Answer:
All green algae produce large, stationary eggs
Explanation:
The research on the evolution of land plants has shown that the plants have evolved from the green algae especially the "Charophytes" which grows in on the rocks attached to the rocks on the seashore.
The evidence that plants evolved from the green algae was supported by the:
1. The storage material of both the plants and algae is the same that is starch
2. both the algae and plants have the sporophytic and gametophytic life cycle
3. Both the plants and algae possess the same type of the photosynthetic pigments like chlorophyll a,b,c,d and others.
4. Both have a cell wall made of cellulose
But the green algae produce the stationary eggs does not support the hypothesis as the plants not necessary produce the stationary eggs.
Thus, the selected option is correct.
Answer:
The correct answer is ''action potentials from different sensory modalities are carried on different nerve tracts.''
Explanation:
A nerve tract is a set of axons (bundles of nerve fibers) of the central nervous system that have the same origin and the same destination. Each of the main sensory types that we can experience, pain, touch, vision, sound, etc., is called sensation modality. Nerve fibers only transmit action potentials whatever the stimulus. The perceived modality will depend on the specific point in the central nervous system where the excited fiber ends, that is, the response indicates that each nerve bundle ends at a specific point in the central nervous system and the type of sensation experienced when a nerve fiber is stimulated is determined by the area of the nervous system to which this fiber leads. For example, if a fiber is stimulated for pain, the person perceives this sensation regardless of the type of stimulus that excites them. It can be electricity, overheating the fiber, crushing it, or activating the nerve ending for pain when tissue cells are injured. In all these cases, the person perceives pain. Similarly, if a tactile fiber is stimulated by electrical excitation of a touch receptor or by some other mechanism, the person perceives a sensation of touch because these fibers lead to specific areas of touch in the brain. In this same sense, the fibers from the ocular retina end in the visual areas of the brain, those from the ear end in the auditory areas and the thermal fibers in the areas for temperature. This specificity of nerve fibers to transmit nothing more than a sensation modality is called the principle of the marked line.
Answer:
Thanks to its high specific heat, water plays a very important role as a temperature regulator
Explanation:
The specific heat is the amount of heat needed per unit mass to raise the temperature one degree Celsius. The specific heat of the water is 1 calorie / gram. Water is one of the substances with higher specific heat and this is why water plays a very important role as a good temperature regulator.
Water changes its temperature, absorbs or loses a large amount of heat but only changes, either by increasing or decreasing its temperature very little. This property is essential for living beings as it reduces drastic changes in temperature. It also helps that our body does not overheat or over cool since this property helps us maintain thermal balance.
Number one is A and Number two is A as well