Science News
This private company launches starlink satellites
SpaceX
Standard pH of your blood and body temperature
7.3-7.4, and 37 Degrees Celsius
The human species falls into this phylum
Chordata
What is the name of the phenomenon where the light from a celestial body is stretched due to the expansion of the universe.
Redshift
If an electron accelerates to the right through a uniform electric field, in what direction is the electric field
The left
This telescope was launched into space aboard the space shuttle Discovery in 1990
Hubble Space Telescope
During the immune response, these cells do not secrete antibodies themselves but retain antigen specificity, allowing secondary responses to occur more rapidly
Hydra reproduce with this type of asexual reproduction
Budding
Do gravitating bodies like the Sun bend light inwards or outwards
Inwards
Magnetic field is to the right and current is into the page. What is the direction of the magnetic force?
In a major paleogenomics breakthrough, scientists recently sequenced RNA from this Ice Age animal for the first time, offering new insights into gene activity in extinct species
Mammoth
This genetic engineering tool was adapted from the natural bacterial defense system and is primarily used in altering genomes
CRISPR
This mechanism of evolution is driven by random chance and luck which alters allele frequencies and often have the largest effects in small populations
Genetic Drift
Consider Galaxies A and B, both of which have radius R. At a distance R from its center, Galaxy A’s rotational velocity is equal to v. Meanwhile, Galaxy B’s radial velocity dispersion is also equal to v. However, galaxy A is spiral while galaxy B is spherical elliptical and composed of uniform, evenly-spaced stars. Calculate the masses of both galaxies. (a) R/G; v2R/G (b) v2R/G; 5/6v2 R/G (c) v2R/G; 5/4v2R/G (d) v2R/G; 5v2 R/G (e) 5/2v2R/G; v2R/G
(d) v2R/G; 5v2R/G
When a dielectric is inserted while the battery stays connected, this capacitor quantity increases _______
Charge
Researchers at IIT-Kanpur have created an anti body-based biosensor that can track the activation of this type of receptor protein in live cells
GCPR
This organ is responsible for the exocrine process of producing enzymes such as amylase, proteases and lipases and the endocrine function involving the production of hormones such as insulin and glucagon
Pancreas
This type of angiosperm has a stem with scattered vascular bundles, leaves with parallel venation, and seeds with a single cotyledon is probably a _______
Monocot
True or False: When approaching a black hole, the most likely reason for not surviving is the gravitational pull of the hole.
False
A teenager is downloading pirated, compressed songs in MP3 format from the Internet. Each song is about 3 minutes long when played, and needs about 2.9 megabytes of computer storage. To fill a CD requires about 70 minutes of music. If a 56K modem is being used which gives on average about 30 kilobits/sec of data flow, how many minutes does it take to download a full CD's worth of songs, ignoring setup times and filename entries? A byte represents 8 bits.
5.01 hours
The newly approved gene therapy for sickle-cell anemia uses an autologous stem-cell transplant, in which a patient's own hematopoietic stem cells are gene edited outside the body. These edited cells specifically target which blood forming tissue when they are reinfused?
Bone marrow
Approximately how many grams of DNA is in a somatic cell
6 picograms
These membrane structures inside chloroplasts increase the surface area for light-dependent reactions and contain the protein complexes of the electron transport chain. Their presence is one of the key pieces of evidence supporting the endosymbiotic origin of chloroplasts.
Thylakoids or grana
Aliens in a nearby star system (located in a random direction from Earth) are looking for nearby planets using the transit method. What is the probability that they can see the Earth transit across the Sun? A 100% b. 5.8% c. 0.93% d. 0.47% e. 0.15%
d) .47%
A regular n-gon is a polygon with n equal edges as well as equal angles. Positive charges each of magnitude q sit on the corners of a regular 2024- gon. The distance from each charge to the center of the 2024-gon is a. If one of the charges is re- moved, what is the magnitude and the direction of electric field at the center?
kQ/r2 towards the removed charge