Answer:
Constant variables
Explanation:
Elaina's investigation lacked the critical ingredient of constant variables which are important components of every scientific investigation. In every research, there are 3 important variables, namely:
1. Dependent variables: the actual variable to be measured during the course of investigations and whose values are dependent on another variable (independent variable) supplied by the investigators.
2. Independent variable: one of the variables that are supplied by investigators whose values are often manipulated to see the kind of changes it will cause to the dependent variable.
3. Constant variables: other variables that are neither independent nor dependent but constant for all the various experimental groups in investigations.
Answer:
it will sink
Explanation:
water has density of 1 g/cm³
the object has density 2.5 g/cm³
It will sink in water as much more dens
Your pulse, is both at rest during exercise, this can reveal a heart attach and your aerobic capacity. Correct me if I'm wrong;)
Answer: cell membrane
such as water, micro-organism
physical process
simple diffusion, osmosis and filtration
such as potasssium permaganate in water,urea a liver waste diffuses from the body and the kidney help in filtering it out
physiological processs
active transport, phagocytosis and pinocytosis
such as soduim-potassium pump, exocytosis
Explanation: transportation in and out of cell is done in different ways listed above but a barrier to this movement is the cell membrane which is an outer covering of the cell. it protect the cell and only some materials can penetrate the cell membrane e.g micro-organism, water e.t.c. the various physical and physiological processes are the various ways substance cna be liquid, solid or gas are transported within or outside the cell e.g food
The ecosystem is defined as the stable interaction of biotic and abiotic factors in the surroundings. The intertidal is a zone of ecosystem found between land and water.
<h3>What is the Intertidal Zone of Ecosystem?</h3>
- The intertidal zone is defined as the point or site where the ocean meets the land between high and low tides. The zone can be found at any point where the land meets the ocean.
- The ecosystem found in the intertidal zones are estuaries, tide pools, and salt marshes.
Thus, the intertidal zone supports the ecosystem of marshes, tidal pools, and estuaries.
Learn more about the <u>ecosystem </u>here:
brainly.com/question/1673533
