<span>1. taxonomy is a branch of science concerned with classification of organisms
hence (5) Classification matches with Taxonomy
2.Species is the biological term referring to the basic unit (smallest rank) of classification:
hence (1) smallest unit of classification matches with Species
3.Arthropods are animals which have an exoskeleton, segmented body and paired jointed legs
hence;
(2) segmented digestive system, appendages, matches with Arthropoda and Animal characteristics
4. Tracheophyta refers to green plants which have conductive tissues (vascular tissues) for conducting water and nutrients through them.
The description " (4) Green, conductive tissue, seeds, flowers, and (7) largest division of plants term, they match with Tracheophyta and Plant Characteristics
5. in taxonomy (organisms classification) the Order, ranks in between Class and Family, hence of families makes an Order.
Therefore, (6) groups of families matches with Order</span>
There is only one structure feasible for a tetrahedral molecule with such a formula, under the supposition that A is in the center of the tetrahedredon. In this case X and Y are in the vertices of the tetrahedron.
If you draw several figures changing the position of the X's and the Y around the center (A), you will see that all are equivalent.
This is the case of the product CH3Cl, named chloromethane, which, for the same reason given above, does not have isomers.
Usually and animal that catches its pray also eats dead animals is classified as carnivore. Do you need clearer classification?
Light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in a vacuum in one year.
While there is no authoritative decision on which year is used, the International Astronomical Union (IAU) recommends the Julian year.
A light-year is equal to 9,460,730,472,580.8 km (about 9.461 Pm; 5,878,625,373,183.61 statute miles; about 63,240 astronomical units or about 0.3066 parsecs.
The exact length of the light-year depends on the length of the reference year used in the calculation, and there is no wide consensus on the reference to be used.
The figures above are based on a reference year of exactly 365.25 days (each of exactly 86,400 SI seconds).
A few examples of distances for light to travel are: Reflected sunlight from the Moon's surface takes 1.3 seconds to travel the 4.04 × 10-8 light years to Earth.
It takes 8.3 minutes for light to travel from the Sun to the Earth (a distance of 1.58 × 10-5 light-years).
The most distant space probe, Voyager 1, was 13 light hours (only 1.5 × 10-3 light years) away from Earth in September 2004.
It took Voyager 27 years to cover that distance.
The nearest known star (other than the Sun), Proxima Centauri is 4.22 light years away.
The center of our galaxy, the Milky Way, is about 26,000 light years away.
Vesicular breathing sounds are result from or are produced because of a person's need of breathing. In order for a person to breathe, gas exchange is needed to have an oxygen to breathe and to regulate the blood flow. To do this, the lungs is needed and with the help of their components namely the aveolar sacs, which enables to fill the air in the lungs, resulting to or producing vesicular breathing.
