生物
细胞生物学、遗传学、生态学与生命科学基础。
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there are many points during the cell cycle when the process of divisio…
to destroy damaged or old cells
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what kind of animal could you find in a freshwater biome? racoon beaver…
Beavers
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errors that are made during dna replication may result in a. a viral in…
D. mutations
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in 2011, a bog body with skin intact was found near the town of cashel …
You could see the pores and hairs on Cashel Man's arm.
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which term identifies a light - absorbing pigment? photosystem ferredox…
chlorophyll
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which statement best describes the overall change that occurs as a resu…
One cell becomes two cells that have identical copies of DNA.
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which equation represents fertilization? haploid + diploid = diploid di…
haploid + haploid = diploid
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in 2011, a bog body with skin intact was found near the town of cashel …
C. You could see the pores and lines on Cashel Man's skin.
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which best illustrates the result of the process of meiosis? a pea plan…
B. A daughter looks different from both her mother and her father.
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which statement best distinguishes the light - dependent (l - d) reacti…
The L - D reactions occur in the thylakoid membrane, and the L - IND reactions occur in the stroma.
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what post - war organization provided for international diplomacy? un w…
UN
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but was this gray whales appearance really a freak occurrence, or is th…
Gray whales had not lived in the Atlantic Ocean for centuries.
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again from the sea before disappearing. 2 the team immediately shared t…
Gray whales had not lived in the Atlantic Ocean for centuries.
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review the first and second paragraphs. the wandering whale 1 on may 8,…
Gray whales had not lived in the Atlantic Ocean for centuries.
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11. examine model 2. number the steps below in order to describe the re…
1. **Question 11**: - \(2\). Hydrogen bonds between nucleotides break. - \(3\). Strands of DNA separate. - \(4\). Free nucleotides are attracted to exposed bases on the loose stra…
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describing tissues complete the sentence to describe muscle tissue. mus…
cells
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the menstrual cycle days 1 - 8 the cycle begins with the first day of m…
When the egg is fertilized, it implants in the uterine lining, menstruation stops, hormonal changes support pregnancy, and the uterine lining nourishes the embryo.
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what organs make up the female reproductive system? when an egg cell is…
The ovum travels from the ovary through the fallopian tube to the uterus.
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in his study of pea plants, gregor mendel used which method to produce …
cross - pollination, by using parents that had different traits
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why is meiosis important for organisms? it allows for genetic variation…
It allows for genetic variation among organisms.
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during which phase of meiosis does crossing over of chromosomes occur? …
prophase I
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which three processes are methods of genetic recombination? natural sel…
crossing over, independent assortment, and fertilization
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which best illustrates how gregor mendel used creativity that lead to s…
He used pea plants to study the patterns of heredity.
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which process of genetic recombination involves genes from both parents…
fertilization
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which method of genetic recombination is illustrated in the diagram? cr…
crossing over
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three cells undergo meiosis. how many haploid cells are produced? 3 6 9…
12
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how many cell divisions occur during meiosis? one two three four
two
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which consist of sperm cells and egg cells? gametes tetrads diploids ch…
gametes
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17. 7 points 32 in the early 1900s, thomas hunt morgan was among the fi…
J. The event provides genetic diversity in eukaryotic cells.
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select the passage that has a more melodramatic tone. oh, this journey!…
The first passage (Oh, this journey! It was two hours cut clean out of his life...).
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which process occurs within the mitochondria? lactic acid fermentation …
Krebs cycle
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let c be the function whose graph is given to the right. this graph rep…
\(220\)
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one of the goals of the congress of vienna was to restore europe to the…
before the French Revolution and Napoleonic Wars.
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which structures are found in each cell type? complete the table. smoot…
- Smooth endoplasmic reticulum: Prokaryotic cells - no, Eukaryotic cells - yes - Cytoplasm: Prokaryotic cells - yes, Eukaryotic cells - yes - Rough endoplasmic reticulum: Prokaryo…
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read the passage from \the latin deli: an ars poetica.\ all wanting the…
The speaker is describing a scene in the third person as a sentimental observer.
