Answer:
(B) Thomas Malthus, who studied population growth
Explanation:
Thomas Malthus published his essay entitled "An Essay on the Principle of Population As It Affects the Future Improvement of Society" in 1798. Accordingly, the capacity of populations to increase geometrically leads to struggle for food, shelter and other resources. These negative processes put a check on the population size.
Darwin was influenced by the idea of ability of populations to exhibit exponential growth and struggle for existence. On the basis of the essay by Thomas Malthus, Darwin proposed that genetic variations allow only individuals with beneficial traits to survive the struggle.
Answer:
Location and structure of Merkrl's discs and Pacinian corpuscles.
Explanation:
Merkel's disc : this is located in the upper layers of the skin near the base of the epidermis. They are densely distributed in the fingertips and lips.
Pacinian corpuscles : they are nerve endings in the skin responsible for sensitivity to vibration and pressure. They are large and fewer in number. It is approximately oval shape and 1mm in length.
<span>Cell membranes are semipermeable allowing oxygen to pass through while charged ions cannot.</span>
The placenta, because it carry's all the nutrients from the mother to the baby
Answer:
Answer is C
Explanation:
the first kingdom is Plantae since they have chloroplasts. The second kingdom would be Fungi since they have walls but no chloroplasts. and the third is Animalia because they have none of the above.