Answer:
The bones in the forelimbs of penguins and seals are homologous and the flippers in penguins and seals are analogous.
Explanation:
The flippers of penguins and seals are analagous because they have similar functions but they did not come from the same evolutionary origin. Their separate ancestors evolved them to cope with their respective environments. However, the bones in the forelimbs of penguins and seals are homologous because they both inherited their forelimbs from common ancestors with the same bones in their forelimbs.
<span>False
Dog breeding would be an example of artificial selection. That is, is follows the same processes in selecting for certain mutations as natural selection but is guided and directed by humans. The primary difference is that artificial selection is much faster as it can be directed and focused with intelligent guidance rather than blind direction from natural evolution.</span>
Answer:
The correct answer would be active transport by proteins.
When a molecule is transported against the concentration gradient it requires cellular energy and the process is termed as active transport.
The energy is either provided by the hydrolysis of the ATP (adenosine triphosphate) in primary active transport or by the electrochemical gradient in secondary active transport
Active transport takes place with the help of integral membrane proteins or transport proteins which form carriers or channels across the membrane.
Examples may include a sodium-potassium pump, uptake of glucose in small intestine et cetera.
Answer:
C. when a portion of the moon passes through the earth's umbral shadow.
Explanation:
A partial lunar eclipse occurs when the Earth passes between the sun and moon but the celestial bodies are not arranged in a straight line. When that occurs, a small part of the moon's surface is covered by the darkest, central part of the shadow of the Earth called the umbra. The rest is covered by the outer part of the shadow, termed penumbra.
Answer:
1
Explanation:
During meiosis, a diploid cell ultimately forms four haploid gametes that go on to take part in fertilization. Because they are haploid. that means they have one copy of all of the chromosomes and the genes contained within them.
First, the DNA is replicated, and then two cell divisions take place form the haploid gametes. So at first, there are two copies of each gene, creating four after the DNA is replicated.
After the first cell division (meiosis I) there are two cells with 2 copies of every gene. Then to form the haploid gamete, there is another cell division (meiosis II) creating 4 cells each containing one copy of every gene
