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MM

Myra M.

Biology

3 hours ago

Which of the following about the lymphatic system and infection is FALSE? Select one: a. Lymph is made from filtered blood plasma. b. Bowel and brain tissue can be infected with HIV via the lymphatic system. c. The lymphatic system is physically separate from the circulatory system. d. Free HIV virus is not found in lymph. e. Dendritic cells, after contacting a pathogen and displaying an antigen, migrate in lymph to lymphoid tissue.

MM

Myra M.

Biology

3 hours ago

Which of the following about the lymphatic system and infection is FALSE? Select one: a. Lymph is made from filtered blood plasma. b. Bowel and brain tissue can be infected with HIV via the lymphatic system. c. The lymphatic system is physically separate from the circulatory system. d. Free HIV virus is not found in lymph. e. Dendritic cells, after contacting a pathogen and displaying an antigen, migrate in lymph to lymphoid tissue.

MM

Myra M.

Biology

3 hours ago

A man discovered he was positive for HIV 6 years ago when he sought help because of a lung infection that turned out to be PCP. He gets his viral load and blood checked every 6 months; the lowest CD4+ T cell count he ever had was 4 years ago when his count was 318. At that time, he started taking ARVs. His CD4+ T cell/total lymphocyte ratio has never been lower than 20%. He has been undetectable for HIV for the last 3 years and his CD4+ T cells are generally around 600 and above 45%. Which of the following statements is FALSE? Select one: a. He started ART too late. b. He has never had an AIDS diagnosis. c. He is currently unlikely to transmit his HIV to a partner. d. He has HIV disease. e. He can expect to have a relatively normal life span.

MM

Myra M.

Biology

3 hours ago

Mark the BEST CORRECT answer about immune responses Select one: a. CTLs, from activated CD8+ T lymphocytes, destroy infected cells and cancer cells. b. If a pathogen with the same antigen re-infects a body, memory cells mount a rapid and powerful specific immune response. c. Cells that complete their lifespan undergo apoptosis. d. Neutrophils die by apoptosis after 1 day. e. All of the above are true.

IS

Irwa S.

Biology

None

What role do H+ and OH- ions play in pH?

LV

La V.

Biology

7 hours ago

Explain how the following cell transport systems work moving materials around inside the cell and other functions. Focus on structure and function, and describe how energy is used to accomplish these movements. Tubulin/Kinesin

ec

Emily C.

Biology

8 hours ago

What evidence is missing that is required to identify the species as a true hominin?

SP

Sachini P.

Biology

8 hours ago

Genes a and b are sex-linked and are 7 map units apart on the X chromosome of Drosophila. A female with genotype a+ b/a b+ is mated with a wild-type fly a+ b+/Y. a. What is the probability that one of her sons will be either a+ b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+ b+ in phenotype?

Ts

Tina S.

Biology

None

Consider the phrase(the quick brown fox jumped over the lazy dog) Which details of this situation would a physicist who is modeling the path of a fox ignore?

Ts

Tina S.

Biology

None

You decided to select a new car by using the scientific method how might you proceed?

BB

Bennett B.

Biology

14 hours ago

What is the final destination in which MM12 will function?

PY

Priyanka Y.

Biology

14 hours ago

Ebony body color (e), rough eyes (e), and brevis bristles (bv) are three recessive mutations that occur in fruit flies. The loci for these mutations have been mapped and are separated by the following map distances: e ro bv 20 mu 12 mu The interference between these genes is 0.4. A fly with ebony body, rough eyes, and brevis bristles is crossed with a fly that is homozygous for the wild-type traits. The resulting F1 females are test-crossed with males that have ebony body, rough eyes, and brevis bristles; 1800 progeny are produced. Give the phenotypes and expected numbers of phenotypes in the progeny of the testcross

RE

Reanne E.

Biology

17 hours ago

in in tomatoes, two pairs of genes affect the color of the ripe fruit as follows: R red flesh Y yellow skin r yellow flesh y colorless skin Dominance is complete for red flesh and yellow skin. If the genes are independently segregating, calculate the expected phenotypic ratios from the following crosses: a) Rryy x rrYy c) RrYY x Rryy b) RrYy x rr Yy d) RrYy x RrYy

JF

Jenaiya F.

Biology

None

KT

Kyia T.

Biology

None

AD

Ananda D.

Biology

None

What is structural and functional basis of changes when you increase muscle mass ?

AR

Alexandria R.

Biology

1 day, 3 hours ago

You need to cut 5 ?g of plasmid stock at a concentration of 1 ?g per ?L with KpnI. Design the digest. Be sure to indicate buffer choice, temperature and duration of digest.

TW

Thai W.

Biology

None

What type of organisms can the citrate test help in identifying

TW

Thai W.

Biology

None

Ty

Taylor Y.

Biology

None

I need help figuring out the two red boxes.

YS

Yash S.

Biology

1 day, 12 hours ago

which pair of amino acids will have the highest absorbance at 280 nm ? a) Thr and His b) Phe and Pro c) Trp and Tyr d) Phe and His

Cy

Chickenwings Y.

Biology

None

Help?

fb

Faith B.

Biology

1 day, 15 hours ago

Which is a major evolutionary trend in land plant life cycles? Group of answer choices a) instead of being approximately the same size and shape, gametophytes and sporophytes began to look different b) sporophytes became larger and long lived while gametophytes became drastically reduced c) in lineages that evolved more recently, such as angiosperms, spores are no longer produced d) sporophytes began to rely on gametophytes for all their nutritional needs

NS

Nafis S.

Biology

1 day, 15 hours ago

1. In meteorological studies, the number of actions will decrease as the height of the atmosphere increases. Until its peak in outer space is not found molecular oxygen. People who live in mountainous areas have higher hemoglobin levels than people who live in lowlands. Make an analysis of why this happened from a live application!

UJ

Ugo J.

Biology

1 day, 19 hours ago

Fresh water bony fishes maintain water balance by

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