The Genetic Variation, Mutagens produce the greatest variety. This category includes radiation (UV light, Xrays), chemical, etc. <span>They change DNA/RNA, thereby increasing the number of mutations, which in turn, leads to producing the greatest variety.</span>
Answer:
Animals, fungi, plants, even bacteria can be considered fossils. Two features that classify an archaeoptericus as a reptile would be its long bony tale and a full set of teeth. Comparing to a bird, this creatures exhibits long feathered wings and claws.
Answer:
The length of time for the processes of weathering and erosion to occur are very long, however some quick.
Depending on the force, erosion can happen quickly or take thousands of years.
However weathering usually takes a long time.
The statement is true. The male and female embryos anatomically look same at five weeks of pregnancy.
In the 4th week of pregnancy the blastocysts gets implanted in the walls of uterus and develops into the placenta and then becomes an embryo. The embryo is considered starting from the point when the amniotic sac develops which is at the starting of the 5th week of pregnancy. By the 12th week of pregnancy the organs are developed such as arms and legs but the brain and spinal cord keeps developing throughout the pregnancy.
The second trimester begins at the 13th week of the pregnancy and by the 14th week the gender can be identified. So the male and female embryos are anatomically same at 5th week of the pregnancy.
<h3><u>Answer;</u></h3>
There will be <u>4 different combination of chromosomes</u>
<h3><u>Explanation;</u></h3>
- <em><u>A diploid cell is a cell that contains two sets of each chromosomes; thus a diploid cell with two pairs of homologous chromosomes has four chromosomes.</u></em>
- <u><em>Gametes are produced through meiosis which is the type of cell division in which a parent cells divides into four daughter cells each with half the number of chromosomes as the parent, that is the cell are haploid.</em></u>
- Therefore,<em><u> </u></em><em><u>a diploid cell with two pair of homologous chromosomes will produce four haploid cells after meiosis each with two chromosomes.</u></em>
