Answer: phase 1
A cardiac action potential can be divided into phase 0-4. In phase 0, the sodium channel is opened and sodium will come into the cell which causes a rapid depolarization. In phase 1, the fast sodium channel is closed and K+ channel starts to be opened which makes a small repolarization.
The answer is <span>Fish are ectothermic and lay eggs to reproduce, while mammals are endothermic and give live birth to offspring.
Through the elimination process:
</span><span>* Fish are <u>invertebrates</u> and have scales and paired fins, while mammals are vertebrates and have fur or hair. - Fish are vertebrates!
</span><span>* Fish are <u>endothermic</u> and have gills, while mammals are <u>ectothermic</u> and have lungs. - Fish are ectothermic (cold-blooded), and mammals are endothermic (warm-blooded)!
</span>* <span>Fish have streamlined bodies and <u>three-chambered hearts</u>, while mammals are <u>bipedal</u> and have four-chambered hearts. - Fish have four chambered hearts and not all mammals are bipedal!
This leaves choice: </span><span>Fish are ectothermic and lay eggs to reproduce, while mammals are endothermic and give live birth to offspring. All of this is true, but it should be taken into consideration that some fish give live birth and some mammals lay eggs, but this is the most possible choice among all mentioned.</span>
The answer is; C
Ozone is a layer in the stratosphere that absorbs UV light from the sun and protects life on earth. UV can cause damage to the genetic material of cells. The other is greenhouse gases that trap infrared heat within the lower atmosphere and cause global warming of the planet.
Explanation:
Template: T, A, C, G
Pairing: T- A, A-T, C-G, G-C
Answer: adenine, thymine, guanine, cytosine
Further explanation:
Nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.
Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar, these nitrogen bases which may contain single to double bond ring.
DNA stores all of an organism’s genetic information. Its molecules comprise the nitrogenous bases Guanine, Adenine, Cytosine and Thymine. These pair up as base pairs due to their varied structure- largely influenced by the location of N molecule ;
- cytosine and thymine are formed from pyrimidines- N at position 1 and 3 of a fused ring;
- Guanine and adenine are formed from organic compounds called purines (pyramidines fused to another organic ring of imidazole)
- Each base pair contains a purine and pyrimidine joined via hydrogen bonding e.g. A-T & G-C and are called base complements.
In certain combinations, these bases form codons which act as instructions for protein synthesis. Codons are three nucleotide bases encoding an amino acid or signal at the beginning or end of protein synthesis.
Learn more about transcription at brainly.com/question/11339456
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
most of a atoms mass is in the nucleus of the atom:) hope this helps you