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alexandr1967 [171]
3 years ago
8

An earthquake decimates a ground-squirrel population. The surviving population happens to have broader stripes on average than t

he initial population. If broadness of stripes is genetically determined, what effect has the ground-squirrel population experienced during the earthquake?
A. directional selection
B. disruptive selection
C. a founder event
D. a genetic bottleneck
Biology
1 answer:
nikitadnepr [17]3 years ago
6 0

Answer: D. a genetic bottleneck

Explanation:

A genetic bottleneck also known as a population bottleneck is one that describes a sharp reduction in the size of a population caused by environmental events like in the above or caused by human activities.

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vaieri [72.5K]
“Diffusion sees molecules in an area of high concentration move to areas with a lower concentration, while osmosis refers to the process by which water, or other solvents, moves through a semipermeable membrane, leaving other bits of matter in its wake.”
Reference: sciencing.com
Hope this helps! :)
7 0
3 years ago
A baby is assessed at one minute after birth using the Apgar scale. Three of the five vital signs are good, but the baby is weak
timama [110]

Answer: The two vital signs the medical team is concerned about are:

1. MUSCLE TONE

2. REFLEX IRRITABILITY

Explanation:

What does APGAR stand for, and what does it measure?

When the scoring system was put into common use, medical professionals created an acronym using Apgar’s last name, so that each criterion included in the assessment would be easier to remember. The five criteria assessed in the Apgar score are:

A – Appearance (skin color)

This is an evaluation of the baby’s skin color. The medical team measures if the baby blue or pale all over, blue at the extremities, or pink all over.

P – Pulse (heart rate)

During this evaluation, the medical team measures if the baby’s heart rate is absent, slow (<100 beats per minute (bpm), or fast (>100 bpm).

G – Grimace (reflex irritability/response)

During this evaluation, the medical team asks if the baby lacks a response to stimulation, responds with a grimace, or responds by crying and pulling away.

A – Activity (muscle tone)

During this evaluation, the medical team asks if the baby is limp, if the baby has some flexion (joint movement), or if the baby shows active motion.

R – Respiration (breathing ability)

During this step, the medical team asks if the baby is failing to breathe, if the baby has a weak cry and slow breathing, or if the baby is breathing well and crying normally.

8 0
3 years ago
"Osteocytes and layers of extracellular matrix, which are concentrically clustered around a central canal, for a cylinder-shaped
melisa1 [442]

Answer:

Osteon

Explanation:

Bone tissue may be of two types; compact bone tissue that form the outer hard covering of bones and spongy bone tissue that form inner soft portion of bone. Osteon are found in compact bone.

Osteons are cylindrical structures composed from clustre of Osteocytes and layers of extracellular matrix around a central canal connected by canaliculi for the transportation of blood. The haversian canal is surrounded by lamella that comprises the osteon. Osteons run parallel to long axis of bones and present in bones of many mammals, reptiles and birds. In some bones the stress or pressure in applied from few directions and osteons are aligned in that direction so they provide protection from bone bending or fracturing from compressive forces.

7 0
3 years ago
2 Points
Jlenok [28]

Answer:

B. When there are limited resources

4 0
3 years ago
Read 2 more answers
10.<br> _________produces pollens and______<br> develops into the fruit.
vichka [17]

Answer:

stamen produces pollen ovules develops into fruit

Explanation:

8 0
3 years ago
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