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
boyakko [2]
2 years ago
8

Reptiles lay eggs as a means of reproducing, while mammals give birth to live young.

Biology
1 answer:
spin [16.1K]2 years ago
5 0

Answer:

The long development time can be risky for both the embryo and the mother.

Explanation:  The long development time can be risky for both the embryo and the mother.

You might be interested in
Check all that apply as characteristics of myelinated axons. Check All That Apply Myelinated axons transmit nerve impulses via c
stiv31 [10]

Answer:

Myelinated axons utilize fewer voltage-gated channels than unmyelinated axons of the same length and diameter.

Myelinated axons are more energy efficient than unmyelinated axons.

Explanation:

Neurons are cells that specialize in transmitting messages to each other using a type of electrical signal. These signals carry information from outside your body to the brain, while others are the instructions for the various organs, glands and muscles to carry out functions.

Neurons receive these signals from other neighboring neurons through their dendrites. The signal then travels to the soma of the neuron, which is the main body of the cell, and finally<u> travels down the axon to the synaps</u>e (space between the end of a neuron and another cell). The axon is a neuronal extension through which the electrical signal travels, extending from the soma to other neurons.

<u>There may be layers of myelin, which consist of a layer of fat, covering the axons and where they have the function of acting as insulators to help keep the electrical signal inside the cell, which makes it move faster increasing the speed of transmission of the nerve impulse</u>.

1) Myelinated axons transmit nerve impulses via continuous conduction. FALSE. In the axon, nodes of Ranvier are found at regular intervals along the length of the axon in the myelin sheath that surrounds it. These are small spaces that expose the axon membrane to the extracellular fluid and serve to allow the nerve impulse to travel faster, in a jumping manner and with less chance of error.

2) Myelinated axons transmit nerve impulses in the same manner as unmyelinated axons. FALSE. In an unmyelinated axon, the movement of voltage across the membrane is due to ion flux that is limited by the time it takes for sodium ions to diffuse into the axon. Myelinated axons conduct faster because they are shorter than unmyelinated axons. In the latter, transmission is continuous but slower.

3) Myelinated axons utilize fewer voltage-gated channels than unmyelinated axons of the same length and diameter. TRUE. The action potential conduction jumps from node to node, thereby they need fewer voltage-gated channels. Unmyelinated axons need voltage-gated channels in along the entire axon.

4) Myelinated axons are more energy efficient than unmyelinated axons. TRUE. The rate at which sodium input through one node can depolarize the axon at the next node is related to the current and capacitance across the membrane. Myelinated axons have faster action potential conduction because it jumps from node to node, thereby they use less energy because they don't have to travel the entire length.

5) Myelinated axons would be unaffected by diseases that attack the CNS. FALSE. For example, Multiple sclerosis (MS) is a demyelinating disease of the CNS in which the immune system attacks the myelin sheath or the cells.

6 0
3 years ago
Which of the following properties describes a direct current system but not an alternating current system?
Alika [10]

Answer:

Which of the following properties describes a direct current system but not an alternating current system?

The current always flows it the same direction.

Explanation:

When current flows in the same direction, it is described to have flow in a direct manner rather than an alternate system

8 0
3 years ago
What causes reversal of biochemical reactions?
Alexxandr [17]

A and B can react to form C and D or, in the reverse reaction, C and D can react to form A and B. This is distinct from reversible process in thermodynamics.

Weak acids and bases undertake reversible reactions. For example, carbonic acid: H2CO3 (l) + H2O(l) ⇌ HCO−3 (aq) + H3O+(aq).

The concentrations of reactants and products in an equilibrium mixture are determined by the analytical concentrations of the reagents (A and B or C and D) and the equilibrium constant, K. The magnitude of the equilibrium constant depends on the Gibbs free energy change for the reaction.[2] So, when the free energy change is large (more than about 30 kJ mol−1), then the equilibrium constant is large (log K > 3) and the concentrations of the reactants at equilibrium are very small. Such a reaction is sometimes considered to be an irreversible reaction, although in reality small amounts of the reactants are still expected to be present in the reacting system. A truly irreversible chemical reaction is usually achieved when one of the products exits the reacting system, for example, as does carbon dioxide (volatile) in the reaction

7 0
3 years ago
What are the two factors that influence gravity? 1)Speed and distance. 2)Color and shape 3)Neight and shape. 4) Nass and distanc
Gwar [14]
I believe it’s either 1 or 4
7 0
3 years ago
Which of these is an example of land contamination?
OleMash [197]

this answer is B. full landfill and another answer is Agricultural runoff (apex)


7 0
3 years ago
Read 2 more answers
Other questions:
  • Does rabbits, worms, and flys have cell walls?
    15·2 answers
  • Fertilizers containing radioactive nitrogen compounds are used in growing experimental plants. In which molecules would these co
    13·1 answer
  • Why is meosis important
    15·2 answers
  • Which of the following describes an innate animal behavior
    11·1 answer
  • Eukaryotic chromosomes are composed of ____________ , a combination of both DNA and structural proteins. These structural protei
    9·1 answer
  • What organic molecules are in chicken
    14·1 answer
  • Will turtles become extinct
    5·2 answers
  • According to the food web shown, which group below lists only secondary consumers?
    15·1 answer
  • Infiltration is the process that helps to add water to the Earth's
    15·1 answer
  • What is climate? how is earth climate changing? What are the natural and human factors that affect climate?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!