In 1668, Francesco Redi performed a series of experiments on spontaneous generation. In one experiment, he began by putting similar pieces of meat into eight identical jars. Four jars were left open to the air, and four were sealed with lids. The exposed meat attracted flies, he monitored the jars and recorded whether or not maggots (young flies) appeared in the meat. What must a hypothesis be to be a viable hypothesis? It has to be testable. State a hypothesis that Redi would have been testing with his initial experiment where he was using open and sealed jars.

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

You have 2 plants of the same type and same size, same amount of leaves. one of them is put inside the house and the other one is put in the balcony. you water them saturday, one plant with 200 ml and the other with 400 ml of water. which one of your plants need less water? explain.

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte