Answer:
Does the organism have legs?
Does the organism reproduce asexually?
Can the organism ferment?
Is the organism infectious?
Explanation:
The questions HAVE to be yes or no, in order for it to effectively determine which species is which.
Claim: Whales evolved from land mammals to water mammals.
Evidence: The first whales evolved over 50 million years. One of the first whales, such as Pakicetus, were land animals with long skulls and carnivorous teeth, much like many adaptable land mammals back then and today.
All choices correctly describes physical barriers. Physical barriers after composed of tight junctions wherein it is difficult for the bacteria and viruses to penetrate. Examples of these physical barriers are the skin and the mucous membranes and these work in conjunction with secretions like tears and mucus (as tears and mucus contain IgA, a special type of immunoglobulin that is secreted to fight harmful organisms).
Make four different test groups.
Test 1: Add 10mL of A to 10mL of B, and insert substance X into the reaction. Record the time.
Test 2: Add 10mL of A to 10mL of B, and insert substance Y into the reaction. Record the time.
Test 3: Add 10mL of A to 10mL of B, and insert substance Z into the reaction. Record the time.
Test 4: This is your control group. Only add 10mL of A to 10mL of B, then record the time for the reaction to occur.
The catalyst is which ever substance caused for the reaction time to speed up. I hope that this helped! Please leave brainliest!
