Answer:
A. active transport
Explanation:
active transport is the movement of a substance across a membrane against its concentration gradient.
hope it helps you
Answer:
Ecology can be described as the branch of biology which is related to the study of the interaction of an organism with other organisms and the environment. This study is important because both biotic and abiotic factors play a vital role in the existence of an organism. Abiotic factors such as soil type, food resources, water resources, amount of sunlight reflect which organisms will be able to live in an area. Biotic factors also influence the life of an organism just as the abiotic factors do.
Answer:
Prokaryotic cells (bacteria) lack a nuclear envelope; eukaryotic cells have a nucleus in which evolution was thus reached in the early 1980s, when it was discovered an early stage of chemical evolution is thought to have been based on chloroplasts are still encoded by the organelle genomes.
Explanation:
The iron nail produces electric current that attracts the pieces of iron is the right one.
Answer:
The correct answer would be - 0.1 a, 0.9 A
Explanation:
The initial population of the colonist had free earlobes which are represented by A here as it is dominant and attached is represent by a. purebred dominant would have AA.
Frequency of allele A =
8 pure dominant and 2 heterozygous dominant presents in the population
So, frequency of A allele = 8 x 2 + 2 / 20
= 18/20
= 0.9
As we know
p+q=1;
frequency of allele "a" = 1-p
= 1-0.9
= 0.1
