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
saveliy_v [14]
3 years ago
12

During which period did the first land vertebrates appear?

Biology
1 answer:
julsineya [31]3 years ago
6 0
The answer is D. permian
You might be interested in
The pathogen for ringworm is __________.
Shalnov [3]
Fungus causes ringwormand impact on human health
3 0
3 years ago
How does the liver help in maintaining homeostasis
irga5000 [103]

Answer:

The liver plays a major role in blood glucose homeostasis by maintaining a balance between the uptake and storage of glucose via glycogenolysis and gluconeogenesis. The liver is the primary organ for glucose metabolism.

Glycogenolysis: Glycogenolysis is the biochemical pathway in which glycogen breaks down into glucose-1-phosphate and glycogen.  

Gluconeogenesis: Gluconeogenesis is the synthesis of glucose from non-sugar precursors, such as lactate, pyruvate, and the carbon skeleton of glucogenic amino acids.

5 0
3 years ago
What are two ways that prokaryotes provide nutrients to humans
BaLLatris [955]

1. make some vitamins

2. break down some food

Hope this helps!

-Payshence

6 0
3 years ago
Explain why facilitated diffusion may need to occur and in what direction the particles diffuse in. Identify the molecules that
Goryan [66]

Answer:

Sometimes molecules cannot move through the cell membrane on their own. These molecules need special transport proteins to help them move across the membrane. Facilitated diffusion is the diffusion of substances with the help of transport proteins in the plasma membrane. These special proteins are called channel proteins or carrier proteins, and they are attached to the cell membrane. In fact, they go through the cell membrane, from the inside of the cell to the outside. Facilitated diffusion is used for molecules that cannot diffuse rapidly through cell membranes on their own, even when the molecules are moving from high to low concentration areas. An example is the sugar plants and animals use for energy, called glucose. Even though facilitated diffusion involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient so it does not require the use of cellular energy.

6 0
2 years ago
Directions: Consider a pedigree that is tracking an autosomal recessive trait, where two recessive alleles (tt) result in the in
Talja [164]

Answer:

I think this should be the chart you were interested in...

Explanation:

                                          Individual             Shape in              shaded

                                          phenotype           pedigrees

Male with gen. TT             PTC taster             square                No

Male with gen. Tt              PTC taster             square                No

Male with gen. tt               Non-taster             square                Yes

Female with gen. TT        PTC taster              Circle                  No

Female with gen. Tt         PTC taster              Circle                  No

Female with gen. tt          Non-taster              Circle                 Yes

*gen- genotype

4 0
2 years ago
Other questions:
  • What do u know about earth day?
    6·2 answers
  • The interior of a cell is called the
    6·2 answers
  • What are some ways to prevent wind erosion in a dry sand area
    11·1 answer
  • 1. What elements make up carbohydrates?
    8·1 answer
  • To neutralize all the negative charge from an object, simply touch it with _________.
    5·1 answer
  • Helpppppp !!!!!!!!!!​
    8·1 answer
  • The most common compounds in organic sediments are *
    5·1 answer
  • Describe the non-living components of the environment in an ecosystem?
    10·1 answer
  • How much force is needed to make a 12 kg object accelerate at 3 m/s
    14·1 answer
  • What do plants make through the process of photosynthesis
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!