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biological hazards can be associated with animals and insects. how can …
A. Avoid contact with animal feces, B. Practice personal hygiene
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why do organisms that are separated from the original group sometimes b…
Their genes are isolated from the original group.
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hardy-weinberg equilibrium requires 5 conditions to be met. which of th…
No natural selection can occur.
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what is equilibrium? a state where a population is evolving a state whe…
a state where things aren't changing
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compare and contrast plant and animal cells using the venn diagram belo…
- **Plant cell**: Chloroplast, large central vacuole - **Both**: Energy produced in mitochondria, cell membrane - **Animal cell**: Small vacuoles, rounded shape
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select the taiga ecosystem. this ecosystem has: long, cold winters and …
The second ecosystem (with long, cold winters and short, cool summers, many evergreen trees, and soil poor in nutrients) is the taiga ecosystem.
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select the tundra ecosystem. this ecosystem has: • long, cold winters a…
The first ecosystem (with long, cold winters and short, cold summers, mostly small plants, soil frozen year - round) is the tundra ecosystem.
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many historians claim that the age of enlightenment ended around 1800. …
C. In 1800, many European countries had colonies in the Americas. D. Most countries in Latin America gained independence from European countries by 1830.
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16. * 7 points 2017 - q39 39 which diagram demonstrates how crossing - …
C.
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2015 - q44 44 human body cells each have 46 chromosomes in their nuclei…
G. 23 chromosomes
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14. * 7 points 2014 - q12 12 sexual reproduction in animals depends on …
H. Meiosis
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during blood clotting, a broken blood vessel triggers a cascade of fact…
a positive feedback loop.
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regulation of your body temperature is primarily controlled by which sy…
nervous
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13. * 7 points 2013 - q26 26 crossing - over between nonsister chromati…
J. Genetic variation
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which of the following are hormones that are produced in abundance in m…
androgens
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11. what process is pictured? replication translation substitution muta…
11. crossing over 12. To increase genetic diversity
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question 6 1 pts which of the following is correct about homeostasis? o…
All living things must maintain homeostasis in order to survive.
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8. during which phase are new nuclei formed around all sets of chromoso…
- 8. telophase - 9. 4 - 10. half the number as the parent cell
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5. when does crossing over occur? * interphase prophase i prophase 2 me…
- 5. prophase I - 6. metaphase - 7. anaphase
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question 2 1 pts by the end of a normal first trimester, the zygote has…
has developed recognizable arms and legs.
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3. when does the parent cell copy its dna? check all that apply (3) * b…
- **Question 3**: before cell division begins, interphase, S phase - **Question 4**: Chromosomes that code for the same traits, but come from different parents
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explain how independent assortment occurs in cells and explain its impo…
Independent assortment occurs during metaphase I of meiosis when homologous chromosome pairs align randomly at the metaphase plate, with each pair's orientation independent of oth…
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match the male and female reproductive structures with the roles that t…
- hollow tubule where fertilization occurs: oviduct - female reproductive tract where sperm is deposited: vagina - organ where zygote implants and embryo gestates: uterus - male r…
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1. meiosis is type of cellular reproduction that forms what type of cel…
1. gametes, sex cells, sperm, egg cells 2. 23
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explain the relationship between crossing over and genetic variation.
Crossing - over increases genetic variation. It does so by exchanging genetic material between homologous chromosomes during meiosis, creating new allele combinations in gametes. …
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identifying central idea - instruction - level e the image on the right…
freezer; pollen and moss scraps; plant materials
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identify the phases of meiosis ii described below. chromosomes are line…
- "Chromosomes are lined up by spindle fibers" → metaphase II. - "Nuclear envelope forms around each set of DNA" → telophase II. - "Sister chromatids are pulled apart" → anaphase …
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some people find the hairy tarantula to be super creepy. some of these …
A. a fingernail # 2. Answer-Explanation Format
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you are taking a hike through the temperate deciduous forest when you n…
Commensalism
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identify the phases of meiosis i described below. ogous chromosomes are…
- Homologous chromosomes are separated: anaphase I - Homologous chromosomes are paired: prophase I - Nuclear envelopes form around separated chromosomes: telophase I - Homologous …
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use the drop - down menus to identify the dependent clause in each comp…
1. While Patrick set the table 2. if he is running late 3. before she boarded the plane
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match the animal with its biome. animal 1black shaggy hair, large nonre…
None of the options are completely correct. But if we assume some basic biome - animal associations (polar bear - tundra, bird in evergreen - taiga), and overlook the Animal 1 mis…
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which of the following animals is not found in a temperate deciduous fo…
giraffes
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true or false: viruses do not have a plasma membrane, internal organell…
True
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question 4 why are some vaccines (like influenza) in continuous develop…
Certain viruses have a high mutation rate compared to other viruses.
