Instructions for an inherited traits are called genes.
<h3><u>Answer</u>;</h3>
A. Pressure causes water and dissolved substances to filter through capillary walls of the glomerulus.
<h3><u>Explanation;</u></h3>
- <em><u>During filtration the flow of blood in the glomerulus creates hydrostatic pressure in the glomerulus which forces molecules through the glomerular filtration membrane. </u></em>
- Normal filtrate contains of water, glucose, amino acids, urea, creatinine, and solutes such as sodium chloride, calcium, potassium and bicarbonate ions.
Answer:
Amount of food. She needs to varry the amount of plant food among the different groups so that she can tell how the amount of plant food affects number of beans produced.
The main arctic animals which will be affected by climate change are polar bears, seal, seabirds, and walrus.
Polar bears: Sea-ice cover at summer may be completely loss and this inhibits polar bears traveling from region to another to give birth — making the survival of mothers and cubs to be vulnerable.
Seal: Seal species are living mainly on ice and with the climate changing, ice cover also reduces — creating a not so comfortable environment for seal. They use sea ice as a feeding ground, birth place and a place where for raising their young, as well as for resting.
Seabirds (auks and gulls): They eat fishes and scavenge on top of sea ice, so when sea ice reduces so as their source of food and population.
Walrus: Uses sea ice as a feeding ground and source of food is on the sea floor while using sea ice as a diving platform. So any loss of sea ice cover, also affects their way of feeding and eventually, their population.
Overall, melting of ice affects salinity and temperature of surface waters, thereby affecting other marine life.
1. A human eats a deer. Which of these terms applies to the relationship between the human and the deer?<span>
Answer: predation
2.</span>Humans and sharks both eat fish. Which of these terms applies to the relationship between the human and the shark?
Answer: Competition
3.Humans who have pets tend to be healthier than humans who do not have pets. Which of these terms applies to the relationship between a human and a pet?
Answer: mutualism
4.What is implied by the reference, "biotic portion of an ecosystem"?
Answer: the "living" portion of the ecosystem
5.What term applies to the relationship between a dog and a blood-sucking tick?Answer: parasitism
6.An egret eats insects stirred up by grazing animals. Which of these terms applies to the relationship between the egret and the grazing animal?Answer: commensalism
7. The concept that two species cannot occupy the same ecological niche simultaneously and continuously is called:Answer: the competitive exclusion principle
8. What is a serious problem that will result from predicted rises in global temperature?Answer: Species will be lost because rises in global temperature will exceed the rate at which natural selection can allow most organisms to adapt.
9. Why do most mutations occur?Answer: Random errors in DNA replication cause mutation.
10. What is the best definition of speciation?Answer: the process by which new species form
11. What is speciation resulting from two populations becoming isolated from one another?Answer: allopatric speciation
12.A scientific name is composed of two parts. What are they?Answers: genus and species
13. What is the smallest group that can evolve?Answer: population
14. A forest fire kills off 90% of a rabbit population. What has occurred in this population?Answer: bottleneck
15. How do founder effect, genetic drift, and a bottleneck relate to each other?Answer: Founder effect and bottleneck are types of genetic drift.
16. In the common phrase, "survival of the fittest," what determines how fit an individual is?Answer: reproductive success
17. Which postulate of natural selection is best supported by the work of Gregor Mendel?Answer: Traits are passed from parent to offspring.
18. What can you conclude by looking at the following sequences from the cytochrome c gene of humans, mice, and an unknown organism? Human - ATGGTCTCTTT Mouse - ACGGTCTGTTC Unknown - ACGGTGTGTTCAnswer: The unknown organism is more closely related to mice than to humans.
19. What conclusion can you make from comparing the bones in a bird wing, a bat wing, and a pterodactyl wing?Answer: These organisms share a common ancestor with each other.
20. When predatory snakes eat songbirds with the loudest songs, they are acting as agents of what?Answer: natural selection
