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Grant Castaneda

University of California - San Diego

Biography

Hello, my name is Grant Castaneda currently I am a first year at UCSD studying Bioinformatics, which is essentially computational biology. I love to workout, read and hang with friends. On campus I am doing cancer research and I am in a biology club!

Education

BS Bioinformatics
University of California - San Diego

Topics Covered

The Cell
The Cell Cycle and Cellular Reproduction
Plant Diversity
Vascular Plant Structure and Development
Vascular Plant Transport
Soil and Plant Nutrition
Cell Signaling
Plant Responses to Signals
Angiosperm Reproduction and Biotechnology
Life - A Darwinian Approach
Phylogeny
Animal Diversity
Invertebrates
Vertebrates
Population Evolution
The History of Life
Animal Form and Function
Animal Reproduction and Development
Animal Nutrition
Animal Behavior
An Introduction to the Biosphere
Viruses
Population Ecology
Ecosystems and Restoration Ecology
Mendelian Genetics
The Central Dogma - Gene Expression
Speciation
The Chemistry of Life
Bacteria and Archaea
Metabolism 101
Cellular Respiration and Fermentation
Hormones and the Endocrine System
The Nervous System
Circulation and Gas Exchange
The Immune System
Sensory and Motor Mechanisms
Osmoregulation and Excretion
Conservation Biology and Global Change
Community Ecology
Computer Science Overview
Atoms, Molecules and Ions
Electronic Structure
Periodic Table properties

Grant's Textbook Answer Videos

04:58
Campbell Biology

EVOLUTION CONNECTION Many species can reproduce either asexually or sexually. Explain what you think might be the evolutionary significance of the switch from asexual to sexual reproduction that occurs in some organisms when the environment becomes unfavorable.

Chapter 13: Meiosis and Sexual Life Cycles
Grant C.
02:00
Campbell Biology

Unlike an earthworm's metanephridia, a mammalian nephron
$$\begin{array}{l}{\text { (A) is intimately associated with a capillary }} \\ {\text { network. }} \\ {\text { (B) functions in both osmoregulation and }} \\ {\text { excretion. }} \\ {\text { (C) receives filtrate from blood instead of coelomic fluid. }} \\ {\text { (D) has a transport epithelium. }}\end{array}
$$

Chapter 44: Osmoregulation and Excretion
Grant C.
01:05
Campbell Biology

Which process in the nephron is least selective?
$$\begin{array}{ll}{\text { (A) filtration }} & {\text { (C) active transport }} \\ {\text { (B) reabsorption }} & {\text { (D) secretion }}\end{array}$$

Chapter 44: Osmoregulation and Excretion
Grant C.
00:55
Campbell Biology

Which of the following animals generally has the lowest volume of urine production?
$$\begin{array}{l}{\text { (A) vampire bat }} \\ {\text { (B) salmon in fresh water }} \\ {\text { (C) marine bony fish }} \\ {\text { (D) freshwater flatworm }}\end{array}$$

Chapter 44: Osmoregulation and Excretion
Grant C.
01:10
Campbell Biology

The high osmolarity of the renal medulla is maintained by all of the following except
\begin{equation}\begin{array}{l}{\text { (A) active transport of salt from the upper region of the }} \\ {\text { ascending limb. }} \\ {\text { (B) the spatial arrangement of juxtamedullary nephrons. }} \\ {\text { (C) diffusion of urea from the collecting duct. }} \\ {\text { (D) diffusion of salt from the descending limb of the loop }} \\ {\text { of Henle. }}\end{array}\end{equation}

Chapter 44: Osmoregulation and Excretion
Grant C.
01:06
Campbell Biology

In which of the following species should natural selection favor the highest proportion of juxtamedullary nephrons?
\begin{equation}\begin{array}{l}{\text { (A) a river otter }} \\ {\text { (B) a mouse species living in a temperate broadleaf forest }} \\ {\text { (C) a mouse species living in a desert }} \\ {\text { (D) a beaver }}\end{array}\end{equation}

Chapter 44: Osmoregulation and Excretion
Grant C.
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