There are 4 nitrogenous bases in DNA. Adenine pairs with thymine, and Guanine pairs with cytosine. A Dna Nucleotide consists of a 5 carbon sugar, a phosphate group and a nitrogenous base. These bases are paired up by weak hydrogen bonds, so when they have have to replicate, the enzyme helicase can easily unzip the Dna. <span />
Answer:
1. A. digestive system
B. excretory system
2. A. nervous system
B. respiratory system
Explanation:
1. the digestive system helps digest food and the excretory system helps get rid of waste.
2. asthma is considered a respiratory disease.
hope it helped. :) please mark as brainliest if it did. thanks in advance. :)
TRUE, back then medications were not as advanced as they are today and a simple flu could be life threatening
<span>plasmogamy is the stage that this occurs </span>
Answer:
1.50 cal
Explanation:
Given data:
Mass of water = 300 g
Initial temperature = 20 °C
Final temperature = 25 °C
Calories needed = ?
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Solution:
ΔT = T2 - T1
ΔT = 25 °C - 20°C
ΔT =
Q = m.c. ΔT
Q = 300 g . 4.18j/g. °C . 5°C
Q = 6270 J
J calories:
6270 / 4184 = 1.50 cal
