answer.
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
Ymorist [56]
2 years ago
15

Tetrapods (amphibians, reptiles, and mammals) all share a common ancestor. Which of these traits was NOT present in the common a

ncestor of all tetrapods (amphibians, reptiles, and mammals):
a. Amniotic egg
b. Vertebral column
c. Digits
d. Paired appendages
e, Jaws
Biology
1 answer:
zloy xaker [14]2 years ago
5 0

Answer:

Amniotic egg.

Explanation:

Amniotic egg is the advanced evolutionary character first appeared in reptiles. These amniotic egg allows the reptiles to colonize on the dry lands. This amniotic egg is covered by hard shell in birds and reptiles.

The amniotic egg is not present in fishes and frogs as they lay their eggs in water. The amniotic egg is present in reptiles, birds and mammals. The vertebral column, paired appendages, jaws and digits are present in frogs, reptiles, birds and mammals.

Thus, the correct answer is option (a).

You might be interested in
What are the frogs in the conservation center fed?
Tanya [424]
Presumably whatever their nutrition and health requires, for instance, if a tree frog requires fruit flies to maintain a healthy and balanced diet, then the conservation center probably feeds their tree frogs fruit flies.
6 0
2 years ago
Read 2 more answers
Promoters and enhancers are DNA sequences both bound directly by ____________.
babymother [125]

Answer:zbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Explanation:

5 0
2 years ago
Read 2 more answers
what questions and answers lead you to the decision that an organism is from the kingdom Archaebacteria
Arte-miy333 [17]

Explanation: we will conclude this by the following characteristics:

1.organims that lack a proper nucleus.

2.they have membrane bounded organelles

3.they are tiny single cell oraganisms which cannot be seen by naked eye.

4.they are the oldest livinh organisms on earth

5.they are present in very harsh conditions like volcanic vents or at the bottom of the sea

5 0
2 years ago
Which excrine structure Is involved in the digestion of fat
cestrela7 [59]
The answer is:  The <span>exocrine structure that is involved in the digestion of fat is </span>liver.

<span>>The liver plays an vital role in the digestion and processing of proteins, fat and sugar.
</span><span>>The liver plays a significant role in fat digestion as well as the production of fats needed for the function of different organs of the body</span>
3 0
2 years ago
Alcohol dehydrogenase (ADH) is an enzyme that aids in the decomposition of ethyl alcohol (CH3OH) into nontoxic substances. Methy
KonstantinChe [14]

Answer:

D.Competitive inhibition will decrease because the proportion of the active sites occupied by substrate will increase.

Explanation:

Methyl alcohol is a competitive inhibitor of ethyl alcohol. This means that both of them compete with each other for the same enzyme (ADH). Methyl alcohol leads to poisoning because it is converted to toxic formaldehyde in body. It can be treated by increasing the concentration of ethyl alcohol.

More ethyl alcohol (substrate) will reduce the competitive inhibition by methyl alcohol (inhibitor). This will happen because a substrate needs active sites on an enzyme to attach to it. If ethyl alcohol is increased in concentration, it will occupy more active sites and their availability to methyl alcohol will be reduced. Thus, the enzyme will not be able to act on methyl alcohol.

8 0
2 years ago
Other questions:
  • The range of cells receiving copied content is called the ____ area. select one:
    13·1 answer
  • During tissue repair, the clot is first replaced by _____, a delicate connective tissue that consists of fibroblasts, collagen,
    10·1 answer
  • A. what are the primary abiotic factors that will affect life underwater?
    10·1 answer
  • Restrictions that are used in solver to limit the results are called
    10·1 answer
  • A nurse on a psychiatric unit is planning care for an unconscious teenage client who ingested a non-corrosive substance that has
    10·1 answer
  • After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the re
    15·1 answer
  • Jake designed an experiment to demonstrate interactions between Earth systems. He tied a clear plastic bag firmly around some le
    8·2 answers
  • How many of the following factors would affect the permeability of the cell membrane?
    7·1 answer
  • Amed watched a video of someone using a jetpack rocket at a lake Water is pumped out of the lake into the jetpack, and then the
    15·1 answer
  • A phospholipid . Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a has bot
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!