United States Deforestation Rates & Statistics | GFW. In 2010, United States had 252Mha of natural forest, extending over 29% of its land area. In 2020, it lost 1.59Mha of natural forest, equivalent to 683Mt of CO₂ of emissions
Mars and Moon are the locations from which meteorites would come.
Option (c);
<u>EXPLANATION: </u>
- The meteorites found on Earth look like martian crystal rocks.
- These might be first ejected into space during a collision of an asteroidal object with Moon or Mars and then it got into the Earth orbit because of the force produced during the collision.
- There are around seventy meteorites recognised to have come from the planet Mars till up to the present date.
- There are three types of meteorites such as Martian meteorites and a sample of two lunar meteorites.
- To identify the origin of the meteorite, the scientist tries to identify the type of rock followed by analysing the chemical composition and then try to identify its age.
Answer:
A) one human somatic cell
Explanation:
A human genome is a complete set of DNA in somatic cell and it contains 23 chromosome pairs (nuclear genome). Beside nuclear genome cell also have mitochondrial genome. Unlike somatic cells (diploid-two sets of chromosomes, one from mother and one from father), germ cells (egg cell and sperm cells) are haploid, have only one set of chromosomes.
Human genomes include genes that are protein-coding but also noncoding DNA.
Answer: The father determines the biological sex of a baby
Explanation: Human beings have two sex chromosomes, males have XY chromosomes whereas females have XX chromosomes. During fertilization, an egg from a woman fuses with a sperm cell from a man to form a zygote. Women have two X chromosomes (XX) and any point in time they can only release an egg bearing an X chromosome but males have one X and one Y chromosome, therefore they can either release a sperm cell with an X chromosome or a sperm cell with a Y chromosome. When an egg with X-chromosome fuses with a sperm cell with an X chromosome, the resulting baby is a female but when an egg with an X chromosome fuses with a sperm cell with a Y chromosome, the resulting baby is a male.
What makes the difference in both sexes is the Y chromosome from the man, therefore the father determines the biological sex of a baby.