1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marina CMI [18]
3 years ago
6

1. Introduction:

Biology
1 answer:
inna [77]3 years ago
5 0

Answer:

1. Introduction

     a. The<em> Tiktaalik </em>is a fossil that<em> </em>existed about 12 million years before the first tetrapods.

    b. The items homeostatic mechanisms show are continuity and change.

2. Continuity

       a. Our Excretory system is the system responsible for the discharging of waste products from the body.

Explanation:

1 a. Tiktaalik fossil (<em>Tiktaalik roseae</em>), also known as the "fishapod," is a 375 million year old fish fossil  discovered in 2004 in the Canadian Arctic. The fossil displays a mixture of fish and amphibian traits (i.e the pioneer tetrapods). Those tetrapod features in the <em>Tiktaalik</em> marks the earliest appearance of these features in fossil record.

Importance: The discovery of the <em>Tiktaalik</em> fossil explains  a crucial point in the history of life on Earth: i.e it sheds light on when the very first fish ventured out of the water onto land.

b. Continuity in homeostasis implies common ancestry or homology. For example the excretory system in flatworms, earthworms and vertebrates basically serves the same function, and has remained unchanged (save for a few tweaks), over the last few million years.

Change implies changes in the environment which causes changes in homeostatic mechanisms. For example the transition of aquatic animals from water to land which necessitates changes in their respiratory mechanisms.

2. Continuity

a. The excretory system is the system of an organism's body that is responsible for the function of excretion, the process of eliminating bodily wastes produced by homeostasis.

The mechanisms of homeostasis are body temperature, body fluid composition, blood sugar, gas concentrations, and blood pressure.

The organs that are involved in this process of waste elimination are the sweat glands, the liver, the lungs and the kidneys.

You might be interested in
. A Darwinist is likely to believe that A) heritable traits cannot be altered by experience. B) all human behavior has its roots
barxatty [35]

Answer:

A) heritable traits cannot be altered by experience

Explanation:

This is because the Darwinist believe that heritable traits were  acquired from previous generation not  from practise  or  learning which may  develop to experience with time.He believed that certain selective pressures must have acted  or selected these  organisms to possess these heritable characteristics, and can not be altered by experience  whicg is acquired with age.

He should conclude therefore  that variation in the organisms which possess these characteristics should be the main factor which gives them selective advantages to inherit these traits compare to others in this same   surrounding environment  Therefore  he will discard the influence of environment.

4 0
3 years ago
2. There are many different types of cancer.
lina2011 [118]

Answer:

i think its a im not sure though

7 0
2 years ago
The issue of high cholesterol can sometimes run in families. If an individual has two normal alleles, then he is phenotypically
statuscvo [17]
In the case of the gene that determines high cholesterol in the blood, the two alleles express incomplete dominance.
What this means is that the dominant allele is not completely dominant over the recessive allele. If the allele was completely dominant, even one allele would be enough to determine the individual's trait as dominant. But in the case of incomplete dominance between the alleles, the heterozygous individuals that have one dominant and one recessive allele are an ''in between'' phenotype.
5 0
3 years ago
Read 2 more answers
What is the molar mass of a substance?
Ipatiy [6.2K]

Answer:

The correct answer is: the mass in grams of one mole of a substance

Explanation:

The molar mass of a given substance corresponds to the mass of one mole of this in grams. Corresponds to a physical property of the substance. Example: the molar mass of water (H20) is:

Molar mass H20 = (Mass H) x 2 + Mass 0 = 2 x 1 g + 16 g = 18 g / mol

7 0
3 years ago
Read 2 more answers
What happens to the effenciency of the exchange of oxygen in the human body at a high altitude​
Daniel [21]

Answer:

The effiency decreases at higher altitudes

Explanation:

The higher up a person is on a mountain, the thinner the air is due to the lack of plants that can grow. An example of this is Mount Everest. At a certian point on the mountain, called the "Death Zone", the air is too thin to supply enough oxygen to the human body to survive. That's why they bring oxygen tanks with them on their adventures.

7 0
3 years ago
Other questions:
  • How do interactions help dandelions to survive?
    12·1 answer
  • Which type of epithelium is present where easy exchange of materials out of the blood is most important, such as that in the lin
    13·2 answers
  • You can make a cell extract that is able to perform glycolysis in vitro (in a test tube) if glucose is added. Arsenate is a pote
    15·1 answer
  • There are multiple types of mimicry, where animals imitate other animals in order to gain protection from predators or fool prey
    12·1 answer
  • What element on the periodic table has 85 protons and 86 electrons?<br> PLEASE HURRY!
    15·1 answer
  • For evolution to be occurring, natural selection must also be occurring.<br> a. True<br> b. False
    5·1 answer
  • The galactose derivative that enters the glycolytic pathway is 2‑phosphoglycerate glucose fructose‑1,6‑bisphosphate fructose‑6‑p
    12·1 answer
  • In which structure does sperm develops
    7·2 answers
  • All organisms are
    12·2 answers
  • Why is meiosis important for sexua<br> reproduction?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!