Which abiotic factor is most likely in a desert?

W why do immune system cells contain large amounts of lysosomes

vovikov84 [41]

Some of those lysosomes contain secretions that will help the immune cells destroy foreign pathogens.
Hope that helped you.

5 0

2 years ago

Read 2 more answers

An owl has good night vision because its eyes can detect a light intensity as small as 5.0 × 10-13 W/m2. What is the minimum num

Lady bird [3.3K]

Answer:

Thus, the minimum number of photons per second is 77.34

Explanation:

Light intensity, $I_{min}$ = $5\times 10^{-13} W/m^{2}$

Pupil has a diameter, d = 8.5 mm

= 8.5 x $10^{-3}$ m

Radius of the eye, r = 4.25 x $10^{-3}$ m

∴ Area of the eye, A = $\pi .r^{2}$

= $3.14\times \left ( 4.25\times 10^{-3} \right )^{2}$

= $5.6\times 10^{-5} m^{2}$

Let $P_{min}$ be the minimum number of photons.

Therefore, $P_{min}$ = $I_{min}$ x A

= $5\times 10^{-13}$ x $5.6\times 10^{-5}$

= $2.8\times 10^{-17}$ W

Thus the minimum number of photons is given by

$N_{min}=P_{min}/E$

where E = $hc/\lambda$

= $\left (6.63\times 10^{-34}\times 3\times 10^{8} \right )/548\times 10^{-9}$

= $3.62\times 10^{-19} J$

Therefore, $N_{min}$ = $\frac{2.8\times 10^{-17}}{3.62\times 10^{-19}}$

= 77.34 photons per second

Thus, the minimum number of photons per second is 77.34

4 0

2 years ago

Phycobiliproteins are a complex of accessory pigments and proteins found in cyanobacteria but not in green algae. A researcher c

Ksju [112]

Answer:

Option D

Explanation:

Cyanobacteria preserve its photosynthetic pigments in the thylakoids which allows masking of green of chlorophyll a and other accessory pigment i.e phycobiliproteins (phycocyanin, allophycocyanin and phycoerythrin).

Chlorophyll a is mainly responsible for harvesting light for photosynthesis. Phycocyanin is blue in color, allophycocyanin is blue in color and phycoerythrine is red in color. These together harvest light in the green, yellow and orange part of the spectrum which cannot be used by other phytoplankton species

Hence, option D is correct

8 0

2 years ago

As they were examining joe in the er, joe was poked with a pin in a sequential pattern from his chest down to his abdomen. joe c

PilotLPTM [1.2K]

It is most likely the ventral ramus into the dorsal root ganglion. A spine nerve arises from the spine cord as branch-like structures which converge to form the ventral or dorsal root. This is the pathway for the motor and sensory neuron.

8 0

2 years ago

When making yogurt, bacteria and milk are mixed together and set in a warm area. The container is sealed and no gasses are allow

Ivenika [448]

Answer:

When making yogurt the tart flavor get in the end is more likely because the bacteria have carried out a type of respiration named lactic acid fermentation (option C).

Explanation:

The process of obtaining yogurt from whole milk involves the association of the bacterial species Streptococcus and Lactobacillus. In order to carry out the lactic acid fermentation that produces yogurt, the bacteria act in a different way:

Streptococcus is in charge of removing the oxygen from the milk product.
Lactobacillus promotes the conversion of lactose sugar into lactic acid.

This fermentation process leads to the conversion of milk into a coagulated and tart flavor product.

Other options are not correct because:

A. Photosynthesis : is the process that occurs in plants to obtain chemical energy from sunlight.

B. Alcoholic fermentation: in this chemical process alcohol is obtained from the fermentation of a sugar.

D. Aerobic cellular respiration: does not involve fermentation, but the series of processes that convert glucose into energy.

6 0

2 years ago