1.C
2.B
3.C
4.A
5.D
6.B
7.D
8.D
9.C
10.A
Neutral potassium also contains 19 electrons and 21 neutrons.
Answer:
1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).
2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.
Answer:
1. It is now illegal to import or purchase Burmese pythons in Florida. Probably, at some point, python owners who no longer wanted to care for them let them go in the Everglades. By the mid-1990s, the pythons had established a breeding population.
2. There have been no human deaths from wild-living Burmese pythons in Florida. Overall, the risk of attack is very low. ... The simplest and most sure-fire way to reduce the risk of human fatalities is to avoid interacting with a large constrictor.
Explanation:
Burmese pythons are not poisonous snakes, however they are constrictors, coiling around their prey and squeezing the life out of it. The officials in the state of Florida are extremely concerned about the invasion of these large snakes and their ability to take over most of the Everglades.
Answer:
B There will be blue colonies only
Explanation:
This screen in called the blue white screening. This is a rapid test that allows scientist to check for their insert of choice in the colonies at a glance. The concept is that where the insert is located the <em>lac Z </em>gene in the vector is interrupted and therefor Xgal, a reporter can be produced. Where there are blue colonies being formed the plasmid has self-ligated and the <em>lac Z</em> gene is not interrupted and the X-gal can be formed rendering a blue color.