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match the animal with its biome. animal 1black shaggy hair, large nonre…
Animal one lives in the taiga. Animal two lives in the tundra, but animal three lives in the taiga.
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question 2 in the replication process of viruses, viruses use _________…
glycoproteins
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question 1 1 pts viruses are classified as, since they are not consider…
acellular
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my turn for each word below, write two related words. 1. celebrate 2. g…
1. party, festivity 2. window, tumbler 3. attract, iron 4. calculate, figure 5. write, create 6. organism, life - science 7. despot, oppressor 8. identify, acknowledge 9. democrac…
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choose all the things that can determine a biome. temperature, precipit…
B. precipitation, temperature, elevation, latitude, nearness to water; D. Precipitation and temperature
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part 1: protists 1. which protists belong to the same eukaryotic superg…
d. amoebozoans
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what is one animal from the tropical rainforest? sloth cheetah penguin …
Sloth
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which biome has four forest layers that receive different amounts of su…
Tropical Rainforest
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you are taking a hike through the temperate deciduous forest when you n…
Commensalism
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central dogma review homework - due next class part 1: fill - in - the …
1. gene 2. transcription 3. nucleus 4. translation 5. ribosome 6. RNA 7. protein 8. Transcription 9. Translation 10. - Happens in the nucleus: Transcription - Creates a protein: T…
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which of the following animals is not found in a temperate deciduous fo…
giraffes
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most biodiverse biome temperate deciduous forest savanna prairie tropic…
Tropical Rainforest
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3. the amoeba is a single - celled protist that is found in pond water …
- To measure the surface area: Use a grid overlay (counting squares) or image - processing software. - For the shape - size relation: The irregular shape (with pseudopodia) increa…
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during the process shown above, the two strands of one dna molecule are…
A. replication
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in which of the following ways does genetic information typically flow …
C. DNA → RNA → proteins
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question 5 a fertilized egg is called a(n)________. zygote cloaca fetus…
zygote
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question 4 1 pts the fallopian tube connects the ovary and uterus. ovar…
ovary and uterus.
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question 2 which statement about sperm structure and function is correc…
Sperm have a large number of mitochondria in their midpiece. These mitochondria provide energy for movement of the flagella.
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question 50 of 50 which of the following describes the role of phloem i…
A. A two - way flow of water and carbohydrates from chloroplasts
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question 49 of 50 which of these groups has the most organisms? a. clas…
B. Phylum
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question 47 of 50 what is true about an adaptation? a. it harms the org…
C. An organism is born with it.
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question 46 of 50 which does the work of the immune system? a. lymphocy…
A. Lymphocytes
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question 45 of 50 which is a result of a seasonal change (meaning a cha…
D. Birds moving south when the weather gets colder
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question 44 of 50 how are bacteria different from viruses? a. bacteria …
B. Bacteria can exist outside a host.
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question 43 of 50 which is used to make many copies of dna? a. recombin…
A. Recombinant DNA technology
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question 42 of 50 which of the following uses a protein to move a molec…
B. Facilitated diffusion
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which group in an ecosystem performs photosynthesis? a. carnivores b. p…
D. Producers
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passage: plastic pollution has emerged as one of the most pressing envi…
C. Marine animals often mistake plastic for food, leading to fatal ingestion. B. It highlights the importance of collective action and awareness in addressing the issue.
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question 39 of 50 in which relationship do both organisms benefit? a. c…
B. Mutualism
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question 38 of 50 which of the following is an example of succession? a…
A. After a disaster, small plants begin to grow in the affected area and are then replaced by larger plants.