What would become fossils first a fish who died on the ocean floor or a mouse who died on the forest floor

DedPeter [7]

thymus plays important role by development of a normal, healthy immune system. thymus function is to generate mature lymphocytes

In other words, white blood cells that help fight of illness in the immune system.

sorry if I am wrong.

4 0

3 years ago

Which of the following best describes an atom

Angelina_Jolie [31]

C. your core will be made of protons will be made of protons and neutrons while being surrounded by "shells" of electrons.

5 0

3 years ago

Read 2 more answers

11. What is speed?

Harrizon [31]

11. In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

12. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector. In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in time (Δt).

13. Here we will learn the mathematical relation between the speed, distance and time. The speed of a moving body is the distance travelled by it in unit time. If the distance is in km and time is in hours, then the speed is km/hr. If the distance is in m and the time is in seconds, then the speed is m/sec.

14. Average speed is the distance traveled divided by elapsed time. We have noted that distance traveled can be greater than displacement. So average speed can be greater than average velocity, which is displacement divided by time

15. Both have the same average speed, so neither is the fastest. (Please see the solution in the picture)

16. Acceleration is a vector quantity which is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

3 0

3 years ago

The hormone oxytocin aids the birth process by stimulating:__________

zavuch27 [327]

Answer:

The hormone oxytocin aids the birth process by stimulating: uterine wall contractions.

Explanation:

Oxytocin is a hormone that is released naturally in the body of women and that intervenes in certain physiological processes, activating behaviors at a mechanical level in specific organs such as the uterus and the breasts. In the case of the uterus, oxytocin stimulates and maintains the contraction of the smooth muscle of the uterus during labor and delivery, that is, it is responsible for the existence of contractions, which occur during intercourse, due to the distension of the uterus that occurs produced during labor.

6 0

3 years ago

For a series of experiments, a linkage group composed of genes W, X, Y and Z was found to show the following gene combinations.

Gelneren [198K]

Complete question:

For a series of experiments, a linkage group composed of genes W, X, Y and Z was found to show the following gene combinations. (All recombinations are expressed per 100 fertilized eggs). Construct a gene map. Determine the sequence of genes on the chromosome.

w-x = 5
w-y = 7
w-z = 8
x-y = 2
x-z = 3
y-z = 1

Answer:

The sequence of genes on the chromosome is:

----W-------------------------X-----------Y------------Z---

Explanation:

First, we need to know that 1% of recombination frequency = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

The map unit is the distance between the pair of genes for which every 100 meiotic products, one results in a recombinant one.

The recombination frequencies between two genes determine their distance in the chromosome, measured in map units. So, if we know the recombination frequencies, we can calculate distances between the four genes in the problem and we can figure the genes order out. This is:

Recombination frequencies:

1% of recombination frequency = 1 map unit (MU)

w-x = 5 MU
w-y = 7 MU
w-z = 8 MU
x-y = 2 MU
x-z = 3 MU
y-z = 1 MU

Now that we know the distances, we just need to analyze them to find out the correct order of the genes. First, we can look for the biggest distance, which tells us which genes are located in the extremes. w-z distance is the biggest one, so these two genes are in the extremes of the chromosome segment. ---W----------------------------------------------Z---

∫---------------------8 mu-------------------∫

The rest of the genes are located in the middle between these two.

The second biggest distance is between w-y (7 mu). Y is also 1mu distant from Y. 7 mu + 1 mu = 8 mu. So, Y is located closer to Z.

---W-------------------------------------Y------------Z---

∫-----------------------7 mu---------∫∫---1 mu--∫

∫---------------------8 mu-------------------------∫

w-x = 5 mu, and x-y = 2mu, so x is located between w and y. The sum of these distances equals the distance w-y ( 5 mu + 2 mu = 7 mu). So,

---W-------------------------X----------Y------------Z---

∫-----------5 mu -------∫∫--2mu--∫

∫-----------------------7 mu---------∫∫---1 mu--∫

∫---------------------8 mu-------------------------∫

We know that the distance between x-y equals 2, and the distance between y-z equals 1. Also, the distance between x-z equals. This leads us to assume that Y is located between X and Z.

----W-------------------------X-----------Y------------Z---

∫-----------5 mu -------∫∫--2mu--∫∫----1mu---∫

∫------ 3 mu-----------∫

∫-----------------------7 mu---------∫∫---1 mu---∫

∫---------------------8 mu--------------------------∫

7 0

3 years ago