus direct signalling is the correct answer.
The transfer of signaling molecules communicates the current state of the cell that is directly next to the target cell; this allows a group of cells to coordinate their response to a signal that only one of them may have received. In plants, plasmodesmata are ubiquitous, making the entire plant into a giant communication network.
Gap junctions are particularly important in cardiac muscle: the signal to contract is passed efficiently through gap junctions, allowing the heart muscle cells to contract in unison.
y transferring signaling molecules across gap junctions between neighboring cells.
The law of spontaneous generation states that the living forms can grow from the non-living objects. The examples of this law were believed to be the arrival of maggots on meat, and dust from the flies. This law was believed to be true for an extended period of time. During those times, the microscope was not invented, and hence, people were unaware about the existence of the living organisms that cannot be seen with the naked eyes (microorganisms). This led to the people believe in the spontaneous appearances of life forms.
Answer: Water, Oxygen, and Carbon Dioxide
Explanation: The water travels to get to the root of the plant so it could help the plant grow. The oxygen travels through the somata so it could be a waste from the plant through the process of photosynthesis. The carbon dixoide travels in as an input for photosynthesis.